Glossary for Geospatial Science

optimization:  The process by which TNTmips assigns display colors to the raster object cell values for display of multiple raster objects for 8-bit (256-color) display modes.  After TNTmips condenses the values, 4096 possible colors remain.  Of the 256 colors that can be displayed on an 8-bit display board, there is a standard set of 64 colors assigned to all raster objects, which are always “known” and available for annotation and vector overlays.  The remaining 192 colors assigned to the color map, are those that occur most frequently in the RGB set of objects being displayed.  The colors in this RGB set that are not found in the 256-member color map are assigned to be displayed as their closest match in the color map.  This process produces a very good natural color image on an 8-bit display board.