One of the basic works of an electronic geo - information system is to collect information about geography location of the Earth from one or some maps of the spherical Earth.
电子地理信息系统的关键工作之一是录取地理位置信息，即从科研地图上录取用户关心的某些特殊位置的位置信息。
One of the basic works of an electronic geo - information system is to collect information about geography location of the Earth from one or some maps of the spherical Earth.
电子地理信息系统的关键工作之一是录取地理位置信息，即从科研地图上录取用户关心的某些特殊位置的位置信息。
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