Study on Algorism for Polygon Overlay in Geographic Information System (GIS)

This paper discusses the algorism for polygon overlay. The result shows: The problem of complicated topology relation after coverage overlay and difficulty of feature attribute refilling can easily be resolved in the way of merging two map into a new one, regenerating the topology relation of spatial data, regenerating polygons, regenerating label points and refilling feature attribute with label points. The coverage overlay can be implemented successfully.