CN102096083B - Position encoding method, position encoding location and transmission method and position service terminal - Google Patents

Abstract

The invention discloses a position coding method, a position coding positioning and sending method and a position service terminal. The present invention provides a position coding method, comprising: determining coding precision; converting the latitude and longitude information into decimal coding according to the coding precision; converting the converted decimal coding into 34-decimal coding. The invention also provides a position code positioning and sending method and a position service terminal. By implementing the technical solution of the present invention, since the specific position is coded, the position information can be expressed more accurately.

Description

Location coding method, location coding positioning, sending method and location service terminal

technical field

The present invention relates to location service technology, more specifically, to a location coding method, a location coding location, a sending method and a location service terminal.

Background technique

Electronic map is a system of map making and application. It is a map generated by electronic computer control. It is a screen map based on digital cartography technology and a visualized real map. "Visualization on a computer screen" is the fundamental feature of an electronic map. The electronic map has the following six features: 1. It can be quickly accessed and displayed. 2. Animation can be realized. 3. Map elements can be displayed in layers. 4. Using virtual reality technology to make the map three-dimensional and dynamic, so that users have a sense of being there. 5. Using data transmission technology, the electronic map can be transmitted to other places. 6. Automatic measurement of length, angle, area, etc. on the map can be realized.

Electronic maps can easily combine and splice elements of ordinary maps in any form to form new maps. Any scale and any range of drawing output can be performed on the electronic map. It is very easy to modify and shorten the drawing time. It can be easily combined with other information sources such as satellite images and aerial photos to generate new map types. The information recorded on the digital map can be used to derive new data. For example, the contour lines on the map represent the topography, but it is difficult for non-professionals to understand. The digital elevation model can be generated by using the contour lines and elevation points of the electronic map, and the surface undulations Expressed in digital form, it can intuitively and three-dimensionally express landforms. It is impossible for ordinary topographic maps to achieve the performance effect.

The State Bureau of Surveying and Mapping currently has nationwide 1:4 million, 1:1 million, and 1:250,000 electronic maps, and will produce 1:50,000 electronic maps in the future. These are important components of the national basic geographic information system and other The carrier of professional information management and analysis of various departments. Provincial and municipal surveying and mapping and urban planning departments have produced a large number of large-scale electronic maps, such as 1:5000, 1:2000, 1:1000, etc., which can be used in many departments such as urban planning and construction, transportation, tourism, and car navigation. All these digital maps have changed the daily work of various departments from turning over a large pile of maps to work in front of the computer, which is scientific, accurate and intuitive, and greatly improves efficiency. There are many types of electronic maps, such as topographic maps, raster topographic maps, remote sensing image maps, elevation model maps, various thematic maps, and so on.

The working principle of GPS (Global Positioning System) is: the navigation device receives the position coordinates transmitted by at least 3 satellites among the 24 GPS satellites around the earth, and compares them with the position coordinates recorded in the electronic map stored by itself. Matching, in order to determine the exact position of the navigation object equipped with the navigation device in the electronic map. The navigation device can be a vehicle terminal, a portable navigator, a mobile phone terminal, and the like. Navigation objects can be vehicles, pedestrians, etc. After the user sets the starting point and the destination, the navigation device will calculate the navigation route, and navigate for the user according to the calculated navigation route.

In the prior art, location information is generally communicated to the other party through short messages or phone calls, but these methods cannot clearly express the location information, and the other party cannot clearly and accurately obtain the location information, nor can it accurately and quickly locate on the electronic map The location information passed.

Contents of the invention

The technical problem to be solved by the present invention is to provide a position coding method, a position coding positioning and sending method and a location service terminal for the above-mentioned defects of the prior art that cannot accurately locate. The method can accurately locate a specific location.

The present invention provides a position coding method, comprising:

Determine the encoding accuracy;

Converting longitude and latitude information into decimal codes according to the coding precision;

Convert the converted decimal code to the 34 code.

The thirty-quaternary code corresponds to numbers 0-9 and letters a-z except letters o and l.

The encoding precision is 0.1 second.

The method further includes: dividing the geographical range requiring location coding into several regions, and setting a region identifier for each region, and the region identifier and the 34-decimal code constitute a location code. Preferably, the geographical range requiring location coding is divided into 4 regions, and the region identifiers of the 4 regions are 5, 6, 7, and 8.

The thirty-quad encoding is four bits.

