| GIS is a system to cope with the geography spatial data.With the development of WebGIS and the growth of CDMA and GPS, MOBILE GIS,which concerns deeply with PDA and mobile phone becomes the new direction of GIS.As data used in it is transmitted by wireless network, so to find a data format of GIS to improve the application efficiency of MOBILE GIS and to standard the various GIS data formate is become a difficulty. This paper do deep research about MOBILE GIS data structure from Oracle Spatial,f file and GML,and test their efficiency in the MOBILE applications respectively on server.We give two inproved methodsfor f file which is applied in our real system Ezmap.Also we give two common two system model used in wireless enviroment-WAP GIS and GML GIS-and also give a way to transform GML into SVG to dispaly the GIS graph.We believe our research and some ideas will do contributions to MOBILE GIS development of China. |
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