JP5818359B2 - Map display terminal, map display method, and program - Google Patents

Description

  The present invention relates to a map display terminal that displays a three-dimensional map, a map display method, and a program.

  Conventionally, navigation using a mobile terminal or the like has been performed by displaying a current location specified using GPS on a two-dimensional map or displaying guidance to a destination. However, the two-dimensional map has a problem in that the landscape in front of the eyes and the map are difficult to match. Therefore, there is a technology that makes it easy for the user to match the landscape in front of the map with the map by switching between a two-dimensional map and a three-dimensional map depending on whether the portable terminal is vertical or horizontal (for example, see Patent Document 1). .

JP 2010-107199 A

  However, the three-dimensional map preferred by the user is not necessarily the same, so that the prepared three-dimensional map is not always a user-friendly three-dimensional map. In addition, when the map is not easy to see, there is a problem that it is difficult for the user to match the scenery in front of the map with the map. The “three-dimensional level” referred to here is the degree of depth of an object existing in space or the degree of three-dimensionalization of an object shape.

  Therefore, in view of the above problems, the present invention can easily generate a 3D map that is easy to see for a user by generating a 3D map at an arbitrary three-dimensional level. An object of the present invention is to provide a map display terminal, a map display method, and a program that make it easy to match.

  The present invention proposes the following matters in order to solve the above problems. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this.

  (1) The present invention is a map display terminal that communicates with a map server that stores a two-dimensional map and position information and height information of a building on the two-dimensional map, and the position information of the current location of the terminal itself Based on position information acquisition means (for example, the position information acquisition unit 110 in FIG. 1) and the acquired position information of the current location, a two-dimensional map around the current location, and a building on the two-dimensional map. Map information acquisition means (for example, the map information acquisition unit 120 in FIG. 1) that acquires the position information and the height information from the map server, the position information of the acquired building on the two-dimensional map, and the Three-dimensional map information for calculating height information for generating a three-dimensional map for each predetermined angle set in advance as an elevation angle from the ground surface based on the height information and the acquired position information of the current location Calculation means For example, the map information storage means (for example, the map of FIG. 1) which memorize | stores the acquired 2D map and the calculated height information for 3D map generation | occurrence | production in FIG. Information storage unit 140), detection means (for example, detection unit 150 in FIG. 1) for detecting the inclination angle of the terminal and the direction in which the specific surface of the terminal is facing, and the detected inclination angle Is acquired from the map information storage means, and the acquired height information for generating the three-dimensional map, the acquired two-dimensional map, and the detected direction are acquired. And a three-dimensional map generation unit (for example, the three-dimensional map generation unit 160 of FIG. 1) that generates a three-dimensional map in the detected direction, and displays the generated three-dimensional map. A map display terminal is proposed.

  According to this invention, the location information acquisition means acquires location information of the current location of the terminal itself. The map information acquisition means acquires, from the map server, a two-dimensional map around the current location and location information and height information of the building on the two-dimensional map based on the acquired location information of the current location. The three-dimensional map information calculating means is a predetermined value set in advance as an elevation angle from the ground surface based on the acquired position information and height information of the building on the two-dimensional map and the acquired position information of the current location. For each angle, height information for generating a three-dimensional map is calculated. The map information storage means stores the acquired 2D map and the calculated height information for generating the 3D map. The detecting means detects the tilt angle of the terminal itself and the direction in which a specific surface of the terminal is facing. The 3D map generation unit acquires height information for generating a 3D map of an elevation angle corresponding to the detected tilt angle from the map information storage unit, and acquires the acquired height information for generating the 3D map. Based on the two-dimensional map and the detected direction, a three-dimensional map of the detected direction is generated. Therefore, by determining the three-dimensional level of the three-dimensional map according to the tilt angle of the map display terminal arbitrarily determined by the user, and generating the three-dimensional map at the determined three-dimensional level, the user can easily view the three-dimensional map. To make it easier to match the scenery in front of you and the 3D map. Moreover, by calculating in advance the information used for generating the three-dimensional map, the three-dimensional map can be changed smoothly according to the change in the tilt angle of the map display terminal.

  (2) According to the present invention, for the map display terminal of (1), the map information storage means determines an inclination angle that has not changed for a predetermined time when the detection means does not detect a change in inclination angle for a predetermined time. The three-dimensional map information calculating means stores a height for generating a three-dimensional map with the stored inclination angle as an elevation angle from the ground surface when the inclination angle is stored in the map information storage means. A map display terminal characterized by calculating information is proposed.

