lsm_l_core_cv: CORE_CV (landscape level)

Description Usage Arguments Details Value References See Also Examples

Description

Coefficient of variation of core area (Core area metric)

Usage

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lsm_l_core_cv(landscape, directions, consider_boundary, edge_depth)

## S3 method for class 'RasterLayer'
lsm_l_core_cv(landscape, directions = 8,
  consider_boundary = FALSE, edge_depth = 1)

## S3 method for class 'RasterStack'
lsm_l_core_cv(landscape, directions = 8,
  consider_boundary = FALSE, edge_depth = 1)

## S3 method for class 'RasterBrick'
lsm_l_core_cv(landscape, directions = 8,
  consider_boundary = FALSE, edge_depth = 1)

## S3 method for class 'stars'
lsm_l_core_cv(landscape, directions = 8,
  consider_boundary = FALSE, edge_depth = 1)

## S3 method for class 'list'
lsm_l_core_cv(landscape, directions = 8,
  consider_boundary = FALSE, edge_depth = 1)

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).

consider_boundary

Logical if cells that only neighbour the landscape boundary should be considered as core

edge_depth

Distance (in cells) a cell has the be away from the patch edge to be considered as core cell

Details

CORE_{CV} = cv(CORE[patch_{ij}])

where CORE[patch_{ij}] is the core area in square meters of each patch.

CORE_CV is a 'Core area metric'. It equals the Coefficient of variation of the core area of each patch in the landscape. The core area is defined as all cells that have no neighbour with a different value than themselves (rook's case). The metric describes the differences among all patches in the landscape and is easily comparable because it is scaled to the mean.

Units

Hectares

Range

CORE_CV >= 0

Behaviour

Equals CORE_CV = 0 if all patches have the same core area. Increases, without limit, as the variation of patch core areas 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

See Also

lsm_p_core, cv,
lsm_c_core_mn, lsm_c_core_sd, lsm_c_core_cv,
lsm_l_core_mn, lsm_l_core_sd

Examples

1

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