Glossary for Geospatial Science

reference image:� An image on the display used for visual reference that is generated by (or otherwise corresponds to) a raster object or set of raster objects.� For instance, TNTmips image interpretation processes can use either a single raster object or a set of raster objects.� That is, you can use one raster object for the display, and another raster object or set of raster objects for processing.�� In the simplest case, you use the same raster object for both the processing raster object and your reference on the display.� In a more complex case, you use one raster object for the display image, and a whole set of raster objects for processing.� (The processing set may include the display raster.) For instance, you could use a raster object with a composite natural-color image of the study site for the display, while using the seven raster objects containing the spectral bands of the Landsat Thematic Mapper data for processing.� (See also: processing rasters.)