Glossary for Geospatial Science

dimensionality:� The number of coregistered images in a project file for one site.� An image contained in one color composite raster has a dimensionality of one.� An image contained in a three-raster RGB set has a dimensionality of three.� A Landsat TM image map for a single date will have a dimensionality of up to seven.

If elevation rasters, panchromatic rasters, and multi-date airphotos are added to the project file, the user will likely want to reduce the dimensionality of the image to simplify analysis and manipulation.� (See also: dimensional reduction)