Description Usage Arguments Details Value References Examples

Perimeter (Area and edge metric))

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

`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). |

*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).

Meters

PERIM > 0

Increases, without limit, as patch size and complexity increases.

tibble

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

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