lsm_l_area_cv: AREA_CV (landscape level)

Description Usage Arguments Details Value References See Also Examples

Description

Coefficient of variation of patch area (Area and edge metric)

Usage

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
lsm_l_area_cv(landscape, directions)

## S3 method for class 'RasterLayer'
lsm_l_area_cv(landscape, directions = 8)

## S3 method for class 'RasterStack'
lsm_l_area_cv(landscape, directions = 8)

## S3 method for class 'RasterBrick'
lsm_l_area_cv(landscape, directions = 8)

## S3 method for class 'stars'
lsm_l_area_cv(landscape, directions = 8)

## S3 method for class 'list'
lsm_l_area_cv(landscape, directions = 8)

Arguments

landscape

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

directions

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

Details

AREA_{CV} = cv(AREA[patch_{ij}])

where AREA[patch_{ij}] is the area of each patch in hectares.

AREA_CV is an 'Area and Edge metric'. The metric summarises the landscape as the Coefficient of variation of all patches in the landscape. The metric describes the differences among patches in the landscape and is easily comparable because it is scaled to the mean.

Units

Hectares

Range

AREA_CV >= 0

Behaviour

Equals AREA_CV = 0 if all patches are identical in size. Increases, without limit, as the variation of patch areas increases.

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_area, cv,
lsm_c_area_mn, lsm_c_area_sd, lsm_c_area_cv,
lsm_l_area_mn, lsm_l_area_sd

Examples

1

r-spatialecology/landscapemetrics documentation built on May 20, 2019, noon