Description Usage Arguments Details Value References See Also Examples

Perimeter-Area ratio (Shape metric)

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

*PARA = \frac{p_{ij}} {a_{ij}}*

where *p_{ij}* is the perimeter in meters and *a_{ij}* is the
area in square meters.

PARA is a 'Shape metric'. It describes the patch complexity in a straightforward way. However, because it is not standarised to a certain shape (e.g. a square), it is not scale independent, meaning that increasing the patch size while not changing the patch form will change the ratio.

None

PARA > 0

Increases, without limit, as the shape complexity 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

`lsm_p_area`

,
`lsm_p_perim`

,

`lsm_c_para_mn`

,
`lsm_c_para_sd`

,
`lsm_c_para_cv`

,

`lsm_l_para_mn`

,
`lsm_l_para_sd`

,
`lsm_l_para_cv`

1 |

Embedding an R snippet on your website

Add the following code to your website.

For more information on customizing the embed code, read Embedding Snippets.