Greenland Information System Based On WebGIS Of Open Source

WebGIS is one kind of computer information system memorizing, processing, demonstrating, analyzing and applying the geography information under the environment of Internet or Intranet network. Namely using the computation pattern of the browser/server to issue electron map through the Internet, achieving the GIS function.WebGIS already penetrated into all the various trades and occupations, raising the management level and the efficiency. However, Says regarding some middle and small scale users, They only have some simple demand of GIS(the functions such as spatial inquiry, simple analysis) , It is not necessary to use expensive commercial WebGIS software. Therefore, open source WebGIS appears especially important for them.Database domain. It is applied for many different domains in domestic and foreign. But space data has characteristics such as great data quantity, complex structure , the attribute data has close correlation with the spatial data, different data type along with its reflection geography characteristic. As a result of huge quantity of spatial data, as well as highly complexity of spatial object, spatial relations , The spatial database inquiry efficiency and the analysis ability become the key point of spatial database research , The practical application also set the urgent need to the spatial database inquiry and the analysis performance.This article unifies the Wenzhou greenland information system project, based on expansion module PostGIS of Open source space database PostgreSQL , Giving reasonable lamination to Wenzhou greenland data, And establishing index to each lamination. Using formidable SQL of spatial database to realize the GIS analyzing function, realize the GIS function, Simultaneously It has also met the middle and small scale user's needs.