  According to this invention, the map information storage means stores the tilt angle that has not changed for a predetermined time when the detecting means does not detect the change of the tilt angle for a predetermined time. When the inclination angle is stored in the map information storage means, the 3D map information calculation means calculates height information for generating a 3D map with the stored inclination angle as an elevation angle from the ground surface. Therefore, since the inclination angle of the map display terminal maintained for a predetermined time is stored, the three-dimensional map of the three-dimensional map displayed on the map display terminal is displayed by displaying the three-dimensional map of the desired three-dimensional level for a predetermined time. Can be set.

  (3) According to the present invention, for the map display terminal of (2), the map information storage means stores the stored inclination when the detection means continues to detect a change in inclination angle for a predetermined time. A map display terminal characterized by deleting angles is proposed.

  According to this invention, the map information storage means deletes the stored inclination angle when the detection means continues to detect a change in inclination angle for a predetermined time. Therefore, by changing the tilt angle of the map display terminal, the setting of the three-dimensional map of the three-dimensional map displayed on the map display terminal is canceled, and the three-dimensional map of the three-dimensional level determined according to the tilt angle of the map display terminal. Can be displayed.

  (4) According to the present invention, for the map display terminals of (1) to (3), the map server includes the two-dimensional map and the position information and height information of the building on the two-dimensional map, A map display terminal characterized by storing the shape of a building on a two-dimensional map has been proposed.

  According to this invention, the map server stores the shape of the building on the two-dimensional map together with the two-dimensional map and the position information and height information of the building on the two-dimensional map. Accordingly, by expressing the shape of the building on the map in the three-dimensional map, it is possible to easily match the scenery in front of the map with the map.

  (5) According to the present invention, a map display terminal that communicates with a map server that stores a two-dimensional map and position information and height information of a building on the two-dimensional map, Based on position information acquisition means (for example, the position information acquisition unit 110 in FIG. 5) that acquires position information, and the acquired position information of the current location, a two-dimensional map around the current location, Map information acquisition means (for example, the map information acquisition unit 120 in FIG. 5) for acquiring the position information and the height information of the building from the map server, the acquired two-dimensional map, and the acquired 2 Map information storage means (for example, the map information storage unit 141 in FIG. 5) that stores the position information and the height information of the building on the three-dimensional map, the inclination angle of the own terminal, and the specific information of the own terminal The direction the face is facing and Detection based on detection means (for example, the detection unit 150 in FIG. 5) to detect, the position information and the height information of the acquired building on the two-dimensional map, and the acquired position information of the current location 3D map information calculation means (for example, the 3D map information calculation unit 131 in FIG. 5) for calculating the height information for generating the 3D map of the tilt angle, and the calculated height for generating the 3D map. Based on the information, the acquired two-dimensional map, and the detected direction, a three-dimensional map generating means (for example, the three-dimensional map generating unit 160 in FIG. 5) that generates a three-dimensional map in the detected direction; And a map display terminal characterized by displaying a generated three-dimensional map.

  According to this invention, the location information acquisition means acquires location information of the current location of the terminal itself. The map information acquisition means acquires, from the map server, a two-dimensional map around the current location and location information and height information of the building on the two-dimensional map based on the acquired location information of the current location. The map information storage means stores the acquired 2D map and the position information and height information of the building on the acquired 2D map. The detecting means detects the tilt angle of the terminal itself and the direction in which a specific surface of the terminal is facing. The three-dimensional map information calculation means is for generating a three-dimensional map of the detected inclination angle based on the position information and height information of the building on the acquired two-dimensional map and the acquired position information of the current location. Calculate height information. The three-dimensional map generation means generates a three-dimensional map in the detected direction based on the calculated height information for generating the three-dimensional map, the acquired two-dimensional map, and the detected direction. Therefore, a three-dimensional map of the three-dimensional map is determined according to the inclination of the map display terminal arbitrarily set by the user, and the three-dimensional map is generated at the determined three-dimensional level, so that the user can easily view the three-dimensional map. Provide and make it easy to match the scenery in front of you and the 3D map. In addition, by calculating information necessary for generating a three-dimensional map each time the inclination of the map display terminal is detected, the storage medium provided in the map display terminal can be used when the capacity of the storage medium is small. This is effective when the capacity is limited.

