Spatial database index is the vital technique for improving the storage efficiency of spatial databases and the spatial retrieval performance.
空间数据库的索引是提高空间数据库存储效率、空间检索性能的关键技术。
But it is very difficult to use common data-management technique based on relation database to the geological data because of their distinct spatial features and complex configurations.
然而，地学数据显著的空间特征和复杂的结构属性又不能简单运用常规的数据库管理系统进行表述、处理。
Taking two examples, matching spatial features and their attributes and deleting reduplicate features in spatial database, indicate the technique key point of this appro.
分别以空间要素与其属性挂接和删除重复要素为例，来说明该方法的技术要点。
MAPGIS is mainly used in digital mapping, spatial database management and spatial analysis. In China, this technique has already been widely utilized.
MAPGIS在国内应用相当广泛，主要用于数字制图及空间数据库管理、空间分析。
MAPGIS is mainly used in digital mapping, spatial database management and spatial analysis. In China, this technique has already been widely utilized.
MAPGIS在国内应用相当广泛，主要用于数字制图及空间数据库管理、空间分析。
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