JP7599231B2 - Apparatus and program. - Google Patents

Description

The present invention relates to a device and program for calculating altitude differences.

There is a known golf support device that provides various information to golf players while playing on a golf course. For example, Patent Document 1 describes displaying information such as the distance from the current position to the green on a screen.

JP 2013-039423 A

For golf players, the distance from the current location to a destination such as the green is useful information, but the difference in altitude between the current location and the destination is equally useful. However, to date, there have been no golf support devices that can display information about the difference in altitude.

The reason for this is that it has been difficult to determine the difference in elevation from the current location to the destination with an accuracy (for example, ±1m accuracy) that can be used as a reference for playing, using small portable devices that can be used on golf courses. For example, possible methods for determining the difference in elevation include calculating it from air pressure, measuring the altitude using a GPS function, and determining it from digital elevation data (mesh data) and latitude and longitude, but these methods cannot achieve the above-mentioned objective.

That is, since atmospheric pressure varies depending on weather conditions, the altitude of the current location cannot be calculated from atmospheric pressure alone. Therefore, even if the altitude of the destination point is known, the difference in altitude between the current location and the destination point cannot be calculated. Furthermore, altitude measurements using GPS functions are not very accurate, and the altitude difference cannot be calculated with an error that can be used as a reference for playing. Furthermore, digital elevation data has a large data capacity, and it is not realistic to store digital elevation data for many golf courses in a portable device. Furthermore, digital elevation data has the problem of having a coarse mesh (even the most accurate data provided by the Geospatial Information Authority of Japan has a mesh size of 5 meters), and the only way to calculate the altitude between meshes is by interpolation. However, golf courses often have steep terrain, and in places where the altitude difference between meshes is very large (depressions, etc.), the altitude calculated by interpolation does not match the reality, which reduces the player's confidence in the display.

This application discloses an invention that addresses all or part of the above problems or other problems. This application discloses various devices and programs, such as devices and programs for calculating altitude differences that can be used in a variety of fields, not limited to those that calculate altitude differences as reference information for playing golf.

This application discloses, for example, the inventions described in the following configuration examples.

<Configuration Example 1>
A portable device having a function of reporting an altitude difference between a current point in a spatial area including a reference area and a destination point corresponding to the reference area and the destination point,
A storage means for storing reference area information indicating a position of the reference area and reference altitude difference information for calculating a reference altitude difference which is an altitude difference between the reference area and the destination point;
A location acquisition means for acquiring location information of the current location;
An air pressure measuring means for measuring air pressure;
a reference air pressure storage means for storing a reference air pressure, which is an air pressure measured by the air pressure measurement means when the current location is within the reference area;
and an altitude difference notifying means for calculating and notifying an altitude difference between the current point and the destination point based on a current atmospheric pressure, which is an atmospheric pressure measured by the atmospheric pressure measuring means at the present time, the reference atmospheric pressure, and the reference altitude difference information.

With this configuration, the user can know the altitude difference between the current location and the destination location within a spatial area, which can be useful in understanding the positional relationship between the current location and the destination location. Knowing the altitude difference between the current location and the destination location is useful in golf, orienteering, skiing, snowboarding, mountain climbing, etc.

The locational area is an area including a reference area and a destination point. The reference area is an area within the locational area, and the destination point is a point within the locational area that is separated from the reference area. The locational area may be an area of a route along which a person travels from the reference area to a destination point, an area on such a route, or an area including such a route, so that the user can know the elevation difference from the current location to the destination point. The locational area may include one reference area or multiple reference areas. The locational area may include one destination point or multiple destination points. The reference area may correspond to multiple destination points. In the case of multiple reference areas, each reference area may correspond to multiple destination points. A destination point may correspond to multiple reference areas. In the case of multiple destination points, each destination point may correspond to multiple reference areas.

The reference area information may be, for example, coordinate data defining the boundary of the reference area, but it is even better to use coordinates of the center of the reference area and data of the radius, since this reduces the amount of data to be stored in the storage means. The reference area information may be, for example, location information, or may be, for example, latitude and longitude information. For example, it may be a group of information on multiple latitudes and longitudes, or it may be information on a single latitude and longitude. For example, the location of the latitude and longitude may be the reference area, but it is preferable to use a specified area including the location of the latitude and longitude as the reference area. The specified area may be, for example, a radius of 10 meters centered on the location of the latitude and longitude. When there are multiple reference areas, the storage means may store position information of the multiple reference areas in association with the target location.

The reference altitude difference information may be the altitude of the reference area and the destination point, but it is better to use the altitude difference between the reference area and the destination point, since this reduces the amount of data stored in the storage means.

In this configuration, since the altitude difference is calculated using the atmospheric pressure measured by the atmospheric pressure measurement means, the amount of data stored in the storage means can be reduced compared to when the altitude difference is calculated using numerical altitude data stored in the storage means, and the altitude difference can be calculated while faithfully reflecting the undulations over a narrower range. Furthermore, even if the reference area or destination point is changed, it is only necessary to change the position information of the reference area and the reference altitude difference information in the storage means, which is advantageous in that data can be easily updated. When there are multiple reference areas and/or destination points, it is advantageous to store the reference altitude difference information in the storage means in association with each combination of the reference area and the destination point.

なお、上記式（１）、（２）における「101325（Pa）」は、海面気圧の標準値であるが、上記式（３）の高度差を求めることが目的であるため、上記標準値を使用しても問題はない。（（式３）で海面気圧の値が標高値算出に与える影響が差し引かれるので、（３）の高度差の算出値に海面気圧の値は殆ど影響しない。） The altitude difference between the current location and the destination point may be calculated, for example, by subtracting the altitude difference between the reference area and the current location from the reference altitude difference. The altitude difference between the reference area and the current location may be calculated, for example, from the pressure difference between the reference pressure and the current pressure, using a known formula that indicates the relationship between the pressure difference and the altitude difference. Such a formula is known. For example, the current pressure is CP and the reference pressure is TP, and the calculation may be performed using the following formulas (1) to (3).

In addition, "101325 (Pa)" in the above formulas (1) and (2) is the standard value of sea level pressure, but since the purpose is to find the altitude difference in the above formula (3), there is no problem in using this standard value. (Since the influence of the sea level pressure value on the altitude calculation is subtracted in (formula 3), the sea level pressure value has almost no effect on the calculated altitude difference in (3).)

The air pressure measuring means may be, for example, an air pressure sensor. The position acquiring means may be, for example, a GPS receiver. The notification by the notification means may be a voice notification, but is preferably a visual notification.

