Regional Geography of Topographic Surface Changes

The spatial distribution of the topographic change polygons across the conterminous United States reveals some notable regional differences and patterns of change. Overall, there is a decided concentration of change polygons in the eastern United States, which can be partially explained by the greater population density as compared to the west.

The primary result of the data processing explained in the Methods section is a polygon feature dataset that locates and describes the areas in the conterminous United States that have experienced significant topographic change during the 20th century.