| lsm_p_perim {landscapemetrics} | R Documentation |
PERIM (patch level)
Description
Perimeter (Area and edge metric)
Usage
lsm_p_perim(landscape, directions = 8)
Arguments
landscape |
A categorical raster object: SpatRaster; Raster* Layer, Stack, Brick; stars or a list of SpatRasters. |
directions |
The number of directions in which patches should be connected: 4 (rook's case) or 8 (queen's case). |
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).
Because the metric is based on distances or areas please make sure your data
is valid using check_landscape.
Units
Meters
Range
PERIM > 0
Behaviour
Increases, without limit, as patch size and complexity increases.
Value
tibble
References
McGarigal K., SA Cushman, and E Ene. 2023. FRAGSTATS v4: Spatial Pattern Analysis Program for Categorical Maps. Computer software program produced by the authors; available at the following web site: https://www.fragstats.org
Examples
landscape <- terra::rast(landscapemetrics::landscape)
lsm_p_perim(landscape)