Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!
Get Started for Free

lsm_l_dcore_mn

DCORE_MN (landscape level)

Description

Mean number of disjunct core areas (Core area metric)

Usage

lsm_l_dcore_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

DCORE_{MN} = mean(NCORE[patch_{ij}])

where NCORE[patch_{ij}] is the number of core areas.

DCORE_MN is an 'Core area metric'. It summarises the landscape as the mean of all patches in the landscape. A cell is defined as core if the cell has no neighbour with a different value than itself (rook's case). NCORE counts the disjunct core areas, whereby a core area is a 'patch within the patch' containing only core cells.

Units

None

Range

DCORE_MN > 0

Behaviour

Equals DCORE_MN = 0 if NCORE = 0 for all patches. Increases, without limit, as the number of disjunct core areas increases.

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_dcore_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

We don't support your browser anymore

Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.