KR100461850B1 - A searching System for position information and the method for the same - Google Patents

Abstract

PURPOSE: A global positioning system and a method thereof are provided to reduce search error by changing search range of position information efficiently through controlling a search area according to a traveling direction of a vehicle. CONSTITUTION: A receiver(22) receives position information of a present vehicle from a GPS satellite. A connection unit(21) with an external computer(10) receives position information of a guide target. A position information storing unit(24) stores the transmitted position information. A guide information storing unit(25) stores guide information provided in correspondence to the position information stored in the position information storing unit. A control unit(26) guides the guide target of corresponding information after searching position information of the guide target. And an output unit(27) outputs guide information by the control unit. The position information of the guide target includes tag information given to each divided area of the whole area of the guide target. The control unit searches only the area including the guide target using the tag information.

Description

{A searching System for position information and the method for the same}

The present invention relates to a terminal for providing location information of a guide object using GPS information. After obtaining and digitizing the position information of the guide object as latitude and longitude coordinate values, the guide object is sorted in ascending or descending order. A structure that sequentially classifies the location according to the latitude and longitude, and divides the entire area to be guided by the GPS terminal into a predetermined area by latitude and longitude, and then includes an area including the guide objects sequentially classified according to the location as described above. After the classification, each unique tag information is added and stored in the location information storage unit of the GPS terminal, and the GPS target receives the GPS signal to select the search target search area according to the current location of the vehicle, the moving speed of the vehicle, and the direction of travel. And tag information stored in the location information storage unit of the GPS terminal is added to the selected search area. The first is related to search, and to speed up searches through the efficient search by excluding the unnecessary expansion of the search region by searching the guide object in the region corresponding to the search tag information, location information retrieval system and the location information searching method.

In general, the GPS (Global Positioning System) is a global radio navigation system using satellites developed by the US Department of Defense.It began operation in 1993 and officially started operation in 1995. It is resistant to measurement and 24/7 continuous service, weather conditions, interference and interference, and has unlimited use.

The GPS is equipped with a cesium atomic clock and a rubidium clock, respectively, to maintain precise time, and a unique code of PRN (Pesudo Random Noise) is generated for each satellite to easily distinguish satellites according to the code.

There are a total of 24 satellites, including 21 operating satellites and three reserve satellites, rotating around the Earth at an orbital period of about 12 hours.

The GPS uses the principle of triangulation, which determines the position of an unknown point by measuring the length of two sides between the points the user wants to know.

The distance from the satellite to the receiver is obtained by measuring the time difference between the time of generation and the time of reception of the code signal generated by each satellite and multiplying the measured value by the speed of light.

In addition, it is combined with Geographic Information System (GIS), which enables users to easily view the information on the map by using a terminal by storing a map in a storage medium, and detects and confirms their location. The technology of the navigation system, which makes it easy to find the distance to the location and the shortest distance, is rapidly developing and commercialized.

On the other hand, the terminal using the GPS must receive the signal of the GPS satellites to determine the current position of the current, and also to quickly search and provide the location information of the guide object to be guided as it moves.

That is, in order to quickly provide the location information of the guide object as described above, a method for quickly searching the location information of the guide object to be guided in the GPS terminal should be provided.

In the case of the existing GPS terminal, not only the location information of the guide object is systematically classified and stored, but also the search speed does not interfere when the type or number of guide objects is small by performing a comparative search for all the guide objects. Unlike in the prior art, the number of guide objects increases throughout the country in the thousands to tens of thousands or more, and the same method as the conventional GPS terminal takes a lot of time to search for tens to tens of thousands of cases, especially when the vehicle moves quickly. There is a problem that it is difficult to provide the location information.

Therefore, the present invention was made in view of the above-mentioned problems of the prior art, and in computerizing the location information of the guide object through a computer,

In order to increase the search speed of the guide object, the coordinate values of the position information of the guide object acquired by latitude and longitude are digitized, and then sorted in ascending or descending order of latitude and longitude, and sorted sequentially so as to be easily searchable according to the position.

In addition, after dividing the entire area to be guided by the GPS terminal into a predetermined area by latitude and longitude, and after dividing the area including the location information of the guide objects sequentially classified as described above, by adding unique tag information After storing the location information storage unit of the GPS terminal, select the search target area according to the signal received from the GPS receiver, and first search the area containing the location information of the guide object to which the tag information is added in the search target area In other words, by searching only the guide objects in the area corresponding to the retrieved tag information, a wasteful search process such as searching the entire guide object or a region without the guide object is excluded.

