KR20040021857A - Method of a scale-up/scale-down display in GPS phone - Google Patents

Abstract

PURPOSE: A method for displaying a map in a GPS terminal is provided to display position information and various positions in the GPS terminal with various scales by adjusting scales of the map displayed in the GPS terminal. CONSTITUTION: A scale of a map displayed in a GPS terminal is determined by a user and the determined scale is transmitted into a GIS(Geographic In Server having map data)(S310). Then, the GIS transmits map data corresponding to the determined scale so that a map is displayed in the GPS terminal(S320). Position information is simultaneously displayed in the GPS terminal together with the map if the user requests position information(S330,S340). When determining the scale of the map, the user firstly selects a predetermined position and selects the scale displayed in a display window.

Description

How to zoom in and out of a map on a GPS device {Method of a scale-up / scale-down display in GPS phone}

The present invention relates to a method of enlarging / reducing a map by using a menu item for zooming a map displayed with a map on a GPS terminal display window.

Currently, PDA (Personal Digital Assistant), PCS (Personal Communications Services) phone, mobile phone companies are providing location information service using base station, but it is only used to use additional service of wireless communication device because it is not dedicated device.

As a result, the fee is expensive and does not provide the exact location where the user is located. This is because it is possible to inform only a predetermined area where the user is located, and it is not possible to use it at all in rural areas or remote areas without a base station. In order to solve this disadvantage, a location tracking system using GPS has been introduced.

The Global Positioning System began to be developed by the US Department of Defense in the early 1970s and began operation in the mid-1990s. The satellite positioning system is the most ideal navigation system that can be used throughout the earth regardless of time or weather conditions.It was originally developed for military use, but it has been rapidly expanded to civilian use due to its economic and usefulness. Is situated.

For example, the GPS terminal itself is equipped with a GPS receiver for checking the current position and the moving speed or determining the moving path. The GPS receiver receives radio waves representing latitude, longitude, altitude, etc. from three or more satellites located in six mid-tracks and calculates the current position of the GPS terminal. do.

Accordingly, the GPS terminal synthesizes the information of the calculated current position into pre-stored map information, the direction of the terminal as well as the direction of the terminal, the distance to the destination, the current speed of the terminal, the path set before the user moves, It is possible to provide the user with various information necessary for driving, such as road information and a recommended route to the destination.

On the other hand, the above map information may be stored in the GPS terminal itself, but since the corresponding map is displayed in 3D graphics or due to various amounts of information on the corresponding map, a lot of storage capacity is required, and thus the GPS terminal stores the map data. The map data can be received and displayed from a Geographic Information System (GIS) server.

1 is a state diagram showing the operation between the GPS satellites, GPS terminal, the base station to display the map using the GIS server.

The GPS satellite 100 continuously transmits a navigation message necessary for calculating a position to a user through a carrier wave. The carrier is precisely tuned to the frequency of a particular band and transmitted to the user.

The GPS terminal 110 may receive a GPS satellite signal to calculate a location, or to accomplish other specific purposes, which calculates the location and speed of the user using the navigation data received from the satellite. In addition, the terminal can use GPS antennas and built-in algorithms to track GPS satellite signals, obtain information about the location, and display them in a short time.

The base station 120 includes a communication server 121 for establishing a wired / wireless communication channel for transmitting and receiving information data and a call with a general terminal, and a geographic information system (GIS) server 122 for storing and outputting map data to be transmitted to a user. do. When the GIS server 122 receives the information data for the specific location from the GPS terminal 110, the corresponding map data is transmitted to the terminal. Of course, if there is a space for storing map data in the GPS terminal, the GIS server is not necessary here.

On the other hand, when the GPS terminal receives and displays the map data from the GIS server, there are some problems in using the displayed map.

First, since the displayed map is displayed according to a predetermined scale factor, there is a problem in that the user does not have a function for supporting a specific location in detail.

Secondly, location information such as latitude, longitude, and sea level for a specific location does not appear.

Accordingly, the present invention has been proposed to solve the above problems, and an object of the present invention is to display specific positions in various scale ranges by allowing the scale of the map displayed on the GPS terminal to be adjusted. In addition, by displaying the location information, such as latitude, longitude, and the like for a specific location on the map with the map, the purpose of the effective location tracking.

