High-precision electronic map position matching method for field navigation patrol

Abstract

The invention discloses a high-precision electronic map position matching method for field navigation patrol. According to the method, through the steps, the coordinates of the landmark points and the coordinates measured by the handheld GNSS positioning equipment in real time can be converted into the coordinates required by sub-map display; meanwhile, landmark point coordinates and GNSS measurement coordinates are displayed on the sub-map, and matching of the landmark point coordinates and the GNSS measurement coordinates can be completed; the sub-map adopts a self-defined coordinate axis and a self-defined range, and the relative position of the landmark and the positioning point can be displayed on the sub-map very accurately; a double-map mode is adopted to synchronously match and display a third-party map, a landmark and a user positioning point position. A user can grasp the global condition of a patrol range through an electronic equipment screen in field patrol, and can also grasp the local detail condition of landmarks in a current position range. Therefore, an accurate patrol route can be provided for navigation of field patrol of the user.

Description

technical field [0001] The invention belongs to the technical field of high-precision electronic maps, in particular to a high-precision electronic map position matching method for field navigation inspection. Background technique [0002] Electronic map, that is, digital map, is a map that is stored and consulted digitally using computer technology. The electronic map is a map generated by electronic computer control. It is a screen map based on digital mapping technology and a visualized real map. "Visualization on a computer screen" is the fundamental feature of an electronic map. The data elements of electronic maps include physical or digital data units with real existence such as buildings, roads, pipe networks, and ownership boundaries; the types of electronic maps include satellite remote sensing image maps, topographic elevation maps, and standard-based Ordinary maps digitized with symbols, etc. Global navigation satellite system refers to all satellite navigatio...

AI Technical Summary

Problems solved by technology

[0003] There are two main problems in the prior art method: (1) the problem of the matching distortion of the landmark position on the electronic map

There is a deviation when the landmark coordinates are directly superimposed on the electronic map. This deviation will make it difficult for users to judge their actual location based on the electronic map when patrolling.

In addition, because the electronic satellite image will have a certain inclination when shooting, this will also cause the matching distortion of the relative position of the landmark and the electronic map; (2) the problem of high-precision display of the landmark on the electronic map

Due to the limited zoom level of existing electronic maps and the limited resolution of the human eye, when the landmarks are superimposed on the electronic map, it is difficult to accurately judge the relative relationship between the current position and the landmark position on the electronic map

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