  (6) According to the present invention, communication is performed with a map server that stores a two-dimensional map and position information and height information of a building on the two-dimensional map, and position information acquisition means, map information acquisition means, 3 A map display method in a map display terminal comprising a three-dimensional map information calculation means, a map information storage means, a detection means, and a three-dimensional map generation means, wherein the position information acquisition means acquires position information of the current location of the terminal itself. The first step (for example, step S1 in FIG. 4) and the map information acquisition means, based on the acquired location information of the current location, a two-dimensional map around the current location, and a building on the two-dimensional map A second step of acquiring the position information and the height information from the map server (for example, step S2 of FIG. 4), and the three-dimensional map information calculating means The height for generating a three-dimensional map for each predetermined angle set in advance as an elevation angle from the ground surface based on the position information and the height information of the building and the acquired position information of the current location A third step for calculating information (for example, step S3 in FIG. 4) and the map information storage means store the acquired 2D map and the calculated height information for generating the 3D map. A fourth step (for example, step S4 in FIG. 4) and a fifth step (for example, in which the detection means detects the tilt angle of the terminal and the direction in which the specific surface of the terminal is facing) Step S5) of FIG. 5 and the 3D map generation means acquire height information for generating the 3D map of the elevation angle corresponding to the detected inclination angle from the map information storage means, and acquire the acquired 3D Height information for map generation, A sixth step (for example, step S7 in FIG. 4) for generating a three-dimensional map of the detected direction based on the acquired two-dimensional map and the detected direction; A map display method characterized by displaying a three-dimensional map has been proposed.

  According to this invention, first, in the first step, the position information acquisition means acquires the position information of the current location of the terminal itself. Next, in a second step, the map information acquisition means obtains the two-dimensional map around the current location, the location information and height information of the building on the two-dimensional map based on the acquired location information of the current location. Get from the map server. Next, in a third step, the three-dimensional map information calculation means calculates the position information and height information of the building on the acquired two-dimensional map and the acquired current position information from the ground surface. Height information for generating a three-dimensional map is calculated for each predetermined angle set in advance as an elevation angle. Next, in a fourth step, the map information storage means stores the acquired 2D map and the calculated height information for generating the 3D map. Next, in a fifth step, the detection means detects the tilt angle of the terminal itself and the direction in which the specific surface of the terminal is facing. In the sixth step, the 3D map generation means acquires height information for generating the 3D map of the elevation angle corresponding to the detected inclination angle from the map information storage means, and acquires the acquired 3D map generation information. Based on the height information, the acquired two-dimensional map, and the detected direction, a three-dimensional map of the detected direction is generated. Therefore, by determining the three-dimensional level of the three-dimensional map according to the tilt angle of the map display terminal arbitrarily determined by the user, and generating the three-dimensional map at the determined three-dimensional level, the user can easily view the three-dimensional map. To make it easier to match the scenery in front of you and the 3D map. Moreover, by calculating in advance the information used for generating the three-dimensional map, the three-dimensional map can be changed smoothly according to the change in the tilt angle of the map display terminal.

  (7) According to the present invention, communication is performed with a map server that stores a two-dimensional map and position information and height information of a building on the two-dimensional map, and position information acquisition means, map information acquisition means, 3 A program for executing a map display method in a map display terminal comprising a three-dimensional map information calculation means, a map information storage means, a detection means, and a three-dimensional map generation means, wherein the position information acquisition means A first step (eg, step S1 in FIG. 4) of acquiring the location information of the current location, and the map information acquisition means, based on the acquired location information of the current location, the two-dimensional map around the current location, A second step (for example, step S2 in FIG. 4) for acquiring the position information and the height information of the building on the two-dimensional map from the map server, and the three-dimensional map information calculation For each predetermined angle, a step is set in advance as an elevation angle from the ground surface based on the position information and height information of the building on the acquired two-dimensional map, and the acquired position information of the current location. In addition, a third step of calculating height information for generating a three-dimensional map (for example, step S3 in FIG. 4), the map information storage means acquires the acquired two-dimensional map, and the calculated three-dimensional map. A fourth step of storing the height information for generation (for example, step S4 in FIG. 4), and the detection means includes a tilt angle of the terminal, and a direction in which a specific surface of the terminal is facing. 5th step (for example, step S5 in FIG. 5), and the three-dimensional map generation means uses the elevation information for generating the three-dimensional map of the elevation angle corresponding to the detected inclination angle as the map information. Acquired from storage means, acquired Based on the height information for generating the three-dimensional map, the acquired two-dimensional map, and the detected direction, a sixth step (for example, step S7 in FIG. 4) that generates the three-dimensional map in the detected direction. ) And a program for causing a computer to execute.

