lsm_l_ta {landscapemetrics}

TA (landscape level)

Description

Total area (Area and edge metric)

Usage

lsm_l_ta(landscape, directions = 8)

Arguments

landscape

A categorical raster object: SpatRaster; Raster* Layer, Stack, Brick; stars or a list of SpatRasters.

directions

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

Details

CA = sum(AREA[patch_{ij}])

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

TA is an 'Area and edge metric'. The total (class) area sums the area of all patches in the landscape. It is the area of the observation area.

Because the metric is based on distances or areas please make sure your data is valid using check_landscape.

Units

Hectares

Range

TA > 0

Behaviour

Approaches TA > 0 if the landscape is small and increases, without limit, as the size of the landscape increases.

Value

tibble

References

McGarigal K., SA Cushman, and E Ene. 2023. FRAGSTATS v4: Spatial Pattern Analysis Program for Categorical Maps. Computer software program produced by the authors; available at the following web site: https://www.fragstats.org

See Also

lsm_p_area, sum,
lsm_c_ca

Examples

landscape <- terra::rast(landscapemetrics::landscape)
lsm_l_ta(landscape)