The Performance Evaluations and Enhancements of GIS Web Services

By introducing Web Services, distributed GIS(Geospatial Information System) services from different vendors can be dynamically integrated into a GIS application using the interoperable standard SOAP(Simple Object Access Protocol). However, it is debatable whether SOAP can really meet the performance requirement of GIS. According to the development of Web 2.0, several technologies are issued. Among those, Ajax (Asynchronous JavaScript and XML) provides asynchronous communication between the client and the server. Integrating Ajax approach into GIS visualization Web Services has performance enhancements, because it is applied both Web Services ' and Ajax's benefits.