Database is the basis of geographical information systems (GIS).

数据库是地理信息系统(GIS)的基础。

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Geographical Information Systems (GIS) are characterised by the ability to integrate geospatial data from a wide variety of sources.

地理信息系统(GIS)的特点是能从各种各样的来源中整合地理空间数据。

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Geographical information systems development and optimize the structure of spatial data closely, raster and vector data efficient conversion of data between the GIS is one of the key technologies.

地理信息系统开发和优化的空间数据结构紧密，光栅和矢量数据之间的地理信息系统数据的有效转换的关键技术之一。

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