Research on Spatial Information Search Engine

This paper investigates the four online spatial information search strategies, namely Geo-footprint, Clearinghouse, OpenGIS specifications, and Geographical Network. A Spatial Web Service-based dynamic spatial information search engine with a novel client end named MapCompass is discussed. A search engine is designed with four parts: online spatial information spider, distributed spatial information indexer, dynamic spatial web service adaptor, and query processor, which are introduced in this paper respectively. It can be concluded that proposed concept design of spatial information search engine can greatly promote the online spatial information retrieving.