landscapemetrics (version 1.4.4)

lsm_c_pladj: PLADJ (class level)

Description

Percentage of Like Adjacencies (Aggregation metric)

Usage

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

Arguments

landscape

Raster* Layer, Stack, Brick or a list of rasterLayers.

Value

tibble

Details

$$PLADJ = (\frac{g_{ij}} {\sum \limits_{k = 1}^{m} g_{ik}}) * 100$$ where \(g_{ii}\) is the number of adjacencies between cells of class i and \(g_{ik}\) is the number of adjacencies between cells of class i and k.

PLADJ is an 'Aggregation metric'. It calculates the frequency how often patches of different classes i (focal class) and k are next to each other, and following is a measure of class aggregation. The adjacencies are counted using the double-count method.

Units

Percent

Ranges

0 <= PLADJ <= 100

Behaviour

Equals PLADJ = 0 if class i is maximal disaggregated, i.e. every cell is a different patch. Equals PLADJ = 100 when the only one patch is present.

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_c_pladj(landscape)

# }