环境地理信息系统作为地理信息系统的一个专题研究领域有其独特性。

Environmental geographic information system (EGIS) is a specific subject research domain in geographic information system with its peculiar characteristic.

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地理信息系统软件主要应用于地理信息系统部门，所用到的坐标系与地图投影密切相关。

The GIS software is mainly applied to the department of Geography Information system. Its coordinate system is closely related with map projection.

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多时态地理信息系统(TGIS)是地理信息系统(GIS)研究的前沿。

Temporal geographical information system (TGIS) is a research focus of geographical information system (GIS).

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