Glossary for Geospatial Science

8-bit raster object:� A raster in which each cell is represented by one byte (8 bits) and can therefore assume 256 possible values.� Multi-spectral imagery uses 8 bits to represent the intensity of each spectral band.� A TNTmips project file may contain such a set of 8-bit raster objects of multi-spectral imagery.� Each 8-bit band can be displayed by itself in 256 levels of gray or in individual, complete colors from a 256-color map.� Three 8-bit bands can be selected and used for Red, Green, and Blue intensity values in a composite color image.� With 8-bit display hardware, TNTmips optimizes the color information and displays the composite image in 256 colors.� With 16-bit hardware, TNTmips displays the composite image in 32,768 possible colors.� 24- and 32-bit display hardware can directly handle all 16 million actual colors.