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7.5-minute quadrangle maps that contain topographic change polygons

By Significant Topographic Changes in the United States
7.5-minute quadrangle maps that contain topographic change polygons
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Detailed Description

The USGS 7.5-minute quadrangle maps that contain topographic change polygons. These quadrangles are the ones that are candidates for updated topographic mapping. In fact, a number of these areas have already been updated with the high-resolution, high-accuracy data that have recently been integrated into the NED.

Sources/Usage

Public Domain.