In traditional reservoir capacity calculation, a planimeter is used to obtain a reservoir capacity from topographic maps and large scale topographic maps are needed if high accuracy is required.

传统的库容计算方法是在已有的地形图上采用求积仪法进行，当精度要求较高时，需到现场实测更大比例尺的地形图。

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This system can process the topographic maps of arbitrary boundary and all kinds of scale.

该系统能处理任意边界、各种比例尺的地形图。

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On a hunt or on a hike: Using a separate TOPO U.S. 24K DVD or microSD card brings you the highest level of topographic detail available, with maps comparable to 1:24, 000 scale USGS maps, featuring terrain contours, topo elevations, summits, routable roads and trails, parks, coastlines, rivers, lakes and geographical points.

ENGADGET: Four new Oregon touchscreen GPS devices pop up on Garmin's website (updated)