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Filter steps applied to areas of significant elevation differences

By Significant Topographic Changes in the United States
Filter steps applied to areas of significant elevation differences
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Detailed Description

Filter steps applied to areas of significant elevation differences to produce the final set of polygons that delineate topographic surface changes across the conterminous United States.

More information can be found on the Significant Topographic Changes in the United States website.

Sources/Usage

Public Domain.