lsm_c_pd: PD (class level)

Description

Patch density (Aggregation metric)

Usage

lsm_c_pd(landscape, directions)
# S3 method for RasterLayer
lsm_c_pd(landscape, directions = 8)
# S3 method for RasterStack
lsm_c_pd(landscape, directions = 8)
# S3 method for RasterBrick
lsm_c_pd(landscape, directions = 8)
# S3 method for stars
lsm_c_pd(landscape, directions = 8)
# S3 method for list
lsm_c_pd(landscape, directions = 8)

Arguments

landscape

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

directions

The number of directions in which patches should be connected: 4 (rook's case) or 8 (queen's case).

Value

tibble

Details

$$PD = \frac{n_{i}} {A} * 10000 * 100$$ where $n_{i}$ is the number of patches and $A$ is the total landscape area in square meters.

PD is an 'Aggregation metric'. It describes the fragmentation of a class, however, does not necessarily contain information about the configuration or composition of the class. In contrast to lsm_c_np it is standardized to the area and comparisons among landscapes with different total area are possible.

Units

Number per 100 hectares

Ranges

0 < PD <= 1e+06

Behaviour

Increases as the landscape gets more patchy. Reaches its maximum if every cell is a different patch.

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

Run this code

# NOT RUN {
lsm_c_pd(landscape)

# }

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