When the longitude or latitude of any position in a certain area is converted beyond the four-digit thirty-four-digit code, it is converted to a four-digit thirty-four-digit code, including: subtracting the longitude from the set first parameter or The latitude is subtracted from the set second parameter, and then decimal conversion and 34 hexadecimal conversion are performed; the first parameter is sexagesimal, and the second parameter is sexagesimal.

When the longitude or latitude of any location in a certain area is converted beyond the four-digit thirty-four-digit code, it will be converted into a four-digit thirty-four-digit code, including: subtracting the set longitude code from the converted decimal code Three parameters or subtract the set fourth parameter from the decimal code of the latitude conversion, and then perform thirty-quad conversion; the third parameter is decimal, and the fourth parameter is decimal.

When the longitude or latitude of any location in a certain area is converted to less than four-digit thirty-four-digit codes, convert it to four-digit thirty-four-digit codes, including: adding the longitude to the set fifth parameter or adding The latitude is added to the set sixth parameter, and then decimal conversion and 34 conversion are performed; the fifth parameter is sexagesimal, and the sixth parameter is sexagesimal.

When the longitude or latitude of any location in a certain area is converted to less than four-digit thirty-four-digit codes, it is converted to four-digit thirty-four-digit codes, including: adding the longitude-converted decimal codes to the set No. The seven parameters or the latitude-converted decimal code is added to the set eighth parameter, and then thirty-quad conversion is performed; the seventh parameter is decimal, and the eighth parameter is decimal.

The present invention also provides a positioning method for position coding, including:

Obtain a location code for a specific location;

receiving a positioning command for the specific location;

According to the position code of the specific position and the stored correspondence between the specific position and the position code, search for a specific position corresponding to the position code of the specific position, and locate the specific position on the electronic map.

The obtaining the location code of a specific location acquires the location code of a specific location from the current location service terminal or from other location service terminals other than the current location service terminal.

The location code is a thirty-four-digit code converted from latitude and longitude information of a specific location.

The steps of converting the latitude and longitude information of the corresponding specific location into a 34-decimal code include:

Determine the encoding accuracy;

Converting the latitude and longitude information into decimal codes according to the coding precision;

Convert the converted decimal code to the 34 code.

The location code can be composed of the thirty-four-digit code converted from the region identifier and the longitude and the thirty-four-code code converted by the latitude, and the steps of converting it into the location code are:

Determine the encoding accuracy;

Converting the latitude and longitude information into decimal codes according to the coding precision;

Determine the region identifier; convert the converted decimal codes of longitude and latitude into 34-decimal codes respectively, and the region identifier is composed of the 34-decimal codes converted from the longitude and the 34-decimal codes converted from the latitude location code.

After receiving the instruction to locate the specific location, it also includes:

Judging whether the obtained position code of a specific position exists in the stored position codes, if so, searching for the specific position according to the position code of the specific position and the stored correspondence between the specific position and the position code A specific location corresponding to the location code of , and locate the specific location on the electronic map; if not, output a code error prompt.

The present invention also provides a method for sending position codes, including:

Receive a sending instruction from a specific location;

According to the specific position and the stored correspondence between the specific position and the position code, search for the position code of a specific position corresponding to the specific position;

A location code for the specific location is sent.

The present invention also provides a location service terminal, including:

The storage unit is used for storing the corresponding relationship between a specific position and a position code;

a first receiving unit, configured to receive a location code of a specific location;

The second receiving unit is used to receive a positioning instruction of a specific position;

The first search unit is configured to search for the one according to the position code of the specific position and the stored correspondence between the specific position and the position code when the second receiving unit receives the positioning instruction of the one specific position. a specific location corresponding to the location code of the specific location;

The positioning unit is used to locate the specific position on the electronic map.

The location service terminal also includes:

a third receiving unit, configured to receive a sending instruction at a specific location;

The second search unit is used to search for a specific location corresponding to the specific location according to the specific location and the stored correspondence between the specific location and the location code after the third receiving unit receives a sending instruction from a specific location. the location code of the location;

A sending unit, configured to send the location code of the specific location.

The location service terminal also includes:

A judging module, configured to judge whether the obtained position code of a specific position exists in the pre-stored position code after the second receiving unit receives the positioning instruction of the specific position;

An error prompting unit, configured to output a prompt of a coding error when the judging module judges that the obtained position code of a specific position does not exist in the pre-stored position codes;

The first search unit is configured to, when the judging module judges that the obtained position code of a specific position exists in the pre-stored position code, according to the position code of the specific position and the stored specific position and position code Correspondence, find the specific position corresponding to the position code.

