lsm_c_area_mn {landscapemetrics} | R Documentation |
AREA_MN (class level)
Description
Mean of patch area (Area and edge metric)
Usage
lsm_c_area_mn(landscape, directions = 8)
Arguments
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). |
Details
AREA_{MN} = mean(AREA[patch_{ij}])
where AREA[patch_{ij}]
is the area of each patch in hectares
AREA_MN is an 'Area and Edge metric'. The metric summarises each class
as the mean of all patch areas belonging to class i. The metric is a simple way
to describe the composition of the landscape. Especially together with the total
class area (lsm_c_ca
), it can also give an an idea of patch structure
(e.g. many small patches vs. few larges patches).
Units
Hectares
Range
AREA_MN > 0
Behaviour
Approaches AREA_MN = 0 if all patches are small. Increases, without limit, as the patch areas increase.
Value
tibble
References
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
See Also
lsm_p_area
,
mean
,
lsm_c_area_cv
,
lsm_c_area_sd
,
lsm_l_area_mn
,
lsm_l_area_sd
,
lsm_l_area_cv
Examples
landscape <- terra::rast(landscapemetrics::landscape)
lsm_c_area_mn(landscape)