lsm_l_lpi | R Documentation |
Largest patch index (Area and Edge metric)
lsm_l_lpi(landscape, directions = 8)
landscape |
Raster* Layer, Stack, Brick, SpatRaster (terra), stars, 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). |
LPI = \frac{\max (a_{ij})} {A} * 100
where max(a_{ij})
is the area of the patch in square meters and A
is the total landscape area in square meters.
The largest patch index is an 'Area and edge metric'. It is the percentage of the landscape covered by the largest patch in the landscape. It is a simple measure of dominance.
Percentage
0 < LPI <= 100
Approaches LPI = 0 when the largest patch is becoming small and equals LPI = 100 when only one patch is present
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: https://www.umass.edu/landeco/
lsm_p_area
,
lsm_l_ta
,
lsm_c_lpi
lsm_l_lpi(landscape)
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