landscapemetrics (version 1.4.4)

lsm_c_cpland: CPLAND (class level)

Description

Core area percentage of landscape (Core area metric)

Usage

lsm_c_cpland(landscape, directions, consider_boundary, edge_depth)
# S3 method for RasterLayer
lsm_c_cpland(
  landscape,
  directions = 8,
  consider_boundary = FALSE,
  edge_depth = 1
)
# S3 method for RasterStack
lsm_c_cpland(
  landscape,
  directions = 8,
  consider_boundary = FALSE,
  edge_depth = 1
)
# S3 method for RasterBrick
lsm_c_cpland(
  landscape,
  directions = 8,
  consider_boundary = FALSE,
  edge_depth = 1
)
# S3 method for stars
lsm_c_cpland(
  landscape,
  directions = 8,
  consider_boundary = FALSE,
  edge_depth = 1
)
# S3 method for list
lsm_c_cpland(
  landscape,
  directions = 8,
  consider_boundary = FALSE,
  edge_depth = 1
)

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).

consider_boundary

Logical if cells that only neighbour the landscape boundary should be considered as core

edge_depth

Distance (in cells) a cell has the be away from the patch edge to be considered as core cell

Value

tibble

Details

$$CPLAND = (\frac{\sum \limits_{j = 1}^{n} a_{ij}^{core}} {A}) * 100$$ where \(a_{ij}^{core}\) is the core area in square meters and \(A\) is the total landscape area in square meters.

CPLAND is a 'Core area metric'. It is the percentage of core area of class i in relation to the total landscape area. A cell is defined as core area if the cell has no neighbour with a different value than itself (rook's case). Because CPLAND is a relative measure, it is comparable among landscapes with different total areas.

Units

Percentage

Range

0 <= CPLAND < 100

Behaviour

Approaches CPLAND = 0 if CORE = 0 for all patches. Increases as the amount of core area increases, i.e. patches become larger while being rather simple in shape.

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_core and lsm_l_ta

Examples

# NOT RUN {
lsm_c_cpland(landscape)

# }