Study on Space Filtering Component Based on WebGIS

As the currently used GNetViewer9.0 platform does not provide custom-area space filtering function on the Web,enabling the accurate information within the designated area is very difficult to query.Based on the basic function of GIS,this paper proposes a new method of dynamic drawing custom-area in the client-side based on VML technology,through a directed edge-weighted,to solve the intersection number based on database stored procedure,quickly to detect the accurate information within the designated area.Practice shows the fast component query speed and high accuracy.