Using an arbitrary number of DEMs, DEMTools merges them into a single DEM, performing automatic hole filling and DEM reprojection as necessary.

DEMTools can convert coastline vector data into an areal polygon covering the lake/ocean region, using a DEM as the basis for determining the extent of the polygon.

DEMTools will combine two DEMs that cover the same region, using an areal shapefile as a binary mask to decide which of the two DEMs to use for each elevation post. This feature is useful for blending land and bathymetry into a seamless composite DEM.

DEMTools automatically identifies key matchable points in each source DEM, saving users from time- consuming manual selection and measurement. DEM registration applies a novel least-squares matching algorithm for attributed point matching to bring one use-selected DEM into registration with respect to the second DEM.