lsm_l_dcore_cv: DCORE_CV (landscape level)

Description Usage Arguments Details Value References See Also Examples

Description

Coefficient of variation number of disjunct core areas (Core area metric)

Usage

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lsm_l_dcore_cv(landscape, directions, consider_boundary, edge_depth)

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

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

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

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

## S3 method for class 'list'
lsm_l_dcore_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

DCORE_{CV} = cv(NCORE[patch_{ij}])

where NCORE[patch_{ij}] is the number of core areas.

DCORE_CV is an 'Core area metric'. It summarises the landscape as the Coefficient of variation of all patches belonging to the landscape. A cell is defined as core if the cell has no neighbour with a different value than itself (rook's case). NCORE counts the disjunct core areas, whereby a core area is a 'patch within the patch' containing only core cells. The metric describes the differences among all patches in the landscape and is easily comparable because it is scaled to the mean.

Units

None

Range

DCORE_CV >= 0

Behaviour

Equals DCORE_CV = 0 if all patches have the same number of disjunct core areas. Increases, without limit, as the variation of number of disjunct 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_ncore, cv,
lsm_c_dcore_mn, lsm_c_dcore_sd, lsm_c_dcore_cv,
lsm_l_dcore_mn, lsm_l_dcore_sd

Examples

1

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