The topographic maps and geological maps are processed and scanned.Then the spacial database is built in ArcGIS and Oracle is used as the background database.ArcSDE is used to help ArcGIS to access,display,and query,manage and download data.%将地形图和地质图等进行处理和数字化,然后在GIS平台ArcGIS中建立空间数据库,采用Oracle作为后台数据库,使用空间数据引擎ArcSDE来管理ArcGIS对数据的访问,实现显示、查询、管理和下载等功能.
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