一种VGI矢量数据增量变化发现的多层次蔓延匹配算法

目的 矢量要素的匹配是发现地物要素变化的重要方法之一,高精度的匹配结果有助于更快地发现变化地物,进行更新。VGI矢量数据具有几何和语义信息丰富的特点,但使用传统的矢量要素匹配算法难以发挥VGI矢量数据的优势。以城市 VGI道路数据为研究内容,提出基于多层次蔓延的矢量要素匹配算法,将 VGI数据和专业测绘数据进行匹配对比,从而实现道路变化增量信息的快速识别。

A VGI Vector Road Data Increment Distinguishing ResearchBased on Multilevel Spreading Algorithm

Objective Volunteered geographic information(VGI)contributed by Internet users is more and morewidely used as data updating source for industries such as navigation,and for disaster emergencies.This way of data acquisition is faster and cheaper than traditional surveying and mapping data.Howto detect and extract changed information in massive amounts of VGI data in a timely way is a problemto be solved.The high precision results of vector feature matching can help to find the changed fea-tures faster.VGI vector data has rich geometric and semantic information,traditional vector featurematching algorithm is not suitable for this purpose.In this paper,we proposed a multilevel spreadingalgorithm in vector feature matching,and applied the city road network as the research content,tocompare VGI vector data to the data from the professional surveying and mapping departments to real-ize the change detection in a road network.