<Configuration Example 2>
An apparatus characterized in that the relationship between the reference area and the target location is set so that the time normally required to travel from the reference area to the target area is a time that can be assumed to be such that changes in air pressure due to weather fluctuations do not normally occur.

In this configuration, the inventor has focused on the fact that the atmospheric pressure does not change so much that it significantly affects the altitude difference calculation in a relatively short period of time, and has set the relationship between the reference area and the target area so that the time normally required to move from the reference area to the target area is a time during which atmospheric pressure changes due to weather fluctuations are considered not to occur normally (for example, within 10 minutes to within 30 minutes), so that the altitude difference between the current location and the destination point can be accurately calculated while moving from the reference area to the destination point. The time during which atmospheric pressure changes due to weather fluctuations are considered not to occur normally may be, for example, a time during which atmospheric pressure changes do not occur except in extreme weather conditions such as typhoons. The absence of atmospheric pressure changes may be, for example, atmospheric pressure changes whose effect on the calculated value of the altitude difference due to atmospheric pressure changes is smaller than the error allowed in light of the purpose of use of the device. The relationship between the reference area and the target point is a positional relationship, and the positional relationship may be determined taking into account the speed of the means of transportation from the reference area to the target area. For example, if the means of transportation is walking, the distance may be a distance that can be traveled on foot within several tens of minutes. This configuration is advantageous because it allows the user to know the difference in altitude between the current location and the destination point even if the destination point is not visible from the current location due to an obstacle (e.g., a hill or forest).

<Configuration Example 3>
A device characterized in that the reference area is a spatial area that can be considered to have no altitude difference, and is an area that serves as a starting position within the spatial area when a user carries the device and aims for the target point.

In this configuration example, the user can simply move from a start position in a spatial area toward a destination point, and thereafter know the difference in altitude between the current position in the spatial area and the destination point. In addition, since it can be considered that there is no altitude difference within the reference area, the altitude difference between the current position and the destination point can be accurately calculated regardless of the air pressure measured at any point within the reference area as the reference pressure. For example, it is preferable that there is no altitude difference if the altitude difference is smaller than the allowable error in light of the purpose of use of the device.

<Configuration Example 4>
The locational area includes a plurality of sets of the reference area and the destination points corresponding to the reference area;
The storage means stores the reference area information and the reference altitude difference information for each of the pairs,
The apparatus further comprises a set selection means for selecting the set,
The altitude difference notification means calculates the altitude difference between the current location and the destination point based on the current atmospheric pressure, the reference atmospheric pressure measured by the atmospheric pressure measurement means when the current location is in the reference area of the group selected by the group selection means, and the reference altitude difference information for the group.

This configuration is advantageous because it is possible to calculate and notify the altitude difference between the current location and the destination location for a pair selected from a plurality of pairs. The pair selection means may select a pair based on the position information of the current location, for example. For example, it is advantageous to select a pair that includes a reference area that is closest to the current location.

<Configuration Example 5>
the spatial area includes a plurality of partitioned areas,
The apparatus, wherein each of the partitioned areas includes the set.

In this manner, even if the locational area is relatively large and it takes a long time to move from one point to another within the area, and weather conditions may change during that time to the extent that they significantly affect the calculation of the altitude difference, by dividing the locational area into multiple partitioned areas and setting the reference area and destination point within each partitioned area so that it is possible to move from the reference area to the destination point in a short time (e.g., within 10 to 30 minutes) that does not cause changes in weather conditions, the altitude difference between the current location and the destination point can be accurately calculated in each partitioned area. For example, if the locational area is a mountain climbing course and it takes a long time (e.g., several hours) to move from the trailhead to the summit, it is preferable to divide the mountain climbing course into multiple partitioned areas that can be moved between in a relatively short time.

<Configuration Example 6>
The altitude difference notifying means, when the current point is within one of the defined areas, notifies an altitude difference between the current point and the target point contained in the one of the defined areas.

This configuration example is advantageous because it makes it possible to notify the altitude difference between the current location and the destination within each divided area.

<Configuration Example 7>
The apparatus according to claim 1, wherein the spatial area is an area within a golf course and the destination point is a point on a green.

In this configuration, it is preferable that the player can be provided with information useful for playing golf, such as the altitude difference between the current position and a position on the green at the golf course. In addition, the time to play one golf course hole in golf is relatively short (usually about 10 to 20 minutes), and during that time, the weather conditions rarely change to a degree that would affect the altitude difference calculation more than the accuracy required for reference information for playing (e.g., ±1m). Therefore, if the locational area is a golf course of one hole in the golf course, it is preferable that the player can be provided with the altitude difference between the current position and the destination point with sufficient accuracy as reference information for playing. In configuration example 7, which cites configuration example 5, if the locational area is a golf course of multiple holes (e.g., a golf course from hole 1 to hole 9) and the partitioned area is a golf course of one hole, it is preferable that the player can know the altitude difference between the current position and a position on the green at each golf course hole. The position on the green may be, for example, the center of gravity of the green. In this configuration, the altitude difference between the reference area and the current location should be calculated and reported at intervals of, for example, 5 seconds or less. This is because on a golf course, the altitude difference can change significantly if the player walks for about 5 seconds.

<Configuration Example 8>
The device, characterized in that the reference area is an area including a teeing ground.

In this configuration, because the rules of golf require the player to pass through a teeing ground, by setting the reference area to an area that includes the teeing ground, it is possible to more reliably measure the reference air pressure, and because areas that include teeing grounds often have a small difference in altitude, it is possible to accurately calculate the difference in altitude between the current location and the destination point.

<Configuration Example 9>
The storage means further stores reference point information indicating a position of a reference point located within the reference area;
the reference altitude difference is an altitude difference between the reference point and the destination point,
The reference air pressure holding means holds as the reference air pressure the air pressure measured by the air pressure measuring means when the current point is closest to the reference point.

In this configuration, since the closer a location is to the reference point, the more likely it is that the difference in altitude between the reference point and the destination point will be small, the reference altitude difference is set to the difference in altitude between the reference point and the destination point, and the reference air pressure is the air pressure measured when the current point is closest to the reference point, so that the difference in altitude between the current point and the destination point can be calculated with higher accuracy.

<Configuration Example 10>
the spatial region includes a plurality of the reference regions;
The storage means stores, for each of the plurality of reference areas, the reference area information and the reference altitude difference information for the reference area;
If the current point passes through a plurality of the reference areas during the process of moving to the destination point,
The altitude difference notifying means calculates the altitude difference between the current point and the destination point using the reference altitude difference information for the reference area to which the current point is closest.

