lsm_p_perim: PERIM (patch level)

Description Usage Arguments Details Value References Examples

Description

Perimeter (Area and edge metric))

Usage

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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)

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).

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.

Value

tibble

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

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r-spatialecology/landscapemetrics documentation built on May 20, 2019, noon