Edge Detection Method of Vector Surface Data Based on Distance and Angle Control

Abstract

The present invention provides a vector surface data edge match detection method based on distance and angle control. The method comprises the following steps: (1) an edge match characteristic line generation step of cutting the border line of a vector surface by using a edge match tolerance distance dt as a threshold and generating a characteristic line, (2) an edge match characteristic line simplification step of eliminating the redundant collineation node on the edge match characteristic line and simplifying the edge match characteristic line, (3) an edge match characteristic point detection step, and (4) an edge match judgment step of using the edge match characteristic point to carry out edge match judgment. The invention aims to check an edge match wrong position, the distance value from the vector surface to an edge match line and an arc rotation angle value are used as reference quantity to detect the edge match characteristic point, the detection of an edge match error is carried out based on an edge match characteristic point match result, and the vector surface data edge match error detection is accurately and effectively completed, and the positioning is carried out accurately.

Description

technical field [0001] The invention relates to a detection technology of vector surface data borders, in particular to a technology for searching, detecting and matching feature points of vector surface data borders by using distance and angle. Background technique [0002] In view of the fact that the collection of geographic data involves a wide range of space, the huge amount of geographic data, and the limitations of collection capabilities, geographic data is often collected in a sub-regional manner, so the quality of the data collected in different regions directly affects the later stage. The reliability and value of data analysis results. The problem of edge detection of vector surface data has always been a difficult point of geographic data edge, and it is also an important guarantee for effectively repairing edge errors of vector surface data. [0003] Because the vector point data does not involve the bordering problem, and the vector line data bordering is ver...

AI Technical Summary

Problems solved by technology

[0006] (1) Research on data organized by standard framing, the boundary line is a straight line, lack of discussion on the boundary of vector data organized according to administrative divisions, and it is difficult to deal with the situation where the boundary line is an irregular curve

Images