A Brief Introduction of Data Management for Volunteered Geographic Information

Volunteered Geographic Information(VGI) is a new concept emerging with the development of geographic information science.This paper briefly analyses the sources,categories and characteristics of VGI data,presents the requirement of VGI data management,discusses the issues of data cleaning and quality control,focuses on the research of the VGI data management whose target is high performance processing of plotting queries and data updates.Two kinds of spatial data structures are presented.Dynamic binary line generalization tree,which is an extension to binary line generalization tree(BLG-tree),is designed to process the queries and updates of a single spatial object.Zoom quadtree,which includes two quadtree that function as spatial indexes and materialized views,is designed to index and organize the voluminous spatial objects.