lsm_c_ed: ED (class level)

View source: R/lsm_c_ed.R

lsm_c_edR Documentation

ED (class level)

Description

Edge Density (Area and Edge metric)

Usage

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

Arguments

landscape

A categorical raster object: SpatRaster; Raster* Layer, Stack, Brick; stars or a list of SpatRasters.

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{\sum \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

Range

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

Value

tibble

References

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

See Also

lsm_c_te, lsm_l_ta,
lsm_l_ed

Examples

landscape <- terra::rast(landscapemetrics::landscape)
lsm_c_ed(landscape)


landscapemetrics documentation built on Oct. 3, 2023, 5:06 p.m.