Query System on Segmental Map-Tables of Relief Maps in China Based on ComGIS
基于组件式GIS技术的中国地形图分幅表查询系统

The technology of component software has been one of mainstreams in the development of software technologies today.It is also one of the hotspots of the Geographic Information System (GIS).Component GIS would be an important direction in the development of GIS in future.In this paper a query system for segmental map-tables of relief maps in China was developed based on ComGIS technologies.The segmental map-tables of relief maps were made according to the regulation of dividing-map and map-coding of national basic scale relief maps.Firstly the data with generate format were made and then the original generate data were converted into Shapfile data by using the predominant spatial analysis function of Arcview3.3 of GIS tools.Finally,spatial database of the different scale relief maps in China was created.On the base of the spatial database,the object oriented VB (Visual Basic6.0) develop-platform and MO (MapObjects2.2) component were adopted to compile the thematic geographic information system software-query system on segmental map-tables of relief maps in China.