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A method and device for improving map display accuracy

A map and precision technology, applied in the field of deviation correction, can solve problems such as incomplete correction information, not covering every area, deviation between coordinate points and actual position, etc., and achieve the effect of improving display accuracy

Active Publication Date: 2017-11-03
ZUNYI BRANCH OF CHINA MOBILE GRP GUIZHOU COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the existing deviation correction information is not complete and does not cover every area; therefore, in areas where the deviation correction information is incomplete, deviation correction cannot be performed, resulting in a large deviation between the coordinate points in the map and the actual position

Method used

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  • A method and device for improving map display accuracy
  • A method and device for improving map display accuracy
  • A method and device for improving map display accuracy

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Embodiment Construction

[0035] The implementation manner of the present invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.

[0036] figure 1 It is a schematic diagram of the implementation flow of the method for improving the accuracy of map display in the embodiment of the present invention, as shown in figure 1 As shown, the method includes:

[0037] Step 101: randomly select a point as an adjustment point, and determine the coordinates of the adjustment point in each map;

[0038] Before determining the adjustment point, the embodiment of the present invention further includes: pre-selecting a plurality of maps, respectively called the first map, the second map, ..., the Nth map;

[0039] Correspondingly, the determining the coordinates of the adjustment point in each map includes: respectively determining the coordinate points of the adjustment point in the coordinate systems corresponding to the first map, the second map to the Nth m...

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Abstract

The invention discloses a method for improving map display accuracy, which includes: selecting a point arbitrarily as an adjustment point, and determining the coordinates of the adjustment point in each map; determining M reference points, and determining the M reference points at Coordinates in each map; respectively calculate the distance between the adjustment point in each map and the M reference points; calculate the weighted average of the distances between the adjustment point and the same reference point in each map, and adjust the adjustment according to the weighted average The displacement of the point in each map. The invention also discloses a device for improving map display accuracy.

Description

technical field [0001] The invention relates to a deviation correction technology in the map display process, in particular to a method and a device for improving map display accuracy. Background technique [0002] According to relevant laws and regulations, when issuing civil map products, the use of real coordinates is generally not allowed due to national security considerations, and a certain offset must be added. This offset is realized through the confidential plug-in of the national surveying and mapping department, and will not affect users. usage of. Here, the security plug-in, also called an encryption plug-in or a biasing plug-in, is to artificially bias the real coordinate system, and encrypt the real coordinates into false coordinates according to a specific algorithm. The biasing is not a linear biasing, So the offset varies from place to place. All electronic maps and all navigation equipment need to add security plug-ins. [0003] Since the earth is an irr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B29/00
Inventor 穆宏李文华林昊孙岚刘玉曾丽项凯唐春明夏晶邹一枝代鹰高少华
Owner ZUNYI BRANCH OF CHINA MOBILE GRP GUIZHOU COMPANY