Patch area (Area and edge metric)
lsm_p_area(landscape, directions)# S3 method for RasterLayer
lsm_p_area(landscape, directions = 8)
# S3 method for RasterStack
lsm_p_area(landscape, directions = 8)
# S3 method for RasterBrick
lsm_p_area(landscape, directions = 8)
# S3 method for stars
lsm_p_area(landscape, directions = 8)
# S3 method for list
lsm_p_area(landscape, directions = 8)
Raster* Layer, Stack, Brick or a list of rasterLayers.
The number of directions in which patches should be connected: 4 (rook's case) or 8 (queen's case).
tibble
$$AREA = a_{ij} * (\frac{1} {10000})$$ where \(a_{ij}\) is the area in square meters.
AREA is an 'Area and edge metric' and equals the area of each patch in hectares. The lower limit of AREA is limited by the resolution of the input raster, i.e. AREA can't be smaller than the resolution squared (in hectares). It is one of the most basic, but also most important metrics, to characterise a landscape. The metric is the simplest measure of composition.
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: http://www.umass.edu/landeco/research/fragstats/fragstats.html
lsm_c_area_mn
,
lsm_c_area_sd
,
lsm_c_area_cv
,
lsm_c_ca
,
lsm_l_area_mn
,
lsm_l_area_sd
,
lsm_l_area_cv
,
lsm_l_ta
# NOT RUN {
lsm_p_area(landscape)
# }
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