lsm_c_area_mn: AREA_MN (class level)

Description Usage Arguments Details Value References See Also Examples

Description

Mean of patch area (Area and edge metric)

Usage

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lsm_c_area_mn(landscape, directions)

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

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

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

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

## S3 method for class 'list'
lsm_c_area_mn(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_{MN} = mean(AREA[patch_{ij}])

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

AREA_MN is an 'Area and Edge metric'. The metric summarises each class as the mean of all patch areas belonging to class i. The metric is a simple way to describe the composition of the landscape. Especially together with the total class area (lsm_c_ca), it can also give an an idea of patch structure (e.g. many small patches vs. few larges patches).

Units

Hectares

Range

AREA_MN > 0

Behaviour

Approaches AREA_MN = 0 if all patches are small. Increases, without limit, as the patch areas increase.

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, mean,
lsm_c_area_cv, lsm_c_area_sd,
lsm_l_area_mn, lsm_l_area_sd, lsm_l_area_cv

Examples

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