1 is a state diagram showing an operation state between a GPS satellite, a GPS terminal, and a base station supporting a GPS terminal as a prior art.

2 is a block diagram illustrating an internal configuration of a GPS terminal for receiving and displaying a map of a specific scale ratio in a GIS server according to the present invention.

3 is a flowchart illustrating an algorithm in which a GPS terminal displays maps of various scale ratios according to a user's selection according to the present invention.

4 and 5 are screen diagrams showing the implementation of a method of enlarging / reducing a map displayed on a GPS terminal.

6 is a screen diagram showing location information together with a map.

* Description of the symbols for the main parts of the drawings *

S310: Set map scale S320: Send scale information

S330: Receive and display map data S340: Request location information

S350: Receive and display location information

In order to achieve the above object, the GPS terminal includes a GPS receiver, a screen display unit, a key input unit, an RF transmitter, and a digital modulator. In particular, a direction key and a confirmation key of the key input unit are used to position the cursor on the map, and a zoom menu item is provided on the display window to set the map scale ratio.

The GPS terminal includes a map scale setting step of receiving a scale of a map displayed on the GPS terminal from a user and transmitting it to a map information system (GIS) server in which map data is stored for the map scale, and a map suitable for the scale. A map display step of receiving data from the map information system and displaying a corresponding map, and a location information display step of displaying location information on a specific location together with the displayed map when a user requests.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram illustrating an internal configuration of a GPS terminal for receiving and displaying predetermined scale ratio map data from a Geographical Information System (GIS) server according to the present invention.

On the other hand, the map can be displayed without receiving the map data from the GIS server, which is provided with a map data storage in the terminal itself receives the map data from it. Therefore, in this case, the map data storage unit must be additionally added to the GPS terminal block diagram of FIG. 1.

The GPS receiver 220 receives an information signal about a current location of the terminal from the satellite. The GPS receiver converts the position information signal, which has calculated the position of the terminal based on the received information signal, into a hexadecimal code suitable for processing by the digital modulator.

The digital modulator 250 receives the terminal information signal transmitted from the GPS receiver, modulates the signal into a signal capable of radio wave radiation, and transmits the signal to the RF transmitter. That is, the digital modulator amplifies the terminal information signal into a high frequency signal and transmits the radio signal to the RF transceiver.

The RF transceiver 240 receives a terminal transmission signal modulated by the digital modulator and radiates radio waves to the space through the terminal antenna. In addition to receiving voice call signals from the base station, it receives map data and location information of the corresponding location from the GIS server in the base station.

The screen display unit 210 is a place for displaying various images and texts to the user, and displays the map and corresponding location information received from the RF transceiver.

The key input unit 230 includes a direction key to position the cursor appearing on the screen display in a specific area on the map. In addition, a predetermined key for selecting a zoom / information menu item displayed on the display window is provided. Such a method of using the function key will be described with the flowchart in FIG. 3.

The control unit 200 controls each of the above functional units, and functions to provide an optimal algorithm for the GPS terminal to smoothly communicate with the satellite and the base station.

3 is a flowchart illustrating an algorithm in which a GPS terminal displays maps of various scale ratios according to a user's selection according to the present invention.

First, the user sets the map scale of the current location or the location to be examined (S310). To set the scale of the map, place the cursor on a specific part of the map displayed on the display window and press the OK key on the key input section to display enlargement, reduction and selection of information on the point where the cursor is placed.

For example, when a map of Seongdong-gu, Seoul is displayed on the display window, the cursor is positioned at the position of the user's search using the direction key of the key input unit. If the user wants to enlarge or reduce the map near Hanyang University located in Seongdong-gu, the user places the cursor 400 on the Hanyang University using the direction keys and then presses the OK button on the key input unit. The menu items 410, reduction 420, and information 430 are displayed. After that, when the user wants to enlarge the area where the cursor is located, press the 1 key of the key input unit to select the enlargement, and the map scale setting is completed. Meanwhile, although the menu item is displayed at the bottom of the screen display unit in FIG. 4, the menu item may be displayed in the pop-up menu format.