In this configuration, reference altitude difference information for multiple reference areas is stored, and the altitude difference between the current location and the destination point is calculated using the reference altitude difference information for the reference area that the current location is closest to, which is advantageous because it is more likely that a more accurate current altitude difference can be calculated.

<Configuration Example 11>
The apparatus, wherein the reference area is a geometric shape.

In this configuration, since the reference area is a geometric shape, it is preferable that the reference area can be easily set. The geometric shape may be a circle, a square, or the like. For example, the outer shape of the area (e.g., a tee ground) to be included in the reference area may be determined by looking at an aerial photograph or by measuring with a GPS, and the geometric shape that includes the outer shape may be set as the reference area. For example, in the case of a circle, a point (e.g., the center of gravity) within the outer shape may be selected as the reference point, and a circle drawn around the reference point so as to include the outer shape may be set as the reference area. The inclusion may be, for example, circumscribing. For example, the reference area may be specified by data indicating a geometric shape. For example, vector data indicating a geometric shape, data of a formula indicating a geometric curve and its coefficients, etc. may be used, but it may simply be data of the center coordinates of the circle and data of its radius, etc.

<Configuration Example 12>
The altitude difference notifying means has a function of notifying the reference altitude difference instead of the altitude difference between the current point and the destination point when the current point is within the reference area.

In this configuration, when the current location is within the reference area, a more reliable reference altitude difference is reported, which is preferable. For example, if the reference area is an area including a teeing ground, the player has the most leeway to play when he or she is on the teeing ground, so the player can check a reliable altitude difference in a relaxed state. Note that when the current location is outside the reference area, it is preferable to have a function for calculating and reporting the altitude difference between the current location and the destination point based on the current air pressure, the reference air pressure, and the reference altitude difference information.

<Configuration Example 13>
The altitude difference notifying means notifies the reference altitude difference and the altitude difference between the current point and the destination point in the same manner.

This configuration is advantageous because it avoids the user feeling uncomfortable or bothered by the notification manner changing depending on whether the altitude difference displayed by the altitude difference notification means is the reference altitude difference or the altitude difference between the current location and the destination point. The same notification manner may mean, for example, that the display position, font, display size, display color, etc., when displaying the altitude difference on the display screen are the same.

<Configuration Example 14>
The storage means further stores location information of the destination point,
The apparatus according to claim 1, wherein said altitude difference notifying means stops notifying the altitude difference when the distance between said current point and said destination point becomes equal to or smaller than a certain value.

When approaching the destination point, it becomes easier for the user to visually estimate the difference in altitude between the current location and the destination point; on the other hand, the closer the current location is to the destination point, the greater the time since the reference air pressure was measured, and the greater the likelihood of an error in the calculation of the altitude difference due to weather fluctuations during that time. In this configuration, the altitude difference is not reported when the distance between the current location and the destination point falls below a certain value, which is advantageous in reducing the possibility of the user getting the impression that the reported altitude difference does not match their visual estimate. Within a range of 30m, it is easy for a normal player to visually estimate the altitude difference, so the certain value should be set to 30m.

<Configuration Example 15>
The method further comprises a history storage means for storing a history of the current location entering the reference area,
The altitude difference notifying means is configured not to notify the altitude difference if there is no history of the current location entering the reference area.

When the current location is not yet within the reference area, the altitude difference between the current location and the destination point cannot be calculated, so by not reporting the altitude difference, the user can be informed that the altitude difference has not been calculated. The manner of not reporting in this configuration may be different from the manner of not reporting in configuration example 12. For example, if the altitude difference reporting means reports the altitude difference by displaying a digital numerical value, the non-reporting in configuration example 12 may be performed by not displaying the numerical value (leaving the display position of each digit of the numerical value blank), and the non-reporting in configuration example 13 may be performed by displaying a bar in the display position of each digit of the numerical value, such as "- - -".

<Configuration Example 16>
the locational area includes a plurality of the destination points;
The altitude difference notifying means calculates and notifies an altitude difference between the current position and each of the plurality of destination points.

In this configuration, the altitude difference between the current location and the destination points for multiple destination points is displayed on a single screen, so the user can know the altitude difference between the current location and the destination point for each destination point without operating the device. For example, a spatial area may have two destination points, one on the left and one on the right, such as the green on a golf course, and which destination point, left or right, is available may vary for each spatial area, so the user does not have to perform the operation of selecting the target destination point for each spatial area. The altitude difference for each of the multiple destination points may be displayed, for example, on a single screen.

<Configuration Example 17>
The storage means further stores location information of the destination point,
The apparatus further comprises a distance informing means for informing a distance between the current point and the destination point.

In this configuration, the distance and altitude difference between the current location and the destination point are notified, which is advantageous because it makes it easier for the user to understand the positional relationship between the current location and the destination point.

<Configuration Example 18>
A program for causing a computer to realize the functions of the device according to any one of configuration examples 1 to 17.

The configurations described in the above-mentioned configuration examples may be combined to the extent that no contradictions arise. Furthermore, the components described in the above-mentioned configuration examples may be combined in any manner to the extent that no contradictions arise to form a new configuration example.

FIG. 1 shows a golf assist device 1 according to the present invention. FIG. 2 shows a system configuration of the golf assist device 1 according to the present invention. FIG. 3 shows a typical golf course 20 . FIG. 4 shows an example of a golf navigation screen displayed on the display unit 3. FIG. 5 shows an example of a golf navigation screen displayed on the display unit 3. FIG. 6 shows an example of a golf navigation screen displayed on the display unit 3. FIG. 7 shows an example of a golf navigation screen displayed on the display unit 3. FIG. 8 shows an example of a golf navigation screen displayed on the display unit 3. FIG. 9 shows an example of a horizontal golf navigation screen displayed on the display unit 3. FIG. 10 shows the flow of the altitude difference calculation and display process.

A golf support device and a program therefor according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The golf support device of this embodiment is a golf support device that displays the course layout of an actual golf course, measures the latitude and longitude of the current location, and notifies the player of the distance and altitude difference between the current location and a destination point such as the green in real time as the player moves, and is also called a golf navigation device.

Figures 1 and 2 show a preferred embodiment of a golf support device 1 according to the present invention. This golf support device 1 is equipped with a display unit 3 on the top surface of a flat, approximately rectangular case 2. This display unit 3 constitutes a touch panel. A backlight is built in, and visibility is improved by turning on the backlight of the screen when a button is operated or the screen is touched. A charging lamp 8 is located on the rear side of the top surface of the case 2.

