lsm_c_te: TE (class level)

Description Usage Arguments Details Value References See Also Examples

View source: R/lsm_c_te.R

Description

Total (class) edge (Area and Edge metric)

Usage

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lsm_c_te(landscape, count_boundary, directions)

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

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

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

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

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

Arguments

landscape

Raster* Layer, Stack, Brick or a list of rasterLayers.

count_boundary

Include landscape boundary in edge length

directions

The number of directions in which patches should be connected: 4 (rook's case) or 8 (queen's case).

Details

TE = ∑ \limits_{k = 1}^{m} e_{ik}

where e_{ik} is the edge lengths in meters. TE is an 'Area and edge metric'. Total (class) edge includes all edges between class i and all other classes k. It measures the configuration of the landscape because a highly fragmented landscape will have many edges. However, total edge is an absolute measure, making comparisons among landscapes with different total areas difficult. If cound_boundary = TRUE also edges to the landscape boundary are included.

Units

Meters

Range

TE >= 0

Behaviour

Equals TE = 0 if all cells are edge cells. Increases, without limit, as landscape becomes more fragmented

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_p_perim lsm_l_te

Examples

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