lsm_c_ed: ED (class level) In landscapemetrics: Landscape Metrics for Categorical Map Patterns

Description

Edge Density (Area and Edge metric)

Usage

 1 lsm_c_ed(landscape, count_boundary = FALSE, directions = 8) 

Arguments

 landscape Raster* Layer, Stack, Brick, SpatRaster (terra), stars, or a list of rasterLayers. count_boundary Count landscape boundary as edge. directions The number of directions in which patches should be connected: 4 (rook's case) or 8 (queen's case).

Details

ED = \frac{∑ \limits_{k = 1}^{m} e_{ik}} {A} * 10000

where e_{ik} is the total edge length in meters and A is the total landscape area in square meters.

ED is an 'Area and Edge metric'. The edge density equals the sum of all edges of class i 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 aggregation of the same class 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.

Units

Meters per hectare

ED >= 0

Behaviour

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

tibble

References

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_te, lsm_l_ta,
lsm_l_ed

Examples

 1 lsm_c_ed(landscape) 

landscapemetrics documentation built on Sept. 5, 2021, 5:20 p.m.