By implementing the technical solution of the present invention, since the position coding of the specific position is carried out, the specific position can be positioned more accurately.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is a flow chart of Embodiment 1 of the positioning method for position coded information of the present invention;

Fig. 2 is the flow chart of converting the latitude and longitude information of a specific position into position code embodiment 1 in the present invention;

Fig. 3 is the flowchart of the second embodiment of converting the latitude and longitude information of a specific location into position coding in the present invention;

FIG. 4 is a flow chart of Embodiment 1 of the method for sending position coded information in the present invention;

FIG. 5 is a logic diagram of Embodiment 1 of the location service terminal of the present invention;

Fig. 6 is a logic diagram of Embodiment 2 of the location service terminal of the present invention.

Detailed ways

As shown in Figure 1, in the flow chart of Embodiment 1 of the positioning method for position coding information of the present invention, the positioning method for position coding information includes:

Step S110. Obtain the location code of a specific location. In this step, the location code of a specific location can be obtained from the current location service terminal, or can be obtained from other location service terminals other than the current location service terminal through short messages, etc. The location code of a specific location, the location service terminal can be a computer, mobile phone, navigation equipment and other equipment;

Step S120. Receive the positioning command of the specific location;

Step S130. According to the position code of the specific position and the stored correspondence between the specific position and the position code, search for a specific position corresponding to the position code of the specific position;

Step S140. Locate the specific location on the electronic map.

In step S110, the location code of a specific location can be obtained in the following ways, for example, when using a location service terminal for navigation, receive GPS signals, determine the current location according to the GPS signals, and display the current location on the electronic map, because The navigation object can be moved, and the current position displayed on the electronic map also moves accordingly. The current position displayed on the electronic map can be represented by icons and cursors. During navigation, if an instruction input by the user to acquire the position code of the current position is received, the position code corresponding to the current position can be obtained. For another example, a browsing cursor is displayed on the electronic map, and the browsing cursor can move according to the user's operation, such as using a touch screen, sliding or moving the hand to the right, and the cursor will move accordingly. When browsing the electronic map, if an instruction to obtain the position code of the specific position where the cursor is located is received, the position code corresponding to the specific position can be obtained.

Preferably, the position code in the above embodiment may be a 34-decimal code converted from the latitude and longitude information of the specific location corresponding to the position code. It should be noted here that the present invention does not limit the 34-decimal system, and may also be binary, quaternary, hexadecimal, 30-binary, 50-hexadecimal and so on.

Fig. 2 is in the flow chart of converting the latitude and longitude information of a specific location into a position code embodiment 1 in the present invention, the steps of converting the latitude and longitude information into a position code include:

Step S111. Determine the coding precision. For example, it may be determined that the coding precision is 1*10 ⁻ⁿ seconds (n>=0, n is an integer), preferably, in this embodiment, n=1, and the coding precision is accurate to 0.1 second.

Step S112. Convert the latitude and longitude information into decimal coded information according to the coded precision. In this step, it should first be explained that latitude and longitude is a coordinate system composed of longitude and latitude, also known as a geographic coordinate system, which is a spherical coordinate system that uses a three-dimensional spherical surface to define space on the earth , which can mark any location on the earth. The latitude and longitude are in sexagesimal notation, that is, 1 degree of latitude and longitude = 60 minutes = 3600 seconds. If the determined coding accuracy is 0.1 second, let the longitude of a specific location be 39 degrees 20 minutes 10.0 seconds, and the latitude be 28 degrees 45 minutes 30.0 seconds. First, convert the longitude and latitude information into decimal codes, specifically: the converted longitude information The decimal code is: 39*60*60+20*60+10.0=140400.0, the converted decimal code of the latitude information is: 28*60*60+45*60+30.0=103530.0; then, the decimal code is 140400.0 , 103530.0 and 103530.0 are multiplied by 10 (reciprocal of precision 0.1), that is, 140400.0*10=1404000, 103530.0*10=1035300. The decimal code obtained after multiplying by 10 is the converted decimal code.