  According to this invention, first, in the first step, the position information acquisition means acquires the position information of the current location of the terminal itself. Next, in a second step, the map information acquisition means obtains the two-dimensional map around the current location, the location information and height information of the building on the two-dimensional map based on the acquired location information of the current location. Get from the map server. Next, in a third step, the three-dimensional map information calculation means calculates the position information and height information of the building on the acquired two-dimensional map and the acquired current position information from the ground surface. Height information for generating a three-dimensional map is calculated for each predetermined angle set in advance as an elevation angle. Next, in a fourth step, the map information storage means stores the acquired 2D map and the calculated height information for generating the 3D map. Next, in a fifth step, the detection means detects the tilt angle of the terminal itself and the direction in which the specific surface of the terminal is facing. In the sixth step, the 3D map generation means acquires height information for generating the 3D map of the elevation angle corresponding to the detected inclination angle from the map information storage means, and acquires the acquired 3D map generation information. Based on the height information, the acquired two-dimensional map, and the detected direction, a three-dimensional map of the detected direction is generated. Therefore, by determining the three-dimensional level of the three-dimensional map according to the tilt angle of the map display terminal arbitrarily determined by the user, and generating the three-dimensional map at the determined three-dimensional level, the user can easily view the three-dimensional map. To make it easier to match the scenery in front of you and the 3D map. Moreover, by calculating in advance the information used for generating the three-dimensional map, the three-dimensional map can be changed smoothly according to the change in the tilt angle of the map display terminal.

  According to the present invention, a three-dimensional map of an arbitrary three-dimensional level can be generated based on the inclination of the map display terminal arbitrarily determined by the user, thereby easily providing a three-dimensional map that is easy to see for the user. It is easy to make the 3D map coincide with the previous landscape.

It is a figure which shows the function structure of the map display terminal which concerns on the 1st Embodiment of this invention. It is a figure explaining the calculation method of the height information for 3D map generation. It is a figure which shows the example of the three-dimensional map displayed on a map display terminal. It is a flowchart of the map display process which concerns on the 1st Embodiment of this invention. It is a figure which shows the function structure of the map display terminal which concerns on the 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the constituent elements in the present embodiment can be appropriately replaced with existing constituent elements and the like, and various variations including combinations with other existing constituent elements are possible. Therefore, the description of the present embodiment does not limit the contents of the invention described in the claims.

<First Embodiment>
The map display terminal 100 according to the first embodiment of the present invention will be described in detail with reference to FIGS.

<Functional configuration of map display terminal>
FIG. 1 is a diagram showing a functional configuration of a map display terminal 100 according to the first embodiment of the present invention. The map display terminal 100 is connected to the map server 200, generates a three-dimensional map at a three-dimensional level determined according to the tilt angle of the terminal based on information about the map acquired from the map server 200, and provides it to the user. It is a terminal.

  The map server 200 stores a 2D map for 2D display and position information and height information of a building on the 2D map. By storing position information and height information of buildings on the two-dimensional map in the map server 200, a three-dimensional map can be generated from the two-dimensional map. The map server 200 may store the building shape information and the hierarchy information together with the position information and height information of the building on the two-dimensional map.

  In the present embodiment, the configuration in which the map server 200 is provided as a separate body from the map display terminal 100 is illustrated, but regardless of this, the configuration in which the functions of the map server 200 are integrated into the map display terminal 100 may be used. .

  The map display terminal 100 is, for example, a mobile phone or a smartphone, and as shown in FIG. 1, a position information acquisition unit 110, a map information acquisition unit 120, a three-dimensional map information calculation unit 130, a map information storage unit 140, The detection unit 150 includes a three-dimensional map generation unit 160 and a display unit 170.

  The position information acquisition unit 110 acquires the position information of the current location of the map display terminal 100 in response to receiving a map display instruction from the user, and passes it to the map information acquisition unit 120. In addition, the position information acquisition unit 110 periodically acquires position information after receiving a map display instruction from the user until receiving a map display end instruction, and the position information acquisition unit 110 includes the acquired position information, The position information acquired last time is compared, and it is determined whether or not the map display terminal 100 has moved. Unlike the position information acquired last time, when it is determined that the map display terminal 100 has moved, the acquired position information is passed to the map information acquisition unit 120.

