Patch density (Aggregation metric)
lsm_l_pd(landscape, directions)# S3 method for RasterLayer
lsm_l_pd(landscape, directions = 8)
# S3 method for RasterStack
lsm_l_pd(landscape, directions = 8)
# S3 method for RasterBrick
lsm_l_pd(landscape, directions = 8)
# S3 method for stars
lsm_l_pd(landscape, directions = 8)
# S3 method for list
lsm_l_pd(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
$$PD = \frac{N} {A} * 10000 * 100$$ where \(N\) is the number of patches and \(A\) is the total landscape area in square meters.
PD is an 'Aggregation metric'. It describes the fragmentation the landscape, however,
does not necessarily contain information about the configuration or composition of the
landscape. In contrast to lsm_l_np
it is standardized to the area and
comparisons among landscapes with different total area are possible.
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
# NOT RUN {
lsm_l_pd(landscape)
# }
Run the code above in your browser using DataLab