Step S113. Convert the converted decimal code to the corresponding 34 code. In this step, it should first be explained that the so-called thirty-four system has a base of 34, its carry rule is "every 34 carries 1", and its borrow rule is "borrow 1 as 34". In a preferred embodiment, the corresponding relationship between the decimal numbers and the 34-digit numbers is as shown in Table 1, that is, the numbers 0 to 9 and the letters a to z other letters except the letters o and l are used in total. 34 digits to represent the 34 digits of the thirty-four system. Therefore, in this embodiment, the code 1404000 in decimal system is converted into the code 11qi4 in the 34 system, and the code 1035300 in the decimal system is converted into the code sbk0 in the 34 system. It should be noted here that the present invention is not limited to the selection of thirty-four digits, the thirty-four digits are numbers 0 to 9 and letters a to z other letters except letters o and l, which can also be used Other symbols, such as α, β, , γ, δ, etc.

Table 1

The embodiment of the present invention is encoded into a 34-ary value, and 24 letters that can remove o and l from ten numbers and English letters from 0 to 9 can be used to achieve the effect of inputting codes through the keyboard, and solve the problems of numbers 0, 1 and 1. The letter o and l are easily confused.

Fig. 3 is in the flow chart of converting the latitude and longitude information of a specific location into position coding embodiment 2 in the present invention, the step of converting the latitude and longitude information into position coding includes:

Step S116. Determine the coding precision. It should be noted that this step is the same as the above step S111 and will not be repeated here.

Step S117. Convert the longitude and latitude into decimal codes respectively according to the coding precision. It should be noted that this step is the same as the above step S112 and will not be repeated here.

Step S118. Determine the region identifier, convert the converted decimal codes of longitude and latitude into 34-decimal codes respectively, the 34-decimal codes of the final conversion between the region identifier and longitude, and the 34-decimal codes of the final conversion of latitude The codes constitute positional codes. Divide the geographic range that needs location coding into several districts, and set a district identifier for each divided district. The location code is composed of the region identifier, the final converted 34-code of the longitude and latitude, and the final converted 34-code of the latitude. Preferably, the finally converted 34-digit encoding of the longitude is four digits, and the final converted thirty-four-digit encoding of the latitude is four digits.

The codes of the latitude and longitude obtained in step S113 in FIG. 2 are 11qi4 and sbk0 respectively. The 34-code "sbk0" is four digits, and the 34-code "11qi4" is five digits. The range of decimal values converted into four-digit thirty-four-digit codes should be 39304 to 1336335

When the longitude or latitude value of any location in a certain area is coded beyond the four-digit thirty-four-digit value range, the longitude can be subtracted from the set sexagesimal parameter M, and then decimal conversion and thirty-four-digit or subtract the latitude from the set sexagesimal parameter N, and then perform the decimal conversion and the thirty-four decimal conversion; then, the detailed steps of the conversion are: determine the encoding accuracy; subtract the longitude from the set sexagesimal The parameter M or the latitude minus the set sexagesimal parameter N, according to the coding accuracy, the value after the longitude minus M or the value after the latitude minus N is converted into a decimal code; the converted decimal code Then convert to thirty-four hexadecimal encoding. Or subtract the set decimal parameter X from the converted decimal code of the longitude, and then perform thirty-four decimal conversion; ; Then the detailed steps of conversion are: determine the coding precision; according to the coding precision, longitude and latitude information are converted into decimal coding; the decimal coding of longitude conversion is subtracted from X or the decimal coding of latitude conversion is subtracted from Y, Then convert the value after subtracting X from the decimal code converted from longitude or the value after subtracting Y from the decimal code converted from latitude to 34 decimal. In this way, the numerical range is reduced, so that the longitude and latitude of the area are converted into four-digit thirty-four-digit codes. For the above method, it should be noted that when the longitude and latitude of any location in a certain area are coded beyond the four-digit thirty-four-digit code, the longitude and latitude must be converted into four-digit thirty-four-digit code by the above method; When at any location in a certain area, the longitude is encoded to exceed the four-digit thirty-four-digit code, and the latitude is encoded to the four-digit thirty-four-digit code, it is only necessary to convert the longitude into a four-digit thirty-four-digit code by the above method system code, the thirty-four-digit code for latitude conversion is four digits, and no further conversion is required. When at any location in a certain area, the latitude is encoded to exceed the four-digit thirty-four-digit code, and the longitude is encoded to the four-digit thirty-four-digit code, it is only necessary to convert the latitude into a four-digit thirty-four-digit code by the above method system code, the thirty-four-digit code for longitude conversion itself is four digits, and no further conversion is required. Of course, the sexagesimal or decimal parameters set in each area can be different.