  Specifically, the position information acquisition unit 110 includes a GPS (Global Positioning System) antenna (not shown), and receives signals from a plurality of GPS satellites via the GPS antenna. Then, the position information acquisition unit 110 acquires the latitude / longitude obtained by demodulating the received signal as the position information of the current location of the map display terminal 100.

  The map information acquisition unit 120 acquires a two-dimensional map around the current location from the map server 200 based on the location information of the current location acquired by the location information acquisition unit 110. In addition, the map information acquisition unit 120 acquires the position information and height information of the building on the acquired two-dimensional map from the map server 200. In addition, when the map server 200 stores the building shape information and the hierarchy information together with the position information and the height information of the building on the two-dimensional map, the map information acquisition unit 120 also acquires the information.

  The three-dimensional map information calculation unit 130 is based on the position information and height information of the building on the two-dimensional map acquired by the map information acquisition unit 120 and the position information of the current location acquired by the position information acquisition unit 110. The height information for generating the three-dimensional map is calculated for each predetermined angle set in advance as the elevation angle from the ground surface.

  In addition, when the inclination angle which determines the solid level of the three-dimensional map determined by the user is stored in the map information storage unit 140 which will be described later, only the inclination angle stored in the map information storage unit 140 is stored. Based on the position information and height information of the building on the two-dimensional map acquired by the map information acquisition unit 120 and the position information of the current location acquired by the position information acquisition unit 110, the height for generating the three-dimensional map The length information may be calculated.

  Here, a method for calculating height information for generating a three-dimensional map will be described with reference to FIG. First, the distance between the current location 10 and each building (in FIG. 2, building A20, building B30) is calculated from the respective position information.

  Next, the upper limit heights 21 and 31 of each building are calculated from the calculated distance between the current location 10 and each building 20 and 30 and a predetermined angle. The predetermined angle is an elevation angle from the ground surface starting from the current location, and is α in this description. The elevation angle is determined by the inclination angle of the map display terminal 100. Thus, by determining the upper limit height of each building based on the elevation angle determined according to the tilt angle of the map display terminal 100, the three-dimensional level of the three-dimensional map can be changed according to the tilt angle. In addition, when a predetermined angle is set in advance, it is desirable that the predetermined angle be set at equal intervals between 0 degrees and 90 degrees, such as every 5 degrees or every 10 degrees.

  Then, the calculated upper limit height of each building is compared with the heights 22 and 32 of each building acquired by the map information acquisition unit 120. When the height acquired by the map information acquisition unit 120 is lower than the calculated upper limit height of each building, the height of each building acquired by the map information acquisition unit 120 is the three-dimensional in the case of the elevation angle α. The height for map generation. On the other hand, when the height acquired by the map information acquisition unit 120 is higher than the calculated upper limit height of each building, the upper limit height is set as the height for generating a three-dimensional map in the case of the elevation angle α.

  In FIG. 2, for the building A20, the height 22 acquired by the map information acquisition unit 120 is lower than the calculated upper limit height 21 of each building. To do. On the other hand, since the height B acquired by the map information acquisition unit 120 is higher than the calculated upper limit height 31 of each building, the upper limit height 31 is set as the height for generating the three-dimensional map. .

  The map information storage unit 140 stores the height information for generating the 3D map calculated by the 3D map information calculation unit 130 for each elevation angle from the ground surface used for the calculation and acquired by the map information acquisition unit 120. A two-dimensional map is also memorized. Note that the 3D map information calculation unit 130 does not store the 3D map generation height information calculated for the tilt angle stored in the map information storage unit 140 but the map information storage unit 140 stores the 3D map information. The information calculation unit 130 may directly pass to the 3D map generation unit 160 described later.

  In addition, when the detection unit 150 described later does not detect the change in the tilt angle of the map display terminal 100 for a predetermined time, the map information storage unit 140 determines the three-dimensional level of the three-dimensional map determined by the user, The inclination angle of the map display terminal 100 at that time is stored. Thereby, the three-dimensional level of the three-dimensional map displayed on the map display terminal 100 can be set. Further, when the inclination angle is stored in the map information storage unit 140 and the detection unit 150 described later continuously detects a change in the inclination angle of the map display terminal 100 for a predetermined time, the map information storage unit 140 stores the inclination angle. Remove the tilt angle. Thereby, the three-dimensional level of the 3D map set in the map display terminal 100 can be canceled.

