View source: R/lsm_c_core_sd.R

lsm_c_core_sd | R Documentation |

Standard deviation patch core area (class level)

```
lsm_c_core_sd(
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 |

`CORE_{SD} = sd(CORE[patch_{ij}])`

where `CORE[patch_{ij}]`

is the core area in square meters of each patch.

CORE_SD is a 'Core area metric'. It equals the standard deviation of the core area of each patch belonging to class i. The core area is defined as all cells that have no neighbour with a different value than themselves (rook's case). The metric describes the differences among patches of the same class i in the landscape.

Hectares

CORE_SD >= 0

Equals CORE_SD = 0 if all patches have the same core area. Increases, without limit, as the variation of patch core areas increases.

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`

,
`sd`

,

`lsm_c_core_mn`

,
`lsm_c_core_cv`

,

`lsm_l_core_mn`

,
`lsm_l_core_sd`

,
`lsm_l_core_cv`

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

landscapemetrics documentation built on Oct. 3, 2023, 5:06 p.m.

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