Similarly, when the numerical range of longitude or latitude of any position in a certain area is less than the numerical range of four-digit thirty-four digits after encoding, the method of increasing the data range can be adopted, that is, the longitude can be added to the set value. Sexagesimal parameter A, then perform decimal conversion and thirty-fourth decimal conversion or add the latitude to the set sexagesimal parameter B, then perform decimal conversion and thirty-fourth decimal conversion; or convert longitude to decimal encoding Add the set decimal parameter C, and then perform 34-decimal conversion, or add the set decimal parameter D to the latitude-converted decimal code, and then perform 34-decimal conversion. For the above method, it should be noted that when the longitude and latitude of any position in a certain area are coded to be less than four-digit thirty-four-digit codes, the longitude and latitude must be converted into four-digit thirty-four-digit codes by the above method; When at any location in a certain area, the longitude is coded to a four-digit 34-digit code, and the latitude is coded to a four-digit 34-digit code, you only need to convert the longitude into a four-digit 34-digit code by the above method system code. When at any location in a certain area, the latitude is coded to a four-digit thirty-four-digit code, and the longitude is coded to a four-digit thirty-four-digit code, it is only necessary to convert the latitude into a four-digit thirty-four-digit code by the above method system code.

The method of converting the longitude and latitude into four-digit 34-digit codes can also be replaced by other similar methods, which are not limited to the above-mentioned methods, and will not be described in detail here.

Taking China as an example, China’s territory starts from the center of the Heilongjiang River (53°30’ north latitude) north of Mohe River in the north, and ends at Zengmu Shoal (4° north latitude) at the southern end of the Nansha Islands in the south; it starts from the confluence of Heilongjiang and Wusuli River in the east (East longitude 135 degrees 05 minutes), west to the Pamirs (East longitude 73 degrees 40 minutes), across more than 60 degrees of longitude. China can be divided into 4 districts, and each district corresponds to a district identification, and 4 characters can be arbitrarily selected from 0 to 9 ten numbers and English letters except the 24 letters of o and l to represent these 4 districts, preferably selected 5, 6, 7, 8; it means that the four numbers 5, 6, 7, and 8 represent four areas respectively. The final location code is composed of the four-digit 34-digit code for the final conversion of the area identifier and longitude and the four-digit 34-digit code for the final conversion of the latitude, which ensures that each location corresponds to each location code.

The embodiment of the present invention is encoded into a 34-ary value, and 24 letters that can remove o and l from ten numbers and English letters from 0 to 9 can be used to achieve the effect of inputting codes through the keyboard, and solve the problems of numbers 0, 1 and 1. The letter o and l are easily confused.

Fig. 4 is a flow chart of Embodiment 1 of the method for sending position coded information of the present invention, the method for sending the position coded information includes:

Step S410. Receive a sending instruction from a specific location;

Step S420. According to the specific position and the stored correspondence between the specific position and the position code, search for the position code of a specific position corresponding to the specific position;

Step S430. Send the location code of the specific location.

In addition, it should be noted that the method of encoding the latitude and longitude information of a specific location in the preferred implementation of the positioning method for the above-mentioned position encoding information is also applicable to the method for sending the encoded information, and will not be repeated here.

Fig. 5 is a logic diagram of Embodiment 1 of the location service terminal of the present invention, the location service terminal includes:

The storage unit 100 is configured to store a correspondence between a specific position and a position code, and the position code of the specific position is obtained by encoding the latitude and longitude information of the specific position;

The first receiving unit 200 is configured to receive a position code of a specific position;

The second receiving unit 300 is configured to receive a positioning instruction of a specific location;

The first search unit 400 is configured to search for the location code of the specific location according to the location code of the specific location and the stored correspondence between the specific location and the location code when the second receiving unit receives the positioning instruction of the specific location. A specific location corresponding to a location code of a specific location;

The positioning unit 500 is configured to locate the specific location on the electronic map.

Fig. 6 is a logic diagram of the second embodiment of the location service terminal of the present invention. Compared with the first embodiment of the location service terminal shown in Fig. 5, the location service terminal further includes:

The third receiving unit 600 is configured to receive a sending instruction at a specific location;

The second search unit 700 is configured to search for a specific position corresponding to the specific position according to the specific position and the stored correspondence between the specific position and the position code after the third receiving unit receives the sending instruction of a specific position. location codes for specific locations;

The sending unit 800 is configured to send the location code of the specific location.

