This new map provides contiguous topographic detail over a region approximately 311 miles by 249 miles (500 kilometers by 400 kilometers).

这张新地图给出了附近大约500千米乘400千米范围的地形。

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This paper discussed in detail algorithm of geometric rectification by scanned topographic map based on teaching model with least squares method to heighten image quality and data accuracy.

针对扫描矢量化这一数据采集手段，以提高图像质量、数据精度为目的，以教学模型为基础，利用最小二乘原理，详细讨论了扫描后的地形图几何纠正算法。

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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)