The paper introduced the working principle and main parameters of Digital Mapping Camera(DMC). It discussed the data characteristics of DMC digital aerial photograph.

通过简要介绍数字航摄相机（DMC）的工作原理和基本参数，讨论了DMC数字航片的数据特点。

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The mountain peak collection was one of Google's trickiest mapping projects to photograph, as the adventure team dealt with torrential downpours, mudslides and even a 6.9-magnitute earthquake near Everest in the middle of the night.

CNN: Google Maps climbs world's tallest mountains