Map Projection & GIS 投影与GIS
The GIS software is mainly applied to the department of Geography Information system. Its coordinate system is closely related with map projection.
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 transformation of map projection is the base for mapping theory and an important component of GIS.
地图投影变换是地图制图理论的基础，也是GIS的重要组成部分。
A common statement that I hear in GIS is the following "My map doesn't have a projection", but this is simply not possible (unless you have a good old rotating globe).
有种说法我经常在GIS圈子里听到：“我的地图没有投影”，但实际上这决不可能(除非你的地图是一个可以转动的地球仪)。
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