View source: R/lsm_c_para_cv.R
lsm_c_para_cv | R Documentation |
Coefficient of variation perimeter-area ratio (Shape metric)
lsm_c_para_cv(landscape, directions = 8)
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). |
PARA_{CV} = cv(PARA[patch_{ij}]
where PARA[patch_{ij}]
is the perimeter area ratio of each patch.
PARA_CV is a 'Shape metric'. It summarises each class as the Coefficient of variation of each patch belonging to class i. The perimeter-area ratio describes the patch complexity in a straightforward way. However, because it is not standarised to a certain shape (e.g. a square), it is not scale independent, meaning that increasing the patch size while not changing the patch form will change the ratio.
None
PARA_CV >= 0
Equals PARA_CV = 0 if the perimeter-area ratio is identical for all patches. Increases, without limit, as the variation of the perimeter-area ratio 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_para
,
lsm_c_para_mn
,
lsm_c_para_sd
,
lsm_l_para_mn
,
lsm_l_para_sd
,
lsm_l_para_cv
landscape <- terra::rast(landscapemetrics::landscape)
lsm_c_para_cv(landscape)
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