Glossary for Geospatial Science

external raster:  A raster file that has only been linked to a project file and is being maintained as a separate file.  An external raster 1) is stored in a DOS file, 2) follows a very simple format, and 3) is not stored internally in a project file.  To all TNTmips processes, this object still appears to be a part of a project file.  However, external programs can modify it.