lsm_l_ta {landscapemetrics} | R Documentation |
TA (landscape level)
Description
Total area (Area and edge metric)
Usage
lsm_l_ta(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
CA = sum(AREA[patch_{ij}])
where AREA[patch_{ij}]
is the area of each patch in hectares.
TA is an 'Area and edge metric'. The total (class) area sums the area of all patches in the landscape. It is the area of the observation area.
Units
Hectares
Range
TA > 0
Behaviour
Approaches TA > 0 if the landscape is small and increases, without limit, as the size of the landscape increases.
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
Examples
landscape <- terra::rast(landscapemetrics::landscape)
lsm_l_ta(landscape)