A power button 4 is located on the side of the case 2. The power button 4 is used not only to turn the power on and off, but also as a location registration button and a button to lock and unlock the touch panel operation. Specifically, when the control unit 11 recognizes that the power button 4 has been pressed and held (e.g., for 2 seconds or more) while the power is off, the power turns on and the control unit 11 displays a specified main menu screen on the display unit 3.

In addition, when the power button 4 is pressed briefly while the power is on, the control unit 11 executes a location registration function. The location registration function will be described later. When the power button 4 is pressed and held while the power is on, the control unit 11 alternates between locking and unlocking the touch panel. In other words, if the current state is locked, it is unlocked and operation via the touch panel is enabled, and if the current state is unlocked, it is locked and operation via the touch panel is disabled. The current state is notified by an icon drawn at a specified position on the display unit 3.

An openable terminal cover 7 is attached to the rear of the case 2, and when the terminal cover 7 is opened as shown in FIG. 1(b), a micro USB terminal 9 is exposed. Charging can be performed by connecting an AC adapter to the micro USB terminal 9.

Inside the case 2, there is a control unit 11, a memory unit 12 connected to the control unit 11, a GPS receiver unit 13, an air pressure sensor 14, a geomagnetic sensor 15, an attitude sensor 16, and a battery 17.

The control unit 11 includes a microcomputer equipped with a CPU, ROM, RAM, flash memory, various peripheral circuits, interfaces, etc. When the power is turned on, the control unit 11 receives power from the battery 17 and starts operating. The control unit 11 executes various processes described below and realizes various functions by expanding and executing the OS and application programs recorded in the flash memory, etc., on the RAM. The control unit 11 is connected to the display unit 3, power button 4, etc., and receives operation signals from the power button 4, etc., and controls the display on the display unit 3.

The storage unit 12 is composed of recording media such as an internal memory and a removable external recording medium (such as a micro SD memory card). The storage unit 12 has a golf course data storage unit 12a and a processing data storage unit 12b.

The golf course data storage unit 12a stores golf course data, which is data related to multiple golf courses at one or multiple golf courses in Japan and overseas. In this embodiment, a golf course for one hole is called a "golf course", and a group of multiple golf courses (for example, a golf course from the 1st hole to the 9th hole, a golf course from the 10th hole to the 18th hole) is called a "course". A golf course (or an area including this), a course (or an area including this), or a golf course (or an area including this) may correspond to the "locational range" in the claims.

To explain the golf course data, we will now refer to Figure 3 to describe a typical golf course 20.

As shown in the figure, the golf course 20 includes a teeing ground 21 and a green 22. The figure shows a golf course 20 having two teeing grounds 21 and two greens 22. Generally, the number of teeing grounds in a golf course 20 for one hole is one to three. Generally, a golf course 20 for one hole may have only one green, or may have two greens on the left and right. When there are multiple teeing grounds 21, the teeing ground 21 to be used is generally determined by the designation of the golf course or an agreement between the players. When there are two greens 22 on the left and right, the green 22 to be used is generally determined by the designation of the golf course. The golf course 20 may have one or more obstacles 24, such as a bunker or a pond. The golf course 20 may include a fairway, rough, etc. Between one golf course 20 and the golf course before and after it (between the golf course 20 for the first hole and the clubhouse, etc.), there is a travel route 23, such as a cart path.

The golf course data includes layout images and hole data for each golf course 20 at each golf course.

The layout image is image data for displaying the layout (shape) of each golf course 20 on the display unit 3.

Hole data includes section latitude and longitude, object data, tee data and automatic movement point data.

The demarcated area 25 is the latitude and longitude of the four corners of the demarcated area 25 set for each golf course 20. The demarcated area 25 is an area that encompasses the area in which the player can move while playing on the golf course 20. In this embodiment, the shape of the demarcated area 25 is a rectangle. The demarcated area 25 is set as an area large enough to encompass the golf course 20.

The object data is data indicating the latitude and longitude of various objects in the golf course 20. Specifically, the objects include a destination point 28 set on the green 22, the edge of the green 22 closer to the tee ground 21 (hereinafter referred to as the "front green edge"), the edge of the green 22 farther from the tee ground 21 (hereinafter referred to as the "rear green edge"), and obstacles 24. The destination point 28 is set near the center of the green 22. More specifically, the center of gravity of a polygonal shape that roughly matches the green 22 is set as the target point 28 when a polygonal shape is drawn by looking at an aerial photograph or a course design drawing. For a golf course 20 with two greens 22 on the left and right, the latitude and longitude of the destination point 28, the front green edge, and the rear green edge of each of the left and right greens 22 are stored as object data. (Hereinafter, the destination point 28 on the left green 22 will be referred to as the "left destination point 28," and the destination point 28 on the right green 22 will be referred to as the "right destination point 28.") If there are multiple obstacles 24, the latitude and longitude of each obstacle 24 will be stored as object data.

Tee data is data regarding the reference area 26 established for each teeing ground 21 within the golf course 20.

The reference area 26 is set as a circular area that encompasses the teeing ground 21. Specifically, the outer shape of the teeing ground 21 (or the area where the teeing ground 21 may be set) is determined by looking at aerial photographs, course design drawings, etc., and the reference area 26 is a circle drawn so as to circumscribe that outer shape. If there are multiple teeing grounds 21, a reference area 26 is set for each teeing ground 21, and tee data is set for each reference area 26. The figure shows a case where multiple reference areas 26 do not have overlapping areas, but multiple reference areas 26 may have overlapping areas.

The tee data includes tee coordinates, tee radius, and the difference in reference altitude between the left and right. The tee coordinates are the latitude and longitude of the reference point 27 that is the center of the reference area 26. The tee radius is the radius of the reference area 26. The reference area 26 is defined by the tee coordinates and the tee radius. By defining the reference area 26 by the tee coordinates and the tee radius, the amount of data stored in the memory unit 12 can be reduced.

The left reference altitude difference is the altitude difference between the reference point 27 and the left destination point 28, and the right reference altitude difference is the altitude difference between the reference point 27 and the right destination point 28. The left and right reference altitude differences are calculated from the elevation value of the reference point 27 and the elevation values of the left and right destination points 28. These elevation values are calculated using values obtained by smoothing the values of the four elevation points closest to the target point (reference point 27 or destination point 28) from the Basic Map Information Digital Elevation Model elevation points, which are data on grid-like elevation points compiled by the Geospatial Information Authority of Japan. For golf courses 20 that have only one green 22, only the left reference altitude difference is set.