In addition, in selecting the search target area according to the signal received from the GPS receiver as described above, the unnecessary search target area is removed in consideration of the current position of the vehicle, the vehicle speed, and the moving direction, and an efficient search target area is designated to speed up the search. To provide a way to increase the.

1 is a diagram illustrating an internal configuration of a GPS terminal and a connection system with a computer according to the present invention.

2 is a diagram illustrating a method of dividing a guide object (South Korea) according to the present invention.

3 is an exemplary view of a region dividing method including tag information according to the present invention.

4 is a diagram for retrieving location information of a guide object according to the present invention;

5 is another embodiment of searching for location information of a guide object according to the present invention;

6 is a flowchart illustrating a search method using tag information according to the present invention.

7 is an exemplary diagram when the vehicle movement direction according to the present invention is the north-south direction

8 is an exemplary view when the vehicle movement direction according to the present invention is the east-west direction

9 is an exemplary view when the vehicle movement direction according to the present invention is a composite form of FIGS. 7 and 8

Explanation of symbols on the main parts of the drawings

10 computer 20 GPS terminal

21: connection part 22: receiving part

23: input unit 24: location information storage unit

25: guide information storage unit 26: control unit

27: output unit

When described with reference to the accompanying drawings in order to achieve the object of the present invention.

1 is a configuration of a GPS terminal and a connection system with a computer according to the present invention.

According to FIG. 1, the GPS terminal 20 receives location information from a GPS satellite, compares the received location information with location information of the stored guide object, and provides the GPS information to the GPS terminal 20. It consists of a computer 10 for transmitting the processed position information of the guide object including the tag information.

The GPS terminal receives a signal provided from a connection unit 21 for connecting with the computer 10, an input unit 23 for controlling the operation of the GPS terminal, and a GPS satellite, and uses the current position information of the vehicle as the coordinates and direction of travel. A receiver 22 for detecting a back, a position information storage 24 for storing position information data processed from a computer, and guide information such as voice, text, and image for guiding the position information data. The guidance information storage unit 25 and the current position information of the vehicle recognized by the signal provided by the GPS satellites according to the built-in program processor and the guidance when matching by comparing the position information stored in the position information storage unit 24 The control unit 26 controls the output of the guide information stored in the information storage unit 25, and the output unit 27 for outputting the guide information by the control unit 26.

The computer 10 is configured to perform a machining operation with a database file to which tag information is added so that a user can easily search for location information on a guide object to be guided.

The operation description according to the above configuration is as follows.

First, a process of generating a database file to which tag information is added to guide information to be provided to the GPS terminal 20 through the computer 10 is performed.

In other words, the existing location information data is classified firstly according to items such as location information of a dangerous area such as an accident bundle or a sudden curve and location information of a service guide area such as an interchange, a junction, or a toll gate.

The classification allows simpler or more complex classification according to the convenience of the operator.

On the other hand, the location information data of the existing guide object having the latitude and longitude coordinate values (expressed in degrees, minutes, seconds) for latitude and longitude coordinates throughout the country as shown in Table 1 to apply to the present invention Divide the value into 1-degree unit intervals, subdivide it into 1/10 second units, and convert it to a numerical value.

Hardness 1/10 second conversion value Latitude 1/10 second conversion value 124 degrees 4464000 33 degrees 1188000 125 degrees 4500000 34 degrees 1224000 126 degrees 4536000 35 degrees 1260000 127 degrees 4572000 36 degrees 1296000 128 degrees 4608000 37 degrees 1332000 129 degrees 4644000 38 degrees 1368000 130 degrees 4680000 39 degrees 1404000 131 degrees 4716000 40 degrees 1440000 132 degrees 4752000 41 degrees 1476000 42 degrees 1512000 43 degrees 1548000 44 degrees 1584000

Since one degree of latitude and one longitude is 3600 when converted into one second unit, the converted value of one degree when converted into units of 1/10 second is 36000.

Therefore, as shown in Table 1, the converted numerical values of the location information of the guide object having the latitude 33 degrees and the longitude 124 degrees are converted into 1188000 seconds and 4464000 seconds.

The location information of the guide object that has undergone the above conversion process is converted into numerical values of latitude and longitude, and additionally adds attributes such as speed limit information and direction angle actually measured.

