JSON-based raster data adaptive compression transmission method and computer storage medium

A raster data and transmission method technology, applied in the direction of transmission systems, electrical components, etc., can solve the problems of unsatisfactory compression effect of large raster data and reduce the amount of transmitted data, so as to reduce the amount of transmitted data, high compression efficiency, The effect of reducing species

Active Publication Date: 2021-11-16
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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Problems solved by technology

[0004] Purpose of the invention: the technical problem to be solved by the present invention is to provide a JSON-based raster data adaptive compression transmission method and computer storage medium, which solves the problem that the existing JSON data compression method has an unsatisfactory compression effect on large block raster data. The problem is that raster data can be compressed to a greater extent, significantly reducing the amount of transmitted data, reducing transmission bandwidth requirements, and improving transmission efficiency. In addition, based on JSON, raster data can be transmitted across languages, which has better practicability and flexibility.

Method used

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  • JSON-based raster data adaptive compression transmission method and computer storage medium
  • JSON-based raster data adaptive compression transmission method and computer storage medium
  • JSON-based raster data adaptive compression transmission method and computer storage medium

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Embodiment Construction

[0056] The embodiment of the present invention is based on the existing grid map as the original data source, and the method flow is as follows figure 1 As shown, specifically:

[0057] Step 1. Obtain the grid data matrix, that is, select the rectangular area to be transmitted in the geographic coordinate system, set the longitude and the quantified longitude in the latitude direction, and discretize the rectangular area into a grid matrix according to the terrain comparison table. Extract the area to be transmitted from the map, and convert the area into a raster data matrix according to the characteristics of geographic information. Select the starting coordinate point S(J in the geographic coordinate system s , W s ), the end coordinate point E(J e , W e ), form a rectangular area, and set the discrete precision K in the direction of latitude and longitude I 、K W , the unit of discrete precision is "degree / unit". According to the formula (1), the rectangular area is d...

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Abstract

The invention discloses a JSON-based raster data self-adaptive compression transmission method and a computer storage medium. The adopted self-adaptive compression method, according to the characteristics of the raster data, establishes a raster data dictionary and self-adaptively adjusts the compression factor. Raster-related parameters and values ​​are converted to Key and Value in JSON, and the compressed transmission of raster data is realized based on JSON. Compared with the traditional JSON-based compression transmission method, it can compress raster data to a greater extent and reduce transmission bandwidth requirements. Moreover, based on JSON, raster data can be transmitted across languages, which has better practicability and flexibility.

Description

technical field [0001] The invention relates to an adaptive compression transmission method and a computer storage medium, in particular to a JSON-based raster data adaptive compression transmission method and a computer storage medium. Background technique [0002] JSON (JavaScript Object Notation) is a lightweight, cross-language data exchange format, which uses Key and Value to indicate the transmitted data items and specific content. JSON is easy to write and analyze, and has strong readability. It can be used for data interaction such as network and messages. It is an ideal data exchange language. Although JSON is a lightweight structure, it can also transmit memory block data such as images or rasters, but it needs to convert the memory into a data stream first, and then perform Base64 encoding. The transmission efficiency of raster data depends on the size of the raster data transmitted by JSON. If the data is too large, it will take up more transmission bandwidth an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06
CPCH04L69/04
Inventor 嵇亮亮王海青应励志施卫峰王伟娄行威陈万桥尹华飞程希明邓涛王玉宝
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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