The automatic movement point data is data on a movement area 29 for determining the movement of the player from the previous golf course (or clubhouse) to the golf course 20. The movement area 29 is a circular area set near the movement route 23 on the near side of the golf course 20. The movement area 29 is set to an appropriate size and position that allows for reliable determination of the player's movement to the golf course 20. If there are multiple movement routes 23, etc., and it is necessary to determine the player's movement to the golf course 20, multiple movement areas 29 are set. The automatic movement point data includes the latitude and longitude of the center point of the movement area 29 and the radius (automatic movement point radius).

In addition to the above, the golf course data includes data such as information about the golf course (golf course ID and category, golf course name (kanji, furigana, English, abbreviated), country code, telephone number, postal code, prefecture ID (region overseas), prefecture name (region name overseas), time zone, address, maximum latitude and longitude of golf course division, minimum latitude and longitude of golf course division, etc.) and information about the course (course ID, course name (kanji, furigana, English, abbreviated), hole number addition, next course ID, etc.), and other information about the golf course (hole number, PAR number, etc.) for searching/selecting golf courses and courses and displaying information on the display unit 3. The golf course data also includes the elevations of reference points 27 and objects as redundant data.

The processing data storage unit 12b stores numerical values used in the altitude difference calculation and display process described below, as well as calculated numerical values.

The GPS receiver unit 13 determines the latitude and longitude of the current location based on signals from GPS satellites and provides the latitude and longitude to the control unit 11. The air pressure sensor 14 measures the current air pressure and provides the same to the control unit 11. The geomagnetic sensor 15 measures geomagnetism to determine the direction and angle in which the golf support device 1 is facing and provides the same to the control unit 11. The attitude sensor 16 is composed of an acceleration sensor and a gyro sensor, and provides information to the control unit 11 indicating whether the golf support device 1 is facing vertically or horizontally.

The functions of the control unit 11 will be described below based on specific display screens. When the control unit 11 determines that the latitude and longitude of the current position measured by the GPS receiving unit 13 has passed through the movement area 29, it reads out hole data of the golf course 20 including free movement point data for the movement area 29, and displays a golf navigation screen 30 on the display unit 3 showing a layout image of the golf course 20. Figure 4 shows an example of the golf navigation screen 30 when the golf course 20 has two greens 22 on the left and right (when the hole data includes object data for two destination points 28 on the left and right).

In the center of the golf navigation screen 30, a layout image of the golf course 20 currently being played is displayed with the green at the top. In addition, a self icon 31 is displayed at a position corresponding to the player's location (the latitude and longitude of the current location acquired from the GPS receiving unit 13) on the drawn layout image, and a flag icon 32 is displayed at a location corresponding to the pin position (cup position) on the green. This allows the player to know the course layout and the direction of the green 22, etc. In addition, a distance 33 from the current location to obstacles such as ponds and bunkers on the golf course 20 is displayed, and further, concentric lines 34 at equal intervals centered on the self icon 31 and a distance 35 from the current location to a position on the concentric lines 34 are displayed. This allows the player to know the distance to the obstacles on the golf course 20 and the approximate distance to any location on the golf course 20. By knowing this information, the user can confirm how to attack each hole even if it is his/her first course. The distance 33 to the obstacles can be switched between display/non-display by operating a button displayed at the bottom of the golf navigation screen 30.

The control unit 11 further detects the direction in which the device is facing based on the output of the geomagnetic sensor 15, and draws this direction as a directional indicator line (dotted line) 36 consisting of an arrow and a dotted line, superimposed on the golf navigation screen 30. The starting point of this directional indicator line 36 is the current position (user icon 31). As a result, when the user changes the orientation of the device while holding it, the directional indicator line 36 on the display screen rotates to follow the user's movement, so that by aligning the directional indicator line 36 with the green or the place where the user wants to hit the ball, the user can confirm that the target point is where the user is currently facing. Therefore, even if visibility is poor due to fog, the target is far away, or there are trees or obstacles, the user can accurately know the direction.

The control unit 11 also displays green data display sections 37L and R on the left and right of the golf navigation screen 30, and in the left green data display section 37L, it displays the distance and altitude difference to an object on the left green 22, and in the right green data display section 37R, it displays the distance and altitude difference to an object on the right green 22.

More specifically, the control unit 11 displays three distances D1 to D3 and the altitude difference ED in four vertical rows in the green data display units 37L and R. The distance D1 in the first row is the distance between the current location and the back green edge, the distance D2 in the second row is the distance between the current location and the destination point 28, and the distance D3 in the fourth row is the distance between the current location and the front green edge. The control unit 11 calculates and displays these distances from the latitude and longitude of the current location and the latitude and longitude of the destination point 28 and other points stored in the object data. The altitude difference ED in the third row is the altitude difference between the current location and the destination point 28. The method of calculating the altitude difference ED will be described later. The units of the distances D1 to D3 and the altitude difference ED displayed in the green data display units 37L and R are meters or yards, and the control unit 11 switches between meters and yards in response to the user's operation of a button displayed at the bottom of the golf navigation screen 30. The control unit 11 calculates the distances D1 to D3 and the altitude difference ED only when the current location measured by the GPS receiving unit 13 is within the defined area 25. If the current location cannot be measured or is outside the defined area 25, the control unit 11 displays "---" as the distances D1 to D3 and the altitude difference ED.

In this way, the distances D1 to D3 and the altitude difference ED for both the left and right greens 22 are displayed, so even if the player uses different greens 22, left or right, for each hole, the player can know the distances D1 to D3 and the altitude difference ED for the green 22 of interest without operating the device.

The control unit 11 also displays the distance D1 between the current point and the back green edge in a different color, such as green, the distance D2 between the current point and the destination point 28 in white, and the distance D3 between the current point and the front green edge in red, and displays the altitude difference ED in the same color as the distance D2 between the current point and the destination point 28. This makes it easier for the player to intuitively understand that the distances D1 to D3 are distances to different points, and that the distance D2 and the altitude difference ED are the distance and altitude difference between the same point (the current point and the destination point 28).

