lsm_c_lpi: LPI (class level)

Description Usage Arguments Details Value References See Also Examples

Description

Largest patch index (Area and Edge metric)

Usage

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

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

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

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

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

## S3 method for class 'list'
lsm_c_lpi(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

LPI = \frac{\max \limits_{j = 1}^{n} (a_{ij})} {A} * 100

where max(a_{ij}) is the area of the patch in square meters and A is the total landscape area in square meters.

The largest patch index is an 'Area and edge metric'. It is the percentage of the landscape covered by the corresponding largest patch of each class i. It is a simple measure of dominance.

Units

Percentage

Range

0 < LPI <= 100

Behaviour

Approaches LPI = 0 when the largest patch is becoming small and equals LPI = 100 when only one patch is present

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, lsm_l_ta,
lsm_l_lpi

Examples

1

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