The location information to which attributes of the guide information (such as speed information and direction angle) are added is arranged in ascending order according to latitude, and then again in ascending order according to longitude to have a sequential sorting order.

The ascending sorting according to latitude and longitude is one embodiment of a sequential sorting order, and other methods such as descending sorting may be applied.

As described above, location information arranged in ascending order according to latitude and longitude is divided into a predetermined area size.

2 is an embodiment of dividing the entire country into predetermined regions according to latitude and longitude.

As described above, FIG. 2 divides a country having a latitude of 33 degrees to 44 degrees, a longitude of 124 degrees to 132 degrees into a rectangular region having a size of a predetermined area according to latitude and longitude, ie, latitude and longitude, respectively, 1 degree. In addition, a specific tag such as a 'first tag region' and a 'second tag region' is added to the divided regions to form a database to be guided.

By adding the unique tag, the location information of the guide object of the database file having the divided location information is combined with the GPS terminal and stored in the location information storage unit 24.

3 is a diagram illustrating an embodiment in which a target area to be guided is divided into predetermined areas according to the present invention, and a location tag of the guide object is classified by adding a unique tag to the divided predetermined area.

As shown in FIG. 3, a point displayed on the map indicates location information of a guide object to be guided and may be displayed as a coordinate value composed of latitude (x) and longitude (y).

That is, when the coordinate values of the position information of the guide object to be guided in FIG. 3 are arranged regardless of the order, the coordinate values obtained from the upper left to the lower right are (x4, y3), (x5, y4), ( x3, y6), (x7, y6), (x4, y8), (x6, y9), (x3, y11), (x7, y12).

In the present invention, the coordinate values of the guide objects listed regardless of the order are sorted according to latitude and longitude. That is, the coordinate values obtained by first sorting the latitude and then secondarily sorting the longitude are ( x3, y6), (x3, y11), (x4, y3), (x4, y8), (x5, y4), (x6, y9), (x7, y6) and (x7, y12).

In the aligned state, the maps showing the latitude (x) and the longitude (y) of FIG. 3 are divided into predetermined regions, respectively, and each has a unique tag such as 'first tag region', 'second tag region', and the like. appointed? Classify.

In FIG. 3, the latitude x is set as 5 units and the longitude y is set as 6 units, and one region is added, and unique tag information is added to each divided region.

That is, when the aligned coordinate values of FIG. 3 are divided into predetermined regions, the location information data region in which the latitude region is (x1 to x5) and the longitude region belongs to (y1 to y6) is called 'first tag region'. In this case, the first tag region includes coordinate values of (x3, y6), (x4, y3), and (x5, y4).

The second tag region is a location information data region in which the latitude region is (x1 to x5) and the longitude region belongs to (y7 to y12), and the coordinate values of (x3, y11) and (x4, y8) correspond to this. do.

The 'third tag region' with latitude region of (x6 to x10) and longitude region of (y1 to y6) contains coordinate values of (x7, y6), latitude region of (x6 to x10) and longitude region of ( Coordinate values of (x6, y9) and (x7, y12) correspond to the 'fourth tag region', which is an area of y7 to y12).

As described above, after adding additional information necessary for guiding direction angle, property, etc. to the position information to which the tag information including the coordinate value of the guide object is added according to the division of the predetermined area, it is generated as a database file and the GPS terminal 20 To be stored in the location information storage unit 24 through the connection portion 21 of the.

The location information of the guide object stored in the location information storage unit 24 of the GPS terminal 20 is classified into tag information as shown in Table 2 below and has a direction angle and an attribute as additional information. do.

Tag Information ID Latitude Hardness Direction angle property 1st tag 001 1368000 4572000 10 camera 1st tag 002 1371500 4675600 20 gas station 1st tag 003 1375200 4680200 30 restaurant 2nd tag ... ... ... ... ...

In the above description, the ID and attribute are approximately 4 bits, the latitude and longitude are approximately 4 bytes, and the direction angle is approximately 1 byte. Such reduction and addition of the capacity can be easily changed according to the type of additional information item according to the creation of the database file. Can be.

Meanwhile, the tag information and the location information according to the tag information are stored in the tag information storage area and the location information storage area in the location information storage unit 24 of the GPS terminal 20, respectively.

In the tag information stored in the tag information storage area, a memory address (address) of a location information storage area in which location information of a guide object is stored and a range of latitude and longitude values of a tag area divided into the predetermined area are stored together. This is to provide a quick and efficient retrieval service by providing only the tag information of the area including the location information of the guide object when providing the location information of the guide object to the user through the vehicle.