5 and 6 show golf navigation screens 30a and 30b that are displayed by the control unit 11 when the player performs a flick operation on the display unit 3 while the golf navigation screen 30 in FIG. 4 is displayed. FIG. 5 shows the golf navigation screen 30a that is displayed when a left flick operation is performed, with only the left green data display unit 37L displayed on the left side of the screen, and the hazard distance display unit 38 showing the distance to the obstacle 24 displayed on the right side of the screen. FIG. 6 shows the golf navigation screen 30b that is displayed when a right flick operation is performed, with only the right green data display unit 37R displayed on the right side of the screen, and the hazard distance display unit 38 showing the distance to the obstacle 24 displayed on the left side of the screen. In this way, the player can select whether to display both the left and right green data display units 37L and R (golf navigation screen 30) or to display either one of the left and right green data display units 37L and R and the hazard distance display unit 38 (golf navigation screens 30a and 30b) according to his/her preference. If there is only one green 22 on the golf course 20 (if the hole data does not include object data for the right destination point 28), the control unit 11 will always display the golf navigation screen 30a shown in FIG. 5, and will not display the golf navigation screens 30 and 30b shown in FIGS. 4 and 6, even if a flick operation is performed. In this specification, when there is no need to distinguish between the golf navigation screens 30, 30a, and 30b, they will simply be referred to as "golf navigation screen 30."

As shown in FIG. 4, the control unit 11 also displays a hole icon 40 at the top of the golf navigation screen 30, which indicates information about the golf course 20, such as the hole number and the number of pars. The illustrated hole icon 40 indicates that the golf course 20 currently being displayed is the 8th hole, and that the number of pars is "4". When the hole icon 40 is touched, the control unit 11 changes the golf course 20 displayed on the golf navigation screen 30. For example, if the golf course 20 for the 8th hole is displayed as shown in the figure, each time the hole icon 40 is touched, the control unit 11 sequentially displays the golf navigation screen 30 for the golf course 20 for the 9th hole, the 10th hole, and so on, on the display unit 3.

On the golf navigation screen 30, it is possible to display the distance between three points by touching any point on the layout image. That is, when the control unit 11 detects a touch operation on the layout image, the control unit 11 displays an icon 41 at the touched position, as shown in FIG. 7, and calculates and displays the distance 42 from the current point to the touched point, and the distance 43 from the touched point to the destination point 28. This allows the player to know the distances for the second and third shots, and to develop an appropriate strategy for attacking the course.

In addition, while the golf navigation screen 30 is displayed, the player can register a location on the golf course 20 by operating a switch or the like. That is, when the power button 4 is operated briefly, the control unit 11 obtains the latitude and longitude of the current location from the GPS receiving unit 13 and stores it in the memory unit 12 together with the current time. Location registration can be used, for example, to record the location where the ball was actually hit. If the registered location exists within the layout image displayed on the golf navigation screen 30, the control unit 11 draws a location registration icon 44 at the corresponding position, as shown in FIG. 8.

When the golf navigation screen 30 is displayed and the signal from the attitude sensor 16 detects that the golf support device 1 has been turned sideways, the control unit 11 switches the display on the display unit 3 to the horizontal golf navigation screen 50 shown in FIG. 9. In the horizontal golf navigation screen 50, the layout image around the green 22 is enlarged and displayed. This allows the player to see the detailed view around the green 22 with a simple operation of changing the orientation of the device. In the horizontal golf navigation screen 50, the control unit 11 displays a left green data display section 51L that displays the distance D2 from the current position to the left destination point 28 and the distance D3 to the front green edge of the left green 22, and a right green data display section 51R that displays the distance D2 from the current position to the right destination point 28 and the distance D3 to the front green edge of the right green 22, but does not display the distance to the back green edge or the elevation difference between the current position and the destination point 28. This simplifies the screen and makes it easier for the player to understand the displayed content. When the horizontal golf navigation screen 50 is displayed and a signal from the orientation sensor 16 detects that the golf support device 1 has been turned to portrait orientation, the control unit 11 switches the display on the display unit 3 to the golf navigation screen 30.

Figure 10 shows the flow of the calculation and display process of the altitude difference ED executed by the control unit 11 when the current position of the golf support device 1 is located within the partitioned area 25 of the golf course 20. The control unit 11 executes this calculation and display process using hole data read from the golf course data storage unit 12a when displaying the golf navigation screen 30. As described above, if there are two greens 22 on the left and right of the golf course 20, the altitude difference ED is calculated and displayed for both the left and right greens 22 in the left and right green data display units 37L, R. However, here, the process related to the calculation and display of the altitude difference ED for the left green 22 (the altitude difference ED displayed in the left green data display unit 37L) will be described. However, the process related to the calculation and display of the altitude difference ED for the left green 22 may also be mentioned in the description.

The control unit 11 starts the calculation and display process on the condition that the control unit 11 determines that the current location has passed through the movement area 29 based on the latitude and longitude of the current location measured by the GPS receiving unit 13 and the automatic movement point data of the golf course 20.

When the calculation and display process starts, in step S1, the control unit 11 sets the minimum tee distance TLm used as a processing parameter to an initial value. This initial value is set to a value (e.g., 256 m) that is sufficiently larger than the tee radii of all reference areas 26 stored in the golf course data.

In the next step S2, the control unit 11 identifies the reference area 26 of the reference point 27 closest to the current point based on the latitude and longitude of the current point measured by the GPS receiving unit 13 and the tee coordinates of each reference area 26 (hereinafter, the reference area 26 identified in step S2 is referred to as the "nearest tee area NT") and calculates the distance TL between the current point and the reference point 27 of the nearest tee area NT.

In the next step S3, the control unit 11 determines whether the current position is within the nearest tee zone NT, i.e., whether the distance TL is less than the tee radius of the nearest tee zone NT (the tee radius of the nearest tee zone NT is denoted as "tee radius Tr").

If the determination in step S3 is positive (Yes), the control unit 11 determines in step S4 whether the distance TL is less than the minimum tee distance TLm.

If the determination in step S4 is positive (Yes), the control unit 11 updates the value of the minimum tee distance TLm to distance TL in step S5. In this way, when step S5 is executed, the minimum tee distance TLm becomes smaller than the initial value, so by determining whether the minimum tee distance TLm matches the initial value in step S8 described below, it is possible to determine whether the player has ever entered the reference area 26 since first entering the golf course 20.

In step S6, the control unit 11 extracts the left and right reference altitude difference for the nearest tee area NT (the left reference altitude difference is denoted as the "left reference altitude difference LTED" and the right reference altitude difference is denoted as the "right reference altitude difference RTED") from the hole data, and stores the left and right reference altitude difference LTED and RTED, as well as the reference atmospheric pressure TP, which is the measurement value of the atmospheric pressure sensor 14 at that time, in the processing data storage unit 12b. Through step S6, the left and right reference altitude difference LTED and RTED for the reference area 26 of the reference point 27 to which the current point is closest while the player is moving within the golf course 20, and the reference atmospheric pressure TP at the time of closest approach are stored in the processing data storage unit 12b. If the determination in step S4 is negative (No), the control unit 11 skips steps S5 and S6.

