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lsm_l_core_mn

CORE_MN (landscape level)

Description

Mean of core area (Core area metric)

Usage

lsm_l_core_mn(
  landscape,
  directions = 8,
  consider_boundary = FALSE,
  edge_depth = 1
)

Arguments

landscape

Raster* Layer, Stack, Brick, SpatRaster (terra), stars, 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

Details

CORE_{MN} = mean(CORE[patch_{ij}])

where CORE[patch_{ij}] is the core area in square meters of each patch.

CORE_MN is a 'Core area metric' and equals the mean of core areas of all patches in the landscape. The core area is defined as all cells that have no neighbour with a different value than themselves (rook's case).

Units

Hectares

Range

CORE_MN >= 0

Behaviour

Equals CORE_MN = 0 if CORE = 0 for all patches. Increases, without limit, as the core area indices 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

Examples

lsm_l_core_mn(landscape)
landscapemetrics

Landscape Metrics for Categorical Map Patterns

v1.5.2
GPL-3
Authors
Maximillian H.K. Hesselbarth [aut, cre] (<https://orcid.org/0000-0003-1125-9918>), Marco Sciaini [aut] (<https://orcid.org/0000-0002-3042-5435>), Jakub Nowosad [aut] (<https://orcid.org/0000-0002-1057-3721>), Sebastian Hanss [aut] (<https://orcid.org/0000-0002-3990-4897>), Laura J. Graham [ctb] (Input on package structure), Jeffrey Hollister [ctb] (Input on package structure), Kimberly A. With [ctb] (Input on package structure), Florian Privé [ctb] (Original author of underlying C++ code for get_nearestneighbour() function), Project Nayuki [ctb] (Original author of underlying C++ code for get_circumscribingcircle and lsm_p_circle), Matt Strimas-Mackey [ctb] (Bugfix in sample_metrics())
Initial release

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