Glossary for Geospatial Science

decision rule:  The criterion used to assign cells to a prototype feature in TNTmips feature mapping.  Cells in the image are tested against the decision rule, and those that match are highlighted as prototypes.  You select the desired decision rule when setting up the raster objects to be analyzed by feature mapping.  A simple decision rule would be to compare the three color values of each cell on the display to three color values known to occur in the target feature.