lsm_p_area: AREA (patch level)

Description Usage Arguments Details Value References See Also Examples

View source: R/lsm_p_area.R

Description

Patch area (Area and edge metric)

Usage

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

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

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

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

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

## S3 method for class 'list'
lsm_p_area(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 = a_{ij} * (\frac{1} {10000})

where a_{ij} is the area in square meters.

AREA is an 'Area and edge metric' and equals the area of each patch in hectares. The lower limit of AREA is limited by the resolution of the input raster, i.e. AREA can't be smaller than the resolution squared (in hectares). It is one of the most basic, but also most important metrics, to characterise a landscape. The metric is the simplest measure of composition.

Units

Hectares

Range

AREA > 0

Behaviour

Increases, without limit, as the patch size 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_c_area_mn, lsm_c_area_sd, lsm_c_area_cv, lsm_c_ca,
lsm_l_area_mn, lsm_l_area_sd, lsm_l_area_cv, lsm_l_ta

Examples

1

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