When the enlargement / reduction is set for a specific location on the current map as described above, the terminal transmits the enlargement / reduction information set through the RF transceiver to the base station (S320). The base station sends the map data having the corresponding scale ratio to the terminal according to the received enlargement / reduction information, and the terminal displays the map based on the received map data (S330). For example, when the cursor is placed on the Hanyang University and the zoom button is pressed, as shown in FIG. 4, the terminal sends a map enlargement request to the base station, and the base station sends the enlarged map data to the terminal so that the terminal near the Hanyang University as shown in FIG. 5. Along with the enlarged map, a menu of zoom 510, zoom 520, and information 530 is displayed. If you want to look at the enlarged map again, place the cursor on a specific location and select the enlarged menu displayed on the display window. The above-described map scale setting (S310), scale information transmission (S320), and receiving and displaying map data (S330) Display a more enlarged map via. If there is no enlarged map data, when displaying the final enlarged map, only the reduced and information menus are displayed except the enlarged menu.

After the map is displayed for a specific region through the above process, location information on latitude, longitude, sea level, etc. for a specific location can be determined. That is, when the user selects the information (430, 530) item among the displayed menu items by placing the cursor at a specific location, the terminal requests the base station for location information such as latitude, longitude, and sea level for the corresponding location (S340). The base station receiving the request for providing location information from the terminal transmits the corresponding location information to the terminal, and the receiving terminal displays the received location information on the terminal display window together with the map (S350).

For example, if the user selects the information 530 item by placing the cursor 500 on the Hanyang University in FIG. 5, the terminal displays location information such as latitude, longitude, and the sea level of the Hanyang University area on the bottom 610 of the map as shown in FIG. 6. Do it. The user can use the location information to know the exact geographic characteristics of the location, it is useful to perform the location search.

On the other hand, if there is a map data storage unit in the GPS terminal, since the information can be processed in the terminal itself without having to send the information to the base station when zooming in / out a specific location, take the map data of the corresponding scale ratio in the map data storage unit It is obvious that you can come and display it in the display window. As a result, it should be recalled that the flowchart shown in FIG. 3 is a flowchart showing an algorithm when the map data storage unit is not received in the GPS terminal and the map data is received from the GIS server in the base station.

Although the technical spirit of the present invention has been described in detail according to the above-described preferred embodiment, the above-described embodiment is for the purpose of description, and various ordinary embodiments of the present invention may be made by those skilled in the art. I can understand.

As described above, the present invention provides a method of enlarging / reducing a scale ratio of a map displayed on a GPS terminal, thereby enabling a more efficient location search than a map display of a conventional GPS terminal, thereby increasing user convenience. It has the effect of improving the GPS environment. In addition, by displaying the location information, such as latitude, longitude, sea level, etc. for a specific location on the map, it is possible to efficiently search the location using the GPS terminal.

Claims (6)

A map scale setting step of setting a scale of a map displayed on a GPS terminal from a user and transmitting the set contents to a map information system (GIS) server in which map data is stored; A map display step of receiving map data corresponding to the scale from a map information system and displaying a corresponding map; Location information display step of displaying the location information for a specific location with the map displayed above when the user requests Method for displaying a zoom on the map on a GPS terminal having a. The method of claim 1, wherein the map scale setting in the map scale setting step comprises: A method of zooming in and out of a map on a GPS terminal, characterized in that for setting a map scale by selecting a specific location and then selecting an enlargement or reduction item displayed on a display window. The method of claim 2, wherein the method of selecting a specific location comprises: 12. A method of enlarging / reducing a map on a GPS terminal, wherein the cursor is positioned in a specific area by using a direction key of a key input unit and then a confirmation key is pressed. The method of claim 1, wherein the location information display is: Requesting location information from a map information system (GIS) server when a user requests to display location information of a specific location on a map, Displaying location information received from the map information system together with a map; Method of displaying by zooming in / out on the map on the GPS terminal comprising a. The method of claim 4, wherein the user's request is If the user selects the information item displayed on the display window after placing the cursor at a specific location on the map to know the location information, the map is enlarged / reduced on the GPS terminal, characterized in that the location information request for the corresponding cursor location is recognized. How to display. The method according to claim 1 or 4, wherein the location information is latitude, longitude, and elevation at the corresponding location.