gdal_proximity(1) on Linux
The text 1b0f79271369, as Debian 10 (Buster) shipped it.
Produces a raster proximity map.
Flags it lists
-
-co -
-distunits -
-dstband -
-fixed-buf-val -
-maxdist -
-nodata -
-of -
-ot -
-srcband -
-use_input_nodata -
-values