Raster* Layer, Stack, Brick or a list of rasterLayers.
Value
tibble
Details
$$PR = m$$
where \(m\) is the number of classes
PR is a 'Diversity metric'. It is one of the simplest diversity and composition measures.
However, because of its absolute nature, it is not comparable among landscapes with
different total areas.
Units
None
Range
PR >= 1
Behaviour
Equals PR = 1 when only one patch is present and increases, without
limit, as the number of classes increases
References
McGarigal, K., SA Cushman, and E Ene. 2012. FRAGSTATS v4: Spatial Pattern Analysis
Program for Categorical and Continuous Maps. Computer software program produced by
the authors at the University of Massachusetts, Amherst. Available at the following
web site: http://www.umass.edu/landeco/research/fragstats/fragstats.html