  The detection unit 150 periodically detects the tilt and direction of the map display terminal 100, and includes a tilt angle detection unit 151 and a direction detection unit 152. The tilt angle detection unit 151 is an acceleration sensor, for example, and detects the tilt angle of the map display terminal 100. The direction detection unit 152 is, for example, a geomagnetic sensor or a gyro sensor, and detects a direction in which a specific surface of the map display terminal 100, for example, the display surface is facing.

  Further, the detection unit 150 determines whether the detected tilt angle of the map display terminal 100 and the direction in which the specific surface of the map display terminal 100 is facing differ from the previously detected tilt angle and direction. It is determined whether at least one of the directions has changed. Then, the detection unit 150 passes the detected inclination angle and direction to the three-dimensional map generation unit 160 when at least one of the inclination angle and direction changes.

  If the tilt angle is not stored in the map information storage unit 140, the 3D map generation unit 160 generates elevation information for generating a 3D map of the elevation angle corresponding to the tilt angle detected by the detection unit 150. Obtained from the map information storage unit 140. However, when the inclination angle detected by the detection unit 150 is 0 degree, the 2D map acquired by the map information acquisition unit 120 is displayed on the display unit 170, and thus the 3D map is not generated.

  In addition, when the map information storage unit 140 stores an inclination angle, the 3D map generation unit 160 generates an elevation angle corresponding to the inclination angle stored in the map information storage unit 140. Height information is acquired from the map information storage unit 140. Note that the 3D map generation unit 160 may directly acquire the height information for generating the 3D map calculated by the 3D map information calculation unit 130.

  The 3D map generation unit 160 then detects the detection unit 150 based on the acquired height information for generating the 3D map, the direction detected by the detection unit 150, and the 2D map acquired by the map information acquisition unit 120. A three-dimensional map of the direction detected in is generated.

  The display unit 170 displays the map generated by the 3D map generation unit 160.

  FIG. 3 shows an example of the inclination angle of the map display terminal 100 and a three-dimensional map displayed on the display unit 170. FIG. 3A shows a map displayed when the tilt angle is α, and FIG. 3B shows a map displayed when the tilt angle is 90 degrees. Thus, according to the inclination angle of the map display terminal 100, the three-dimensional level of the three-dimensional map is changed by changing the height of the building on the displayed three-dimensional map.

<Map display processing flow>
FIG. 4 is a flowchart of map display processing according to the present embodiment. This process starts when a map display instruction is received from the user.

  First, in step S <b> 1, the position information acquisition unit 110 acquires position information of the current location of the map display terminal 100.

  Next, in step S2, the map information acquisition unit 120 acquires the two-dimensional map and the position information and height information of the building on the two-dimensional map from the map server 200 based on the position information acquired in step S1. To do.

  Next, in step S <b> 3, the 3D map generation unit 160 includes the position information and height information of the building on the 2D map acquired by the map information acquisition unit 120, and the current location acquired by the position information acquisition unit 110. Based on the position information, height information for generating a three-dimensional map is calculated for each predetermined angle preset as an elevation angle from the ground surface.

  Next, in step S4, the map information storage unit 140 stores the 2D map acquired in step S2 and the height information for generating a 3D map for each elevation angle calculated from the ground surface calculated in step S3.

  Next, in step S <b> 5, the detection unit 150 detects the inclination angle of the map display terminal 100 and the direction in which the specific surface of the map display terminal 100 is facing.

  Next, in step S6, the three-dimensional map generation unit 160 determines whether or not the tilt angle detected in step S6 is 0 degrees. If the tilt angle is not 0 degree (NO), the process proceeds to step S7. If the tilt angle is 0 degree (YES), the process proceeds to step S8.

  Next, in step S7, the 3D map generation unit 160 uses the height information for 3D map generation acquired from the map information storage unit 140 on the basis of the inclination angle detected in step S5, and the map information storage unit 140. A three-dimensional map in the direction detected in step S6 is generated from the two-dimensional map stored in step S6.

  Next, in step S8, the display unit 170 displays the three-dimensional map generated in step S7 or the two-dimensional map acquired in step S2.

  Next, in step S9, the detection unit 150 determines whether at least one of the detected tilt angle of the map display terminal 100 and the direction in which the specific surface of the map display terminal 100 faces has changed. If it is determined that at least one of the tilt angle and direction has changed (YES), the process returns to step S6. On the other hand, if it is determined that neither the tilt angle nor the direction has changed (NO), the process proceeds to step S10.

  Next, in step S10, the position information acquisition unit 110 compares the acquired position information with the previously acquired position information, and determines whether or not the map display terminal 100 has moved. If it is determined that the current location of the map display terminal 100 has moved (YES), the process returns to step S2. On the other hand, if it is determined that the map display terminal 100 has not moved (NO), the process proceeds to step S11.

