lsm_c_split: SPLIT (class level)

Description Usage Arguments Details Value References See Also Examples

Description

Splitting index (Aggregation metric)

Usage

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lsm_c_split(landscape, directions)

## S3 method for class 'RasterLayer'
lsm_c_split(landscape, directions = 8)

## S3 method for class 'RasterStack'
lsm_c_split(landscape, directions = 8)

## S3 method for class 'RasterBrick'
lsm_c_split(landscape, directions = 8)

## S3 method for class 'stars'
lsm_c_split(landscape, directions = 8)

## S3 method for class 'list'
lsm_c_split(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

SPLIT = \frac{A^2} {∑ \limits_{j = 1}^{n} a_{ij}^2}

where a_{ij} is the patch area in square meters and A is the total landscape area.

SPLIT is an 'Aggregation metric'. It describes the number of patches if all patches of class i would be divided into equally sized patches.

Units

None

Range

1 <= SPLIT <= Number of cells squared

Behaviour

Equals SPLIT = 1 if only one patch is present. Increases as the number of patches of class i increases and is limited if all cells are a patch

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

Jaeger, J. A. 2000. Landscape division, splitting index, and effective mesh size: new measures of landscape fragmentation. Landscape ecology, 15(2), 115-130.

See Also

lsm_p_area, lsm_l_ta,
lsm_l_split

Examples

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