As the vehicle moves while the database including the tag information is stored in the location information storage unit 24 of the GPS terminal 20, the receiver 22 of the GPS terminal 20 receives a signal provided from a GPS satellite. To obtain the coordinate information of the position information of the current vehicle.

The control unit 26 of the GPS terminal 20 is stored in the tag information storage area of the location information storage unit 24 through the coordinate values constantly acquired from the GPS satellites to the GPS terminal 20 receiver 22 according to the movement of the vehicle. The stored tag information is searched and the current vehicle is located.

The area where the current vehicle belongs is identified and the corresponding tag information is searched in the tag storage area of the location information storage unit 24 so that only the location information related to the tag information is searched in the location information data storage area.

When searching for the location information of the guide object that is located at a certain distance after searching the location information of the current vehicle, the distance table according to the latitude and longitude of Table 3 below and the distance table according to the vehicle speed of Table 3 will be described above. The distance to the guide is calculated first.

Latitude and longitude Longitude / distance (m) Latitude 0.1 sec 2.44m 3.00m 1 sec 24.4m 30.0mm 10 sec 244m 300 m 100 sec 2440m 3000m 0.001 minutes 1.464m 1.8m 0.01 min 14.64m 18.0m 0.1 minutes 146.4m 180.0m 1 minute 1464 m 1800.0m

Table 3 shows the distance difference according to the longitude and latitude, wherein 1 second indicated on the map is about 25 m in longitude, about 30 m in latitude, and 0.1 second is 2.44 m in latitude. The distance difference is 3.00 m.

km / h m / s km / h m / s km / h m / s km / h m / s 5 1.389 55 15.278 105 29.167 155 43.056 10 2.778 60 16.667 110 30.556 160 44.444 15 4.167 65 18.056 115 31.944 165 45.833 20 5.556 70 19.444 120 33.333 170 47.222 25 6.944 75 20.833 125 34.722 175 48.611 30 8.333 80 22.222 130 36.111 180 50.000 35 9.722 85 23.611 135 37.500 185 51.389 40 11.111 90 25.000 140 38.889 190 52.778 45 12.500 95 26.389 145 40.278 195 54.167 50 13.889 100 27.778 150 41.667 200 55.556

Table 4 is a value obtained by converting the driving distance according to the moving speed of the vehicle to the speed per second, and as shown in the above table, when the current vehicle moves at a speed of 5 km / h, the driving distance is converted to 1.389 m per second. Will be.

The reason for converting the latitude and longitude coordinate values into units of 0.1 seconds as described above is to store the location information storage unit 24 in order to make the best use of the storage capacity. At least about 20 bytes (byte) of storage capacity is required to store the data. However, in the case of the above-described storage, only 4 to 8 bytes of storage capacity are required, thereby increasing the utilization efficiency of the storage capacity.

In addition, when the latitude and longitude coordinate values are converted in units of 0.1 second, the position information of the guide object may be provided in detail by reducing the error range of the distance than the conventional GPS terminal provided in units of 1 second.

As shown in FIG. 4, when the current vehicle location information is checked, when the vehicle information is moved to search the location information of a guide object spaced at a certain distance, for example, 600 m, the location information identified in the current vehicle and the moving speed of the vehicle are shown. According to the value converted in Table 4 to determine the area (region) containing the guide object.

Since GPS data is received at regular intervals (for example, 1 second), if the vehicle moves at a high speed, an error in the position of the vehicle may occur as far as the moving distance of the vehicle while receiving the position data from the satellite, thereby detecting the area to be searched ahead. This is because the error must be corrected in setting.

As the region (area) including the guide object is identified, the corresponding tag information is retrieved from the location information storage unit 24 of the GPS terminal, and the corresponding information stored in the location information storage unit 24 is searched according to the retrieved tag information. The location information is obtained.

The control unit 26 of the GPS terminal 20 loads the corresponding guide information stored in the guide information storage unit 25 according to the acquired location information of the guide object to provide the user to the user through the output unit 27. do.

FIG. 4 is a diagram illustrating a process of searching for a guide object at a predetermined distance in a state in which a current position is determined using a signal received from a GPS satellite to a receiver 22 of a terminal while driving a vehicle.

