Landscape shape index (Aggregation metric)
lsm_c_lsi(landscape, directions)# S3 method for RasterLayer
lsm_c_lsi(landscape, directions = 8)
# S3 method for RasterStack
lsm_c_lsi(landscape, directions = 8)
# S3 method for RasterBrick
lsm_c_lsi(landscape, directions = 8)
# S3 method for stars
lsm_c_lsi(landscape, directions = 8)
# S3 method for list
lsm_c_lsi(landscape, directions = 8)
Raster* Layer, Stack, Brick or a list of rasterLayers.
The number of directions in which patches should be connected: 4 (rook's case) or 8 (queen's case).
tibble
$$LSI = \frac{e_{i}} {\min e_{i}}$$ where \(e_{i}\) is the total edge length in cell surfaces and \(\min e_{i}\) is the minimum total edge length in cell surfaces
LSI is an 'Aggregation metric'. It is the ratio between the actual edge length of class i and the hypothetical minimum edge length of class i. The minimum edge length equals the edge length if class i would be maximally aggregated.
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.
# NOT RUN {
lsm_c_lsi(landscape)
# }
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