In addition, preferably, a judging module is further included between the second receiving unit 300 and the first searching unit 400, and the judging module is used for judging the obtained Whether a location code for a specific location exists in the pre-stored location codes. The location service terminal may further include an error prompting unit, which is configured to output a code error prompt when the judging module judges that the obtained location code of a specific location does not exist in the pre-stored location codes. The first search unit 400 in this embodiment is configured to, when the judging module judges that the obtained position code of a specific position exists in the pre-stored position code, according to the position code of the specific position and the stored specific position and The corresponding relationship of the position code, searching for the specific position corresponding to the position code.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of the claims of the present invention.

Claims (10)

1. A positioning method for position coding, characterized in that, comprising: Obtaining a location code of a specific location, the location code is a thirty-four-digit code converted from latitude and longitude; receiving a positioning command for the specific location; According to the position code of the specific position and the stored correspondence between the specific position and the position code, search for a specific position corresponding to the position code of the specific position, and locate the specific position on the electronic map. 2 . The location code positioning method according to claim 1 , wherein the location code of a specific location is obtained from the local location service terminal or from other location service terminals other than the current location service terminal. 3 . 3. The positioning method of position code according to claim 1, characterized in that, the position code is a 34-decimal code converted from the longitude and latitude of the specific position corresponding to the position code. 4. the positioning method of position code according to claim 3, is characterized in that, the longitude of corresponding specific position, latitude are converted into the step of the coding of 34 decimal system comprising: Determine the encoding accuracy; Converting the longitude and latitude of the specific location into a decimal code according to the coding precision; Convert the converted decimal code to a thirty-four position code. 5. the location method of position code according to claim 3, is characterized in that, described position code is converted by region identification and longitude four thirty-four hexadecimal codes and four four thirty four hexadecimal codes of latitude conversion Composition, the steps of converting into position codes are: Determine the encoding accuracy; Converting the longitude and latitude of the specific location into a decimal code according to the coding precision; Convert the converted decimal code to the thirty-four code; Divide the geographical range that requires location coding into several districts, and set an area identifier for each divided district; Determine whether the 34-digit code of any specific position in each area is equal to four digits, and if it is equal to 4 digits, then the region identifier of the district where the specific position is located and the 34-digit code are the specific The location code of the position; if it exceeds four or less than four digits, the 34-digit location code will be converted into a four-digit 34-digit location code, the region identifier of the area where the specific location is located and the final converted 4-digit code. The 34-bit position code constitutes the position code for that particular position. 6. The position-coding positioning method according to any one of claims 1-5, characterized in that, after receiving the instruction for positioning the specific position, further comprising: Judging whether the obtained position code of a specific position exists in the stored position codes, if so, searching for the specific position according to the position code of the specific position and the stored correspondence between the specific position and the position code A specific location corresponding to the location code of , and locate the specific location on the electronic map; if not, output a code error prompt. 7. A method for sending position codes, comprising: Receive a sending instruction from a specific location; According to the specific position and the stored corresponding relationship between the specific position and the position code, search for the position code of a specific position corresponding to the specific position, and the position code is a 34-decimal code converted from latitude and longitude; A location code for the specific location is sent. 8. A location service terminal, characterized in that it comprises: The storage unit is used to store the corresponding relationship between a specific position and a position code, and the position code is a thirty-four-digit code converted from latitude and longitude; a first receiving unit, configured to receive a location code of a specific location; The second receiving unit is used to receive a positioning instruction of a specific position; The first search unit is configured to search for the one according to the position code of the one specific position and the stored corresponding relationship between the specific position and the position code when the second receiving unit receives the positioning instruction of the one specific position. a specific location corresponding to the location code of the specific location; The positioning unit is used to locate the specific position on the electronic map. 9. The location service terminal according to claim 8, further comprising: a third receiving unit, configured to receive a sending instruction at a specific location; The second search unit is used to search for a specific location corresponding to the specific location according to the specific location and the stored correspondence between the specific location and the location code after the third receiving unit receives a sending instruction from a specific location. the location code of the location; A sending unit, configured to send the location code of the specific location. 10. The location service terminal according to claim 8 or 9, further comprising: A judging module, configured to judge whether the obtained position code of a specific position exists in the pre-stored position code after the second receiving unit receives the positioning instruction of the specific position; An error prompting unit, used for outputting a code error prompt when the judging module judges that the obtained position code of a specific position does not exist in the pre-stored position codes; The first search unit is configured to, when the judging module judges that the obtained position code of a specific position exists in the pre-stored position code, according to the position code of the specific position and the stored specific position and position code Correspondence, find the specific position corresponding to the position code.

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