1x1-degree tiles that contain topographic change polygons
![1x1-degree tiles that contain topographic change polygons](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/tc46.gif?itok=PLmLBRTe)
Detailed Description
1x1-degree tiles that contain topographic change polygons. A total of 500 tiles contain change polygons, which represents over 53 percent of the conterminous United States tiles.
See the Significant Topographic Changes in the United States project for more information.
Sources/Usage
Public Domain.