Method and device for compressing and decompressing latitude and longitude data and storage medium
A technology of latitude and longitude and compression parameters, applied in the field of data processing, can solve the problem of low compression rate and achieve high compression rate and high decoding performance
Active Publication Date: 2019-06-25
BEIJING CHUANGXIN JOURNEY NETWORK TECH CO LTD
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[0003] Common latitude and longitude data compression methods include binary-based compression, compression based on the difference between before and after data, etc., and the compression rate is low
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[0016] The principle and spirit of the present invention will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are given only to enable those skilled in the art to better understand and implement the present invention, rather than to limit the scope of the present invention in any way.
[0017] It should be noted that although expressions such as "first" and "second" are used herein to describe different modules, steps, data, etc. of the embodiments of the present invention, expressions such as "first" and "second" are only for A distinction is made between different modules, steps, data, etc., without implying a particular order or degree of importance. In fact, expressions such as "first" and "second" can be used interchangeably.
[0018] Such as figure 1 As shown, an embodiment of the present invention proposes a method 100 for compressing latitude and longitude data. The method 100 includes steps S101-S10...
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The invention provides a method and device for compressing and decompressing longitude and latitude data and a computer readable storage medium. The method for compressing the latitude and longitude data comprises the steps of acquiring compression parameters, wherein the compression parameters comprise geographic position precision and index hierarchy numbers; obtaining a latitude and longitude data set; determining a reference geographic area associated with the reference latitude and longitude data according to the geographic position precision and the index hierarchy number, and dividing blocks in the reference geographic area according to levels; calculating the block position of the latitude and longitude represented by the latitude and longitude data to be compressed in each level;Depending on pre-stored locations Obtaining a character corresponding to the block position through the character mapping table, and obtaining compressed latitude and longitude data according to thecharacter; And storing the compression parameters, the reference latitude and longitude data and the compressed latitude and longitude data in a compressed data set. According to the method and the device for compressing and decompressing the latitude and longitude data, text-based compression can be realized, independent decoding is facilitated, and a high compression rate is achieved.
Description
technical field [0001] The present invention generally relates to data processing technology, and more particularly relates to a method, an apparatus and a computer-readable storage medium for compressing latitude-longitude data and decompressing the latitude-longitude data compressed. Background technique [0002] The latitude-longitude system can be used to describe locations and sets of locations in a latitude-longitude coordinate system. It is widely used in systems based on GIS (Geographic Information System, geographic information system) and LBS (Location Based Service, location-based service). In practical applications, it is often necessary to store and transmit a large number of latitude and longitude data sets, such as rendering of paintings based on latitude and longitude point sets on web pages. By applying latitude and longitude data compression methods, the cost of data storage and transmission can be reduced. [0003] Common latitude and longitude data comp...
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IPC IPC(8): H03M7/30
Inventor 许旻昊
Owner BEIJING CHUANGXIN JOURNEY NETWORK TECH CO LTD