Design and Implementation of GIS by ComGIS A Case Study in National Earthen Site Geographic Information System

Geographic Information System, as the special technology of dealing with spatial data, it was significance to establish the Geographic Information System. The study developed and implemented a National Earthen Site Geographic Information System. It can provide some information of the existing earth sites, supply workers and experts some decision-making basis of research and protection. At the same time, the public can use it to retrieve some information to meet their needs of travel, study and even research work. The Earthen Site Database (ESDB) was setup firstly by using SQL Server software, which take SuperMap SDX+ as its spatial search engine and the format of SuperMap complex dataset as the storage format for vector data. Secondly, C/S framework was adopted so as to improve the flexibility of the system. Component GIS (ComGIS) technique was used to finish the secondary development of the system. Lastly, the NESGIS had realized by comGIS.