Description Usage Arguments Details Value References See Also Examples

Landscape shape index (Aggregation metric)

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

*LSI = \frac{E} {\min E}*

where *E* is the total edge length in cell surfaces and *\min E*
is the minimum total edge length in cell surfaces

LSI is an 'Aggregation metric'. It is the ratio between the actual landscape edge length and the hypothetical minimum edge length. The minimum edge length equals the edge length if only one patch would be present.

None

LSI >= 1

Equals LSI = 1 when only one squared patch is present. Increases, without limit, as the length of the actual edges increases, i.e. the patches become less compact.

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

Patton, D. R. 1975. A diversity index for quantifying habitat "edge". Wildl. Soc.Bull. 3:171-173.

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