Edge Density (Area and Edge metric)
lsm_l_ed(landscape, count_boundary = FALSE, directions = 8)tibble
A categorical raster object: SpatRaster; Raster* Layer, Stack, Brick; stars or a list of SpatRasters.
Count landscape boundary as edge
The number of directions in which patches should be connected: 4 (rook's case) or 8 (queen's case).
$$ED = \frac{E} {A} * 10000$$ where \(E\) is the total landscape edge in meters and \(A\) is the total landscape area in square meters.
ED is an 'Area and Edge metric'. The edge density equals all edges in the landscape
in relation to the landscape area. The boundary of the landscape is only included in the
corresponding total class edge length if count_boundary = TRUE.
The metric describes the configuration of the landscape, e.g. because an overall aggregation
of classes will result in a low edge density. The metric is standardized to the
total landscape area, and therefore comparisons among landscapes with different total
areas are possible.
Because the metric is based on distances or areas please make sure your data
is valid using check_landscape.
Meters per hectare
ED >= 0
Equals ED = 0 if only one patch is present (and the landscape boundary is not included) and increases, without limit, as the landscapes becomes more patchy
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
lsm_l_te,
lsm_l_ta,
lsm_c_ed
landscape <- terra::rast(landscapemetrics::landscape)
lsm_l_ed(landscape)
Run the code above in your browser using DataLab