Research And Practice On The GIS Web Service

As one of GIS development directions, WebGIS impetus the widespread application of geographic information. But at the same time it faces some difficult, such as unable to realize the cross-platform operation, unable to realize the interoperation on heterogeneous spatial data, unable to share the function resources. It has difficult on development debugging and maintenance and so on. With the appearance of GIS Web Service, it becomes possible to resolve the problems of traditional WebGIS. GIS Web Service, a union product of Web Service and GIS, is a new generation WebGIS. It provides new solutions for the geographical information sharing, interoperation and integration.Based on the analysis of theory and technology about GIS Web Service, we focus on how to construct the GIS Web Service with .NET, on how to distribute and search it in private UDDI registration center, and on the application problems of it. The research contents and works have been done as following:1. Introduced and analyzed the theory and technology about GIS Web Service, which included: Web Service and the key technology; GIS Web service's definition and system structure; OGC Geographic Information Service standard.2. Discussed two ways to develop the GIS Web Service: Taken the Douglas-Peucker compression algorithm as the example, independently designed and developed a GIS Web Service. This paper analised the architecture and inner mechanism of ArcGIS Server, and in internal realization mechanism foundation, founded using ArcGIS Server to carry on experimental by the Geocode service.3. Aiming at the UDDI agreement's no consideration on the valid sustain of GIS Web Service, we present a classification system for GIS Web Service, and built a private UDDI which is extended by intramural taxonomy.4. With GIS Service classifacation plan in it, we built a private UDDI registration center and implemented the means to register and discover GIS Service based on patulous taxonomy.5. This paper designed and constructed an application experimental system of GIS Web Service. It implement that high-level GIS functions introduced in the Web GIS thought application of Data Compress sevice and Geocode service.