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Concurrent checking method and system for basic geographic data

A geographic data, common point technology, applied in the field of geographic information, can solve a lot of time cost, labor cost, can not meet the needs of basic geographic data production and other problems, to reduce time cost and labor cost, fast speed, high accuracy Effect

Active Publication Date: 2018-03-02
吉奥时空信息技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] The present invention mainly solves the problem that manual inspection of common point errors in the prior art requires a lot of time and labor costs, and cannot meet the needs of actual basic geographic data production, and provides a method for common point checking of basic geographic data

Method used

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  • Concurrent checking method and system for basic geographic data
  • Concurrent checking method and system for basic geographic data
  • Concurrent checking method and system for basic geographic data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0070] This solution is used to check the common point problem of basic geographic data. The workflow is as follows Figure 4 shown, including:

[0071] (1) Load the data that needs to be checked for common point.

[0072] (2) The quadtree algorithm is used to block the data within the envelope range, and when the number of elements exceeds the threshold, the block is continued.

[0073]

[0074]

[0075]

[0076]

[0077] where: e m1 ,e m2 ,e m3 ,e m4 are the four sub-rectangular frames obtained by quartering the rectangular frame; (x min ,x max ,y min ,y max ) is the envelope range of the new rectangle; x min , x max , y min , y max are the coordinate values ​​of the original envelope range, respectively.

[0078] (3) According to each block unit, find all geometric objects intersecting with this block unit.

[0079]

[0080] In the formula: G is the set of all point, line and surface geometric objects in the block unit; X mn is the X coordinate...

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Abstract

The invention relates to a concurrent checking method and system, in particular to a concurrent checking method and system for basic geographic data and belongs to the field of geographic informationtechnology. According to the method, a quadtree is adopted to partition the data, and a multithread processing mechanism is adopted. Therefore, a concurrent error of the basic geographic data can be efficiently checked, accuracy is high, speed is high, and time cost and labor cost of concurrent error checking of the basic geographic data are greatly lowered.

Description

technical field [0001] The invention relates to a method and system for co-point inspection, belonging to the technical field of geographic information, in particular to a method and system for co-point inspection of basic geographic data. Background technique [0002] There are usually three methods for the collection of conventional basic geographic data: actual measurement method, graphical method, and comprehensive method. In actual production, these three methods may cause common point errors due to machine measurement errors and manual errors: [0003] i. Test method. Since the measuring machine, such as GPS and total station, will have certain errors in the measurement process, the collected basic geographic data will also have a common point error; [0004] ii. Graphical method. Basic geographic data is collected manually on digital orthophotos. Since there are errors in manual sketching, the collected basic geographic data will also have common point errors; ...

Claims

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Application Information

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IPC IPC(8): G06F17/30
CPCG06F16/29
Inventor 谢刚姜孝兵罗亓珑刘奕夫黄金森凌海锋袁慎明陈新伟林洋
Owner 吉奥时空信息技术股份有限公司