Geographic position coding method
Geographic position coding method
 CN 104,598,649 A
 Filed: 02/26/2015
 Published: 05/06/2015
 Est. Priority Date: 02/26/2015
 Status: Active Application
First Claim
1. a geographic position coding method, is characterized in that, comprising:
 Obtain geographic position, wherein, described geographic position comprises longitude and latitude;
Described longitude is encoded to the scaleoftwo of nbit, wherein, the scaleoftwo of described nbit comprises sign field and data segment, described data segment comprises the first data segment and the second data segment, by the symbolic coding of described longitude to described sign field, by described longitude absolute encoder to described data segment, wherein, described first data segment represents the integral part of described longitude absolute value, and described second data segment represents the fraction part of described longitude absolute value, n be greater than 9 integer;
Described latitude is encoded to the scaleoftwo of described nbit, by the symbolic coding of described latitude to described sign field, by described latitude absolute encoder to described data segment;
AndCoding schedule according to presetting carries out string encoding to the scaleoftwo longitude of described nbit and the scaleoftwo latitude of described nbit, obtains position encoded.
Chinese PRB Reexamination
Abstract
The invention provides a geographic position coding method. The method comprises the following steps: obtaining a geographic position; coding a longitude into an nbit binary system, coding a symbol of the longitude into a symbol section, coding an absolute value of the longitude into a data section, wherein a first data section expresses an integer part of the absolute value of the longitude, and a second data section expresses a decimal part of the absolute value of the longitude; coding a latitude into an nbit binary system, coding a symbol of the latitude into the symbol section, and coding an absolute value of the latitude into a data section; performing character string coding on the longitude of the nbit binary system and the latitude of the nbit binary system according to a preset coding schedule so as to obtain a position coding. The character string coding is performed on the longitude of the nbit binary system and the latitude of the nbit binary system according to the preset coding schedule by the method so as to obtain the position coding, the coding of the geographic position can be independent of a specific application program, and besides the obtained position coding is more convenient to share, memorize and store.

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9 Claims

1. a geographic position coding method, is characterized in that, comprising:

Obtain geographic position, wherein, described geographic position comprises longitude and latitude; Described longitude is encoded to the scaleoftwo of nbit, wherein, the scaleoftwo of described nbit comprises sign field and data segment, described data segment comprises the first data segment and the second data segment, by the symbolic coding of described longitude to described sign field, by described longitude absolute encoder to described data segment, wherein, described first data segment represents the integral part of described longitude absolute value, and described second data segment represents the fraction part of described longitude absolute value, n be greater than 9 integer; Described latitude is encoded to the scaleoftwo of described nbit, by the symbolic coding of described latitude to described sign field, by described latitude absolute encoder to described data segment;
AndCoding schedule according to presetting carries out string encoding to the scaleoftwo longitude of described nbit and the scaleoftwo latitude of described nbit, obtains position encoded.


2. method according to claim 1, is characterized in that, describedly described longitude is encoded to the scaleoftwo of nbit and the described scaleoftwo described latitude being encoded to nbit, comprising:

By 1 bit being represented symbol and 8 bits represent the data on the left of radix point, and the n9 bit of remainder is represented the data on the right side of radix point, described longitude to be encoded to the scaleoftwo of nbit; By 1 bit being represented symbol and 7 bits represent the data on the left of radix point, and the n8 bit of remainder is represented the data on the right side of radix point, described latitude to be encoded to the scaleoftwo of nbit.


3. method according to claim 1, is characterized in that, describedly described longitude is encoded to the scaleoftwo of nbit and the described scaleoftwo described latitude being encoded to nbit, comprising:

According to the symbol of described longitude, determine the first bit value of described scaleoftwo longitude, and the absolute value of described longitude is multiplied by 2 ^{n9}after round, obtain the scaleoftwo longitude of described nbit;
According to the symbol of described latitude, determine the first bit value of described scaleoftwo latitude, and the absolute value of described latitude is multiplied by 2 ^{n8}after round, obtain the scaleoftwo latitude of described nbit.


4. the method according to claim 13, is characterized in that, the coding schedule that described basis is preset carries out string encoding to the scaleoftwo longitude of described nbit and the scaleoftwo latitude of described nbit, obtains position encoded, comprising:

Successively getting scaleoftwo latitude described in scaleoftwo longitude described in 3 bits and 3 bits is from left to right one group, and according to the coding schedule preset, inquiry obtains corresponding coded character, and wherein, described coded character is printable character; Described coded character is linked in sequence, obtains described position encoded, described position encoded be n/3 position, wherein, n is the integral multiple of 3.


5. method according to claim 1, is characterized in that, also comprises:

Shared by described position encoded position of carrying out, specifically comprise; Transmit leg equipment obtains described position encoded, and sends to receiver equipment; Receiver equipment receives described position encoded, and the coding schedule decoding according to presetting obtains corresponding scaleoftwo longitude and scaleoftwo latitude, and described scaleoftwo longitude and scaleoftwo latitude are converted to metric longitude and latitude; Receiver equipment represents described metric longitude and geographic position corresponding to latitude.


6. method according to claim 1, is characterized in that, also comprises:
By briefly position encoded and supplementary, geographic position is described, wherein, described briefly position encoded be described position encoded rear (n/3k) position, described supplementary represents the region at the place, geographic position that all position encoded front k positions are identical with described position encoded front k position, and k is greater than the positive integer that 1 is less than or equal to n/3.

7. method according to claim 6, is characterized in that, also comprises:

Obtain corresponding geographic position according to described briefly position encoded and described supplementary, specifically comprise the following steps; 1) obtain the figure place of described position encoded prefix according to described briefly position encoded figure place, thus obtain the bit number of described prefix; 2) optional prefix is obtained according to longitude corresponding to described supplementary and latitude scope; 3) each described optional prefix to be briefly position encodedly connected with described, the geographic position of position encoded correspondence that test obtains after connecting and the degree of closeness of described supplementary; 4), in the geographic position of the position encoded correspondence obtained after described connection, immediate one is found with described supplementary.


8. method according to claim 5, is characterized in that, described receiver equipment represents described metric longitude and geographic position corresponding to latitude, comprising:
The location of described geographic position on map is obtained according to described metric longitude and latitude.

9. the geographic position coding method according to claim 18, is characterized in that, also comprise:
By adjusting the value of described n, the precision in the geographic position represented by adjustment.
Specification(s)