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)