地形图的测绘和应用是普通测量学的核心内容之一。
Topographic mapping and application of an ordinary surveying one of the core content.
它可以下载的小地砖，并将它们保存到您的硬盘，其中包括普通地图，卫星地图，混合地图和地形图。
It can download the small tiles and save them to your hard disk, including the normal maps, satellite maps, hybrid maps and terrain maps.
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