Perimeter Index(vector data) — vm_c_perim_idx

Calculate Perimeter Index

vm_c_perim_idx_mn(landscape, class_col)

Arguments

landscape: the input landscape image,
class_col: the name of the class column of the input landscape

Value

the function returns tibble with the calculated values in column "value", this function returns also some important information such as level, class, patch id and metric name.

Details

ratio between perimeter of equal-area circle and perimeter of polygon

References

Angel, S., Parent, J., & Civco, D. L. (2010). Ten compactness properties of circles: Measuring shape in geography: Ten compactness properties of circles. The Canadian Geographer / Le Géographe Canadien, 54(4), 441–461. https://doi.org/10.1111/j.1541-0064.2009.00304.x

Examples

vm_c_perim_idx_mn(vector_landscape, "class")
#> # A tibble: 3 × 5
#>   level class id    metric   value
#>   <chr> <chr> <chr> <chr>    <dbl>
#> 1 class 1     NA    perim_mn 0.198
#> 2 class 2     NA    perim_mn 0.210
#> 3 class 3     NA    perim_mn 0.208