View source: R/lsm_c_dcore_cv.R
lsm_c_dcore_cv | R Documentation |
Coefficient of variation number of disjunct core areas (Core area metric)
lsm_c_dcore_cv(
landscape,
directions = 8,
consider_boundary = FALSE,
edge_depth = 1
)
landscape |
A categorical raster object: SpatRaster; Raster* Layer, Stack, Brick; stars or a list of SpatRasters. |
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 |
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 each class as the Coefficient of variation of all patch areas belonging to class i. 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 patches of the same class i in the landscape and is easily comparable because it is scaled to the mean.
None
DCORE_CV >= 0
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.
tibble
McGarigal K., SA Cushman, and E Ene. 2023. FRAGSTATS v4: Spatial Pattern Analysis Program for Categorical Maps. Computer software program produced by the authors; available at the following web site: https://www.fragstats.org
lsm_p_ncore
,
lsm_c_dcore_mn
,
lsm_c_dcore_sd
,
lsm_l_dcore_mn
,
lsm_l_dcore_sd
,
lsm_l_dcore_cv
landscape <- terra::rast(landscapemetrics::landscape)
lsm_c_dcore_cv(landscape)
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