In the state where the location information of the guide object is divided into tag information and location information and stored in the location information storage unit 24 of the GPS terminal 20, as shown in FIG. 4, a predetermined distance is 600 m as the vehicle moves. When searching for a guide object within a radius, tag information of an area within a radius of 600 m is first searched from the position information of the current vehicle according to Table 3 and Table 4 in consideration of the position information of the current vehicle and the moving speed of the vehicle.

According to the search, the location information of the guide object in the location information storage area of the location information storage unit 24 of the GPS terminal 20 is searched from the tag information of the corresponding area.

That is, compared to the conventional GPS terminal searching all of the location information of the guide object, the location information of the guide object is classified into a predetermined area to search for additional tag information, and the location information of the guide object in the area corresponding to the tag information. It can be seen that the search is quick and efficient.

On the other hand, in assigning the tag information, the area is divided at regular latitude and longitude intervals, but the tag information is assigned only to the area where the guide object actually exists, and the search target area is not given to the area where the guide object does not exist. It needs to be minimized. That is, in FIG. 4, since the guide objects exist only in three areas within a radius of 600 m with respect to the vehicle, tag information is assigned only to these three areas, and tag information is omitted in the area without the remaining guide objects. This is because the detailed search in the target area enables accurate location search for the target guide object even if only three tag areas are performed.

5 is another embodiment according to the present invention, when searching for a guide object near a distance of 5 km ahead of a predetermined distance in a state where the current position of the vehicle is known, as shown in Table 3 and Table In step 4, the tag information of the area belonging to the position of 5 km ahead is searched first from the current vehicle position according to the traveling direction and the direction angle of the vehicle, and the location information of the guide object in the area classified from the corresponding tag information is retrieved. do.

6 is a flowchart illustrating a method of searching for location information of a guide object using tag information according to the present invention.

A signal transmitted from a GPS satellite as the vehicle moves in a state in which a database file of the position information of the guide object processed by the computer is stored in the position information storage unit 24 through the connection unit 21 of the GPS terminal 20. Is received through the receiver 22 of the GPS terminal 20 to check the current position coordinate value and the direction of travel first.

As the current position coordinate value and the moving direction of the vehicle are confirmed, position information associated with tag information to which the current vehicle belongs is provided.

In response to an operation of the input unit 23 of the GPS terminal 20 installed in the vehicle, the controller 26 performs a task for searching for location information of a guide object in a preset area.

That is, in a situation where the current position coordinate value of the vehicle and the moving speed of the vehicle are known, the user checks whether the tag information on the location information of the guide object to be provided by the user exists in a predetermined area, for example, 600m. (200)

By way of example, the predetermined region of the preset guide object may be designated by the user through manipulation of the input unit 23 of the GPS terminal 20 or may be variably designated by vehicle speed and current location information.

That is, the control unit 26 of the GPS terminal 20 compares the position information received according to the movement of the vehicle with the position information of the guide object by the area designation, and determines the position information storage unit 24 of the GPS terminal 20. In the tag information storage area, it is determined whether there is tag information of a region corresponding to the location information of the guide object.

If the tag information of the corresponding area is present according to the determination result, it is determined whether the location information associated with the corresponding tag information exists in the location information storage area of the location information storage unit 24 (S300).

When the location information associated with the tag information is present in the location information storage area of the location information storage unit 24, the controller 26 loads the location information associated with the tag information of the corresponding area and then guides the storage unit 25. This will load the guide information corresponding to (S400).

That is, the controller 26 determines whether the location information corresponding to the latitude and longitude coordinate values exists and the location information of the guide object corresponding to the latitude and longitude coordinate values exists. The guidance information storage unit 25 of the GPS terminal is loaded with guidance information of a dangerous area such as a curve, service guidance and speed information such as an interchange, a branch point or a toll gate, and guidance information about a moving direction.

The guide information loaded from the guide information storage unit 25 is provided to the user through the output unit 27 (S500).

Meanwhile, in retrieving the location information of the guide object stored in the location information storage unit 24, tag information including the location information of the guide object in a designated area is displayed in the tag information storage area of the location information storage unit 24. If it is not present, the corresponding tag information is searched repeatedly. If the corresponding tag information exists according to a search result, the processes S400 to S500 are performed.

On the other hand, there is a method of extending the application of the above-described search method to efficiently search the position information of the guide object by varying the search range according to the moving direction of the vehicle.

As shown in FIG. 7, when the vehicle moves in the south or north direction, the range of longitude is constant while the range of latitude changes.

