Patch density (Aggregation metric)
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
$$PD = \frac{N} {A} * 10000 * 100$$ 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.