  On the other hand, in step S11, the map display terminal 100 determines whether a map display end instruction has been received from the user. If a map display end instruction is received from the user (YES), the process ends. On the other hand, if a map display end instruction has not been received from the user (NO), the process returns to step S9.

  Therefore, according to the present embodiment, a three-dimensional map at a three-dimensional level based on the tilt angle of the map display terminal 100 can be generated, so that the user can change the tilt angle of the map display terminal 100 to change the three-dimensional level at an arbitrary three-dimensional level. A map can be displayed. As a result, it is possible to easily provide a 3D map that is easy for the user to see, and to easily match the scenery in front of the user with the 3D map.

<Second Embodiment>
Hereinafter, a second embodiment of the present invention will be described with reference to FIG. In the present embodiment, every time the tilt angle of the map display terminal 101 changes, height information for generating a three-dimensional map is calculated. This is effective when the capacity of the storage medium provided in the map display terminal is small or when the capacity of the usable storage medium is limited.

<Functional configuration of map display terminal>
As shown in FIG. 5, the map display terminal 101 according to the present embodiment is connected to the map server 200, and the position information acquisition unit 110, the map information acquisition unit 120, the map information storage unit 141, and the detection unit. 150, a three-dimensional map information calculation unit 131, a three-dimensional map generation unit 160, and a display unit 170. In addition, about the component which attached | subjected the code | symbol same as 1st Embodiment, since it has the same function, the detailed description is abbreviate | omitted.

  The map information storage unit 141 stores the two-dimensional map acquired by the map information acquisition unit 120 and the position information and height information of the building on the acquired two-dimensional map. When the map information acquisition unit 120 acquires the building shape and hierarchy information along with the position information and height information of the building on the two-dimensional map, the map information storage unit 141 also stores these information. . Further, the map information storage unit 141 stores the tilt angle detected by the detection unit 150.

  The three-dimensional map information calculation unit 131 includes a tilt angle detected by the detection unit 150, position information of the current location acquired by the position information acquisition unit 110, and a building on the two-dimensional map stored in the map information storage unit 141. Based on the position information and height information, height information for displaying a three-dimensional map is calculated. The three-dimensional map information calculation unit 131 calculates height information for three-dimensional map display every time the detection unit 150 determines that the inclination angle of the map display terminal 101 has changed.

  Therefore, according to the present embodiment, the user determines the three-dimensional level of the three-dimensional map according to the inclination of the map display terminal 101 arbitrarily set by the user, and generates the three-dimensional map at the determined three-dimensional level. It is easy to provide a 3D map that is easy to see, and makes it easy to match the landscape in front of the eye with the 3D map. Further, by calculating the height information for three-dimensional map display every time the tilt angle of the map display terminal 101 is detected, the storage medium provided in the map display terminal 101 can be used when the capacity of the storage medium is small. This is effective when the capacity of the medium is limited.

  The map display terminal of the present invention can be realized by recording the processing of the map display terminal on a computer-readable recording medium, reading the program recorded on the recording medium into the map display terminal, and executing the program. . The computer system here includes an OS and hardware such as peripheral devices.

  Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW (World Wide Web) system is used. The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.

  The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

  The embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments, and includes designs and the like that do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 100 Map display terminal 110 Position information acquisition part 120 Map information acquisition part 130 3D map information calculation part 140 Map information storage part 150 Detection part 151 Inclination angle detection part 152 Direction detection part 160 3D map generation part 170 Display part 200 Map server

Claims (7)

