lsm_l_ed: ED (landscape level)

Description Usage Arguments Details Value References See Also Examples

View source: R/lsm_l_ed.R

Description

Edge Density (Area and Edge metric)

Usage

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lsm_l_ed(landscape, count_boundary, directions)

## S3 method for class 'RasterLayer'
lsm_l_ed(landscape, count_boundary = FALSE,
  directions = 8)

## S3 method for class 'RasterStack'
lsm_l_ed(landscape, count_boundary = FALSE,
  directions = 8)

## S3 method for class 'RasterBrick'
lsm_l_ed(landscape, count_boundary = FALSE,
  directions = 8)

## S3 method for class 'stars'
lsm_l_ed(landscape, count_boundary = FALSE,
  directions = 8)

## S3 method for class 'list'
lsm_l_ed(landscape, count_boundary = FALSE,
  directions = 8)

Arguments

landscape

Raster* Layer, Stack, Brick 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{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.

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. 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

See Also

lsm_l_te, lsm_l_ta,
lsm_c_ed

Examples

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r-spatialecology/landscapemetrics documentation built on April 30, 2019, 6:01 a.m.