lsm_c_cpland | R Documentation |

Core area percentage of landscape (Core area metric)

```
lsm_c_cpland(
landscape,
directions = 8,
consider_boundary = FALSE,
edge_depth = 1
)
```

`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). |

`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 |

`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.

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

.

Percentage

0 <= CPLAND < 100

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.

tibble

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

`lsm_p_core`

and `lsm_l_ta`

```
landscape <- terra::rast(landscapemetrics::landscape)
lsm_c_cpland(landscape)
```

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