Coefficient of variation of patch area (Area and edge metric)
lsm_l_area_cv(landscape, directions = 8)tibble
Raster* Layer, Stack, Brick, SpatRaster (terra), stars, or a list of rasterLayers
The number of directions in which patches should be connected: 4 (rook's case) or 8 (queen's case).
$$AREA_{CV} = cv(AREA[patch_{ij}])$$ where \(AREA[patch_{ij}]\) is the area of each patch in hectares.
AREA_CV is an 'Area and Edge metric'. The metric summarises the landscape as the Coefficient of variation of all patches in the landscape. The metric describes the differences among patches in the landscape and is easily comparable because it is scaled to the mean.
Hectares
AREA_CV >= 0
Equals AREA_CV = 0 if all patches are identical in size. Increases, without limit, as the variation of patch areas increases.
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: https://www.umass.edu/landeco/
lsm_p_area,
cv,
lsm_c_area_mn,
lsm_c_area_sd,
lsm_c_area_cv,
lsm_l_area_mn,
lsm_l_area_sd