lsm_l_area_cv: AREA_CV (landscape level)

Description

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

Usage

lsm_l_area_cv(landscape, directions)
# S3 method for RasterLayer
lsm_l_area_cv(landscape, directions = 8)
# S3 method for RasterStack
lsm_l_area_cv(landscape, directions = 8)
# S3 method for RasterBrick
lsm_l_area_cv(landscape, directions = 8)
# S3 method for stars
lsm_l_area_cv(landscape, directions = 8)
# S3 method for 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).

Value

tibble

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.

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

Examples

Run this code

# NOT RUN {
lsm_l_area_cv(landscape)

# }

Run the code above in your browser using DataCamp Workspace