Description Usage Arguments Details Value References See Also Examples

Standard deviation of related circumscribing circle (Shape metric)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | ```
lsm_c_circle_sd(landscape, directions)
## S3 method for class 'RasterLayer'
lsm_c_circle_sd(landscape, directions = 8)
## S3 method for class 'RasterStack'
lsm_c_circle_sd(landscape, directions = 8)
## S3 method for class 'RasterBrick'
lsm_c_circle_sd(landscape, directions = 8)
## S3 method for class 'stars'
lsm_c_circle_sd(landscape, directions = 8)
## S3 method for class 'list'
lsm_c_circle_sd(landscape, directions = 8)
``` |

`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). |

*CIRCLE_{SD} = sd(CIRCLE[patch_{ij}])*

where *CIRCLE[patch_{ij}]* is the related circumscribing circle of each patch.

CIRCLE_SD is a 'Shape metric' and summarises each class as the standard deviation of the related circumscribing circle of all patches belonging to class i. CIRCLE describes the ratio between the patch area and the smallest circumscribing circle of the patch and characterises the compactness of the patch. The metric describes the differences among patches of the same class i in the landscape.

None

CIRCLE_SD >= 0

Equals CIRCLE_SD if the related circumscribing circle is identical for all patches. Increases, without limit, as the variation of related circumscribing circles increases.

tibble

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

Baker, W. L., and Y. Cai. 1992. The r.le programs for multiscale analysis of landscape structure using the GRASS geographical information system. Landscape Ecology 7: 291-302.

`lsm_p_circle`

,
`mean`

,

`lsm_c_circle_mn`

,
`lsm_c_circle_cv`

,

`lsm_l_circle_mn`

,
`lsm_l_circle_sd`

,
`lsm_l_circle_cv`

1 |

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