Moving target activity range recording method based on local grid

Abstract

The invention provides a moving target activity range recording method based on a local grid. According to the local grid, any longitude and latitude point serves as a grid starting point, the longitude line where the point is located serves as a grid center line, grid lines with the equal geographic distance are expanded towards the two sides, grid lines with the equal geographic distance are expanded in the latitude increasing direction of the starting point, a geographic space is divided into a plurality of grid units with the equal geographic distance, and a boundary is constructed to determine a grid code. Based on the subdivided grid area, the grid unit code and time information passed by the moving target are recorded in real time. According to the method, the geographic space is subdivided based on the equal geographic distance, and the longitude lines are considered as the grid center lines. The geographic distance of each grid unit can be defined, and the data storage capacity of the moving target activity range can be effectively reduced by combining a dynamic coding method and a mode of representing vector points by grid data, so that the activity range of the moving target can be visually displayed and quickly queried.

Description

technical field [0001] The invention relates to a method for recording the moving range of a moving target based on a local grid. Background technique [0002] Grid subdivision is the discretization, accuracy, and systematization of earth information data. It is an important basic issue in geographic information science and digital earth, and it is the source and destination of all geographic calculations. In recent years, with the increasing development and global application of satellite systems such as GPS and Beidou, people attach great importance to the basic issues related to the accuracy of global three-dimensional position, accuracy of measurement and overall spatial analysis, and the rapid construction of spatial relationships between space objects. . [0003] The general grid division should follow the following principles: it can be compatible with the map framing system, and the grid units of different sizes in the framework, also known as subdivision units, can...

AI Technical Summary

Problems solved by technology

[0009] Whether it is equidistant or equal latitude difference division method, the geographical space is divided based on latitude and longitude. The distance of each division unit is expressed in degrees, and then the degree is converted into an approximate geographical distance. Each division unit The geographic distance of cannot be precise

And the grid coding of the above grid subdivision method, with the completion of the grid subdivision process, the coding of each grid unit is fixed and cannot be changed

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