In step S7, the control unit 11 displays the left reference altitude difference LTED stored in the processing data storage unit 12b as the altitude difference ED on the green data display unit 37L. As a result, when the golf support device 1 is within the reference area 26, the altitude difference between the reference point 27 and the destination point 28, which has been calculated in advance based on the altitude value of the base map information digital elevation model altitude point, is displayed on the display unit 3. Therefore, the player can see the exact altitude difference between the reference point 27 and the left destination point 28 at a time when he has time to check the altitude difference, such as when waiting for another player to take a tee shot.

If the determination in step S3 is negative (No), i.e., if the current location is not within the reference area 26, the process proceeds to step S8.

In step S8, the control unit 11 determines whether the minimum tee distance TLm is equal to the initial value. If the determination is affirmative (Yes), i.e., if there is no history of entry into the reference area 26, the control unit 11 does not calculate the altitude difference ED, and in step S9, displays a bar ("---") as the altitude difference ED on the green data display unit 37L. This lets the player know that the altitude difference ED between the current point and the destination point 28 has not been measured.

If the judgment in step S8 is negative (No), that is, if the minimum tee distance TLm is smaller than the initial value, the control unit 11 calculates the distance DLG from the current point to the destination point 28 on the left side in step S11 and judges whether the distance DLG is less than a certain value GN. If the judgment is positive (Yes), in step S12, the altitude difference ED in the green data display unit 37L is displayed as a blank (" "). This makes the altitude difference ED invisible within a range of less than a certain value GN from the green where it is considered easy for the player to visually estimate the altitude difference, and prevents the player's trust in the altitude difference ED display, which may be caused when an altitude difference ED that does not match the player's visual estimation is displayed. Note that, for the constant value GN in step S11, 30m is used when the green data display units 37L, R are displayed in meters, and 30 yards is used when they are displayed in yards. Regardless of whether meters or yards are used, if 30m is used as the constant value GN, for example, 30m is approximately 33 yards, so when displayed in yards, the odd number such as 32 yards would switch to a blank (" "), which could give the user a sense of discomfort, and this is prevented.

If the determination in step S11 is negative (No), in step S13, the control unit 11 calculates the altitude difference CED between the current point and the left destination point 28 based on the reference air pressure TP and left reference altitude difference LTED stored in the processing data memory unit 12b and the current air pressure CP, which is the measurement value of the air pressure sensor 14 at that time, and displays it as the altitude difference ED on the green data display unit 37L.

As a specific calculation method, the control unit 11 calculates the altitude difference ΔH by the following equations (1) to (3), and obtains the calculated value CED by subtracting the altitude difference ΔH from the left reference altitude difference LTED.

In golf, the time required to play one golf course 20 is about 10 to 15 minutes, and it is considered that the effect of changes in weather conditions within that time on the current atmospheric pressure CP is extremely small. Therefore, in step S13, the altitude difference between the current point and the destination point 28 can be accurately calculated and displayed, and the player can use the displayed altitude difference ED as a reference for playing.

After steps S7, S10, S12, and S13 are executed, the control unit 11 waits for about one second before moving the process to step S2. This causes steps S2 to S13 to be executed repeatedly, and the display of the altitude difference ED is updated about every second.

Although the preferred embodiments have been described above, the shapes, dimensions, materials, functions, operating modes, control modes, control parameters, operation modes, etc. of the devices, systems, and programs or their elements and components in the above embodiments are described as examples and may be changed.

For example, in the above embodiment, the golf support device 1 used on a golf course was described as an example, but the use of the device of the present invention is not limited to golf, and it can also be used as a device to notify the altitude difference between a current location and a destination location in orienteering, skiing, snowboarding, mountain climbing, etc.

In the above embodiment, the reference area 26 is an area including the teeing ground, but the reference area may be an area that coincides with the teeing ground, or an area other than the teeing ground. There is no limit to the size of the reference area, and for example, the area of the reference area may be infinitesimally small. For example, the reference area may be a single point that has no area.

In addition, in the above embodiment, the destination point 28 is described as being near the center of the green 22 (more precisely, the center of gravity of a polygon drawn to roughly match the outline of the green 22), but the destination point can also be another point, for example, another point within the green 22 or a point outside the green 22. The destination point does not have to be a single point with no area, but can be a collection of multiple points, or the destination point can have an area of a certain size.

The destination point may also be configured to be set by the user's operation. For example, in many golf courses, the position of the cup changes depending on the day. Therefore, if the user is allowed to set the position of the cup on that day as the destination point, the altitude difference between the current location and the position of the cup on that day is displayed, which is more convenient. The destination point may be set, for example, by the control unit 11 setting the latitude and longitude of the position touched by the user on the golf navigation screen 30 or the horizontal golf navigation screen 50 as the destination point. When the destination point is configured to be set by the user's operation, for example, the elevation values of the base map information digital elevation model elevation points within the green 22 (or near the green 22) are stored in the storage unit 12 as hole data, and the control unit 11 calculates the elevation value of the destination point set by the user using the value obtained by smoothing the elevation values of the four base map information digital elevation model elevation points closest to the destination point set by the user, and calculates the reference altitude difference using the calculated elevation value.

The method of calculating the altitude difference between the current point and the destination point and the type and format of data used for the calculation are not limited to the embodiment, and can be any other appropriate method, type, or format.

In the above embodiment, the control unit 11 stores the latitude and longitude of the current location when the location registration operation is performed in the memory unit 12. However, for example, when the location registration operation is performed, the control unit 11 may be configured to record the altitude difference between the current location and the destination point (the altitude difference ED displayed on the left and right green data display units 37L and R in steps S7 and S13) in the memory unit 12 according to the display calculation process at that time, along with the latitude and longitude of the current location at that time. The data recorded in this manner may be configured to be displayable on the display unit 3, or may be configured to be output to a personal computer or the like via a micro USB terminal 9 or the like, so that it can be displayed on the personal computer. The data may be displayed by calculating the distance and altitude difference between the two registered points, which allows the player to know the flight distance and altitude difference (the altitude difference between the points where the ball flew) for each shot. Since the flight distance of the ball is affected by the altitude difference (whether it is an uphill shot or a downhill shot, etc.), it is useful for the player to know the altitude difference along with the flight distance.

Although the golf support device 1 shown in FIG. 1 is suitable for hand-held carrying, the golf support device 1 can also be made into a device that can be worn on the wrist or the like in the form of a wristband. When made wearable on the wrist or the like, it is possible to configure the device to detect the player's swing using an acceleration sensor or the like, and to automatically register the location where the swing was detected by the control unit.

