Size reclassification allows polygons to be selected based on their area. For linear features, overall length may be used as the selection criterion.

The contiguity function allows raster GISs to analyze all examples of a particular class (eg., all forest patches) or to operate on the individual examples of that class of data (eg., any particular forest stand).

Contiguity reclassification identifies 'clumps' of raster cells having the same thematic value. Each new clump is assigned a unique value.