lsm_p_perim: PERIM (patch level)

Description

Perimeter (Area and edge metric))

Usage

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

$$PERIM = p_{ij}$$ where $p_{ij}$ is the perimeter in meters.

PERIM is an 'Area and edge metric'. It equals the perimeter of the patch including also the edge to the landscape boundary. The metric describes patch area (larger perimeter for larger patches), but also patch shape (large perimeter for irregular shapes).

Units

Meters

Range

PERIM > 0

Behaviour

Increases, without limit, as patch size and complexity 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

Run this code

# NOT RUN {
lsm_p_perim(landscape)

# }

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