The base built into the golf support device 1 should be coated with a water-repellent coating, so that the golf support device 1 can be used safely even if it gets wet due to an unexpected heavy rain.

<Copy of claims>
<Claim 1>
A portable device having a function of reporting an altitude difference between a current point in a spatial area including a reference area and a destination point corresponding to the reference area and the destination point,
A storage means for storing reference area information indicating a position of the reference area and reference altitude difference information for calculating a reference altitude difference which is an altitude difference between the reference area and the destination point;
A location acquisition means for acquiring location information of the current location;
An air pressure measuring means for measuring air pressure;
a reference air pressure storage means for storing a reference air pressure, which is an air pressure measured by the air pressure measurement means when the current location is within the reference area;
and an altitude difference notifying means for calculating and notifying an altitude difference between the current point and the destination point based on a current atmospheric pressure, which is an atmospheric pressure measured by the atmospheric pressure measuring means at the present time, the reference atmospheric pressure, and the reference altitude difference information.
<Claim 2>
The device according to claim 1, wherein the relationship between the reference area and the target location is set so that the time normally required to travel from the reference area to the target area is a time during which changes in atmospheric pressure due to weather fluctuations can be considered not to normally occur.
<Claim 3>
The device according to claim 1 or 2, wherein the reference area is an area that can be considered to have no altitude difference and is an area that serves as a starting position within the spatial area when a user carries the device and aims for the target point.
<Claim 4>
The locational area includes a plurality of sets of the reference area and the destination points corresponding to the reference area;
The storage means stores the reference area information and the reference altitude difference information for each of the pairs,
The apparatus further comprises a set selection means for selecting the set,
The device according to any one of claims 1 to 3, wherein the altitude difference notifying means calculates an altitude difference between the current point and the destination point based on the current atmospheric pressure, the reference atmospheric pressure measured by the atmospheric pressure measuring means when the current point is in the reference area of the pair selected by the pair selecting means, and the reference altitude difference information for the pair.
<Claim 5>
the spatial area includes a plurality of partitioned areas,
The apparatus of claim 4 , wherein each of the partitioned regions includes one of the sets.
<Claim 6>
6. The device according to claim 5, wherein the altitude difference reporting means reports, when the current point is within one of the defined areas, an altitude difference between the current point and the target point contained in the one of the defined areas.
<Claim 7>
The device according to any one of claims 1 to 6, wherein the spatial area is an area within a golf course, and the destination point is a point on a green.
<Claim 8>
The device according to any one of claims 1 to 7, wherein the reference area is an area including a teeing ground.
<Claim 9>
The storage means further stores reference point information indicating a position of a reference point located within the reference area;
the reference altitude difference is an altitude difference between the reference point and the destination point,
the reference atmospheric pressure storage means stores, as the reference atmospheric pressure, the atmospheric pressure measured by the atmospheric pressure measurement means when the current point is closest to the reference point;
The device according to any one of claims 1 to 8, characterized in that
<Claim 10>
the spatial region includes a plurality of the reference regions;
The storage means stores, for each of the plurality of reference areas, the reference area information and the reference altitude difference information for the reference area;
If the current point passes through a plurality of the reference areas during the process of moving to the destination point,
10. The device according to claim 9, wherein the altitude difference notifying means calculates the altitude difference between the current point and the destination point by using the reference altitude difference information for the reference area to which the current point is closest.
<Claim 11>
The device according to any one of claims 1 to 10, characterized in that the reference area is a geometric shape.
<Claim 12>
The device according to any one of claims 1 to 11, characterized in that the altitude difference notifying means has a function of notifying the reference altitude difference instead of the altitude difference between the current point and the destination point when the current point is within the reference area.
<Claim 13>
13. The device according to claim 12, wherein the altitude difference notifying means notifies the reference altitude difference and the altitude difference between the current point and the destination point in the same manner.
<Claim 14>
The storage means further stores location information of the destination point,
14. The device according to claim 1, wherein the altitude difference notifying means stops notifying the altitude difference when the distance between the current point and the destination point becomes equal to or smaller than a certain value.
<Claim 15>
The method further comprises a history storage means for storing a history of the current location entering the reference area,
The device according to any one of claims 1 to 14, wherein the altitude difference notifying means does not notify the altitude difference when there is no history of the current location entering the reference area.
<Claim 16>
the locational area includes a plurality of the destination points;
The device according to any one of claims 1 to 15, wherein the altitude difference notifying means calculates and notifies an altitude difference between the current position and each of the plurality of destination points.
<Claim 17>
The storage means further stores location information of the destination point,
The device according to any one of claims 1 to 15, further comprising a distance informing means for informing a distance between the current point and the destination point.
<Claim 18>
A program for causing a computer to realize the functions of the device according to any one of configuration examples 1 to 17.

1...Golf support device 2...Case 3...Display unit 4...Power button 7...Terminal cover 8...Charging lamp 9...Micro USB terminal 11...Control unit 12...Memory unit 12a...Golf course data memory unit 12b...Processing data memory unit 13...GPS receiver unit 14...Atmospheric pressure sensor 15...Geomagnetic sensor 16...Attitude sensor 17...Battery 20...Golf course 21...Tee ground 22...Green 23...Movement route 24...Obstacles 25...Division area 26...Reference area 27...Reference point 28...Destination point 29...Movement area 30, 30a, 30b...Golf navigation screen 37L...Left green data display unit 37R...Right green data display unit 38...Hazard distance display unit 50...Horizontal golf navigation screen 51R...Right green data display unit 51L...Left green data display unit

Claims (4)

A function for obtaining the air pressure measured at the user's location;
a function of acquiring altitude difference information relating to an altitude difference between a reference point that is located within a reference area that is stored in advance in a storage means and a target point that is located at a position different from the reference point and that is stored in advance in the storage means ;
a function of notifying an altitude difference between the current position and the target point based on a first atmospheric pressure measured when the user was at the reference point, a second atmospheric pressure at the current position of the user, and the altitude difference information;
a relationship between the reference area and the target point is set so that a time normally required to travel from the reference area to the target point is a time during which it can be assumed that changes in atmospheric pressure due to weather fluctuations do not normally occur. The system according to claim 1 , wherein the reference point is a point within a reference area that is a spatial area in which there is no difference in altitude and that is an area that serves as a starting position within the spatial area when the user aims for the target point. The device has a function of acquiring location information of the user's current location,
The function of notifying is
The system according to claim 2 , wherein the altitude difference is not reported if there is no history of the current location entering the reference area. A program for causing a computer to realize the functions of the system according to any one of claims 1 to 3.

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