uniDEM supports numerous methods to fill voids that simulate terrain, or linearly fill as required.
The Perimeter Void Fill samples all pixels non-void pixels adjacent to the edge of a void for a consistent elevation and then to applies the sampled elevation to all of the void data.
The elevation can be sampled as a function of statistical measures around the perimeter of each void as follows:
Default shortcut: none
Kernel based fills can be performed on voids of a defined size.
Supported types are:
Default shortcut: none
Fill operation that fills small voids using the curvature of the void edge to provide propagate terrain in a natural way.
Default shortcut: none
Delta Surface is a powerful set of void filling tools inspired by George Kroenung's(NGA) DSF tool.
Delta Surface can be used to fill a DEM with an alternate source, merge neighbouring DEMs in a seamless manner, or bulk adjust sections of the Active DEM with using a copy of itself.
Default shortcut: none
Fills all selected voids with triangles connected to the edge of the void. The triangle size can be modified to increase speed or reduce the visibility of in-filled triangles.
Default shortcut: none