landscapemetrics (version 1.4.4)

lsm_l_pr: PR (landscape level)

Description

Patch richness (Diversity metric)

Usage

lsm_l_pr(landscape)
# S3 method for RasterLayer
lsm_l_pr(landscape)
# S3 method for RasterStack
lsm_l_pr(landscape)
# S3 method for RasterBrick
lsm_l_pr(landscape)
# S3 method for stars
lsm_l_pr(landscape)
# S3 method for list
lsm_l_pr(landscape)

Arguments

landscape

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

Examples

# NOT RUN {
lsm_l_pr(landscape)

# }

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