Top Ranked Topographic Change Polygon Largest Fill Area
Top ranked topographic change polygon (outlined in yellow): largest fill area (9.79 km2). This mining feature is located in the Iron Range in northern Minnesota near the town of Mountain Iron. From left to right, the images are NED shaded relief, SRTM shaded relief with change polygons overlaid (blue = cut; red = fill), and Landsat image. The dates of the source data for the NED and SRTM are shown. This area is about 5.5 km east-west by 9.7 km north-south.
See the Significant Topographic Changes in the United States project for more information.