A map display terminal that communicates with a map server that stores a two-dimensional map and position information and height information of a building on the two-dimensional map,
Location information acquisition means for acquiring location information of the current location of the terminal;
Map information acquisition means for acquiring, from the map server, a two-dimensional map around the current location and the location information and height information of the building on the two-dimensional map based on the acquired location information of the current location. When,
3 for each predetermined angle set in advance as an elevation angle from the ground surface based on the position information and height information of the building on the acquired two-dimensional map and the acquired position information of the current location. 3D map information calculating means for calculating height information for generating a 2D map;
Map information storage means for storing the acquired 2D map and the calculated height information for generating the 3D map;
Detecting means for detecting an inclination angle of the terminal and a direction in which a specific surface of the terminal is facing;
The height information for generating the three-dimensional map of the elevation angle corresponding to the detected inclination angle is acquired from the map information storage means, the acquired height information for generating the three-dimensional map, the acquired two-dimensional map, And 3D map generation means for generating a 3D map of the detected direction based on the detected direction;
A map display terminal characterized by displaying a generated three-dimensional map. The map information storage means stores an inclination angle that has not changed for a predetermined time when the detection means does not detect a change in inclination angle for a predetermined time;
The three-dimensional map information calculation means calculates height information for generating a three-dimensional map using the stored inclination angle as an elevation angle from the ground surface when an inclination angle is stored in the map information storage means. The map display terminal according to claim 1, wherein:   3. The map display terminal according to claim 2, wherein the map information storage unit deletes the stored tilt angle when the detection unit continues to detect a change in the tilt angle for a predetermined time. .   The said map server memorize | stores the shape of the building on the said two-dimensional map with the said two-dimensional map and the positional information and height information of the building on the said two-dimensional map. The map display terminal described in any one. A map display terminal that communicates with a map server that stores a two-dimensional map and position information and height information of a building on the two-dimensional map,
Location information acquisition means for acquiring location information of the current location of the terminal;
Map information acquisition means for acquiring, from the map server, a two-dimensional map around the current location and the location information and height information of the building on the two-dimensional map based on the acquired location information of the current location. When,
Map information storage means for storing the acquired 2D map and the position information and the height information of the acquired building on the acquired 2D map;
Detecting means for detecting an inclination angle of the own terminal and a direction in which a specific surface of the own terminal faces;
Based on the position information and the height information of the building on the acquired two-dimensional map, and the acquired position information of the current location, height information for generating a three-dimensional map of the detected inclination angle is calculated. 3D map information calculating means for
3D map generation means for generating a 3D map in the detected direction based on the calculated height information for generating the 3D map, the acquired 2D map, and the detected direction;
A map display terminal characterized by displaying a generated three-dimensional map. Communicates with a map server that stores a two-dimensional map and position information and height information of a building on the two-dimensional map, and acquires position information acquisition means, map information acquisition means, three-dimensional map information calculation means, and map information storage A map display method in a map display terminal comprising means, detection means, and 3D map generation means,
A first step in which the location information acquisition means acquires location information of the current location of the terminal;
Based on the acquired location information of the current location, the map information acquisition means obtains the two-dimensional map around the current location, the location information and the height information of the building on the two-dimensional map, and the map server. A second step obtained from
The three-dimensional map information calculation means is preset as an elevation angle from the ground surface based on the position information and height information of the building on the acquired two-dimensional map and the acquired position information of the current location. A third step of calculating height information for generating a three-dimensional map for each predetermined angle;
A fourth step in which the map information storage means stores the acquired 2D map and the calculated height information for generating the 3D map;
A fifth step in which the detecting means detects an inclination angle of the terminal and a direction in which a specific surface of the terminal is facing;
The 3D map generation means acquires height information for generating a 3D map of the elevation angle corresponding to the detected tilt angle from the map information storage means, and acquires the acquired height information for 3D map generation; A sixth step of generating a three-dimensional map of the detected direction based on the acquired two-dimensional map and the detected direction;
A map display method comprising: displaying a generated three-dimensional map. Communicates with a map server that stores a two-dimensional map and position information and height information of a building on the two-dimensional map, and acquires position information acquisition means, map information acquisition means, three-dimensional map information calculation means, and map information storage A program for executing a map display method in a map display terminal comprising means, detection means, and 3D map generation means,
A first step in which the location information acquisition means acquires location information of the current location of the terminal;
Based on the acquired location information of the current location, the map information acquisition means obtains the two-dimensional map around the current location, the location information and the height information of the building on the two-dimensional map, and the map server. A second step obtained from
The three-dimensional map information calculation means is preset as an elevation angle from the ground surface based on the position information and height information of the building on the acquired two-dimensional map and the acquired position information of the current location. A third step of calculating height information for generating a three-dimensional map for each predetermined angle;
A fourth step in which the map information storage means stores the acquired 2D map and the calculated height information for generating the 3D map;
A fifth step in which the detecting means detects an inclination angle of the terminal and a direction in which a specific surface of the terminal is facing;
The 3D map generation means acquires height information for generating a 3D map of the elevation angle corresponding to the detected tilt angle from the map information storage means, and acquires the acquired height information for 3D map generation; A sixth step of generating a three-dimensional map of the detected direction based on the acquired two-dimensional map and the detected direction;
A program that causes a computer to execute.

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