That is, the position information of the current vehicle is checked according to the signal received from the GPS satellite, and the vehicle is moving in the north-south direction according to the change in latitude coordinates generated as the vehicle moves. In the case of latitude increases according to the moving direction of the vehicle (actually, the front direction of the vehicle), the tag information is enlarged in the latitude direction, for example, the tag information area is expanded to display the position information of the corresponding guide object. Let's search.

In addition, as shown in FIG. 8, when the vehicle moves in the east or west direction, the latitude range is constant while the range of longitude changes.

In this case, the vehicle detects that the vehicle is moving in the east-west direction according to the change in the hardness coordinate value generated as the vehicle moves, and the controller 26 of the GPS terminal 20 increases the width of the hardness in accordance with the traveling direction of the vehicle ( Substantially, the tag information area of the tag information is enlarged in the direction of the front of the vehicle) so as to search for the location information of the corresponding guide object.

FIG. 9 illustrates a case in which the vehicle moves along the east-west or north-south direction. In this case, the position information of the current vehicle is checked according to a signal received from a GPS satellite, and latitude and longitude coordinates generated as the vehicle moves. The direction of movement of the vehicle is sensed according to the change of the value, and the control unit 26 of the GPS terminal 20 stores the tag information area in the range of 1 to 2 in the form of increasing latitude and longitude in accordance with the moving direction of the vehicle. Expand the degree to search the location information of the guide object.

The present invention not only reduces the storage capacity required for storing the location information of the guide object by digitizing the latitude and longitude coordinate values of the location information of the thousands to tens of thousands of guide objects, but also arranges the locations in ascending or descending order of the latitude and longitude. After the database is divided into sequential classifications, it is possible to determine whether or not the location information of the guide object according to the location is determined in a predetermined distance search target area calculated by GPS reception information when the vehicle moves, without searching the entire guide object. Efficient retrieval based on latitude and longitude location within the range of search area is possible.

In addition, by dividing the entire search target area into a certain area of latitude and longitude, and by adding the unique tag information to the area where the location information of the guide object, respectively, in a certain search target area calculated from the GPS receiver as the vehicle moves After determining the area where the guide object is located first through the tag information, the user can provide the guide object more quickly by searching only the location information of the guide object in the corresponding area.

In addition, it is possible to reduce the search error by effectively changing the search range of the location information by adjusting the search area according to the direction of travel of the vehicle.

Claims (6)

A receiver for receiving current location information of a vehicle from a GPS satellite, a connection with an external computer for receiving location information of a guide object, a location information storage for storing the received location information, and the location information storage part. A guide information storage unit for storing guide information provided corresponding to the stored location information, a controller for guiding a guide object of the corresponding information after searching for location information of the guide object, and an output unit for outputting guide information by the controller; In the terminal for providing guidance according to the location information of the guide object using a GPS, the location information of the guide object is arranged in sequence according to latitude and longitude, and then divided the entire area to be guided by the size of each area Tag information to which unique tag information is assigned for each divided region of the control unit; And searching only an area including the guide object using the information, and then guiding and outputting guide information corresponding to the guide object of the information to improve the search speed. The location information retrieval system according to claim 1, wherein the tag information is given only to a region where a guide object exists. The positional information retrieval system according to claim 1, wherein the positional information of the guide object further includes a numerical latitude and longitude coordinate value and direction angle and speed limit information to fit the road situation. A process of checking a current position coordinate value by receiving a signal transmitted from a GPS satellite according to the movement of the vehicle through a receiver of the GPS terminal while the position information of the guide object is processed and stored in the position information storage unit of the GPS terminal; ; Searching whether there is tag information for determining a divided area having location information of a guide object within a range corresponding to a preset distance from a current location of the vehicle; Searching whether the location information associated with the tag information exists in the location information storage unit as the tag information exists according to the search result; Loading corresponding location information in the control unit and loading corresponding guide information in the guide information storage unit when there is associated location information according to the search result; And providing guide information to a user through an output unit as the loading is performed. The method of claim 3, wherein after detecting the current position coordinates of the vehicle, the moving direction of the vehicle is sensed by comparing the coordinate values that change as the vehicle moves, and accordingly, the control unit of the GPS terminal moves toward the moving direction of the vehicle. And searching the tag information by enlarging the search area in the form of increasing the latitude or longitude width. The position information of claim 3, wherein the searching for whether the tag information exists in a region corresponding to a preset distance further comprises correcting an error according to current position information of the vehicle and a moving speed. Search method.