Convexity(vector data) — vm_c_convex

Calculate convexity

vm_c_convex_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 convex hull and perimeter of polygon

References

Jiao, L., Liu, Y., & Li, H. (2012). Characterizing land-use classes in remote sensing imagery by shape metrics. ISPRS Journal of Photogrammetry and Remote Sensing, 72, 46–55. https://doi.org/10.1016/j.isprsjprs.2012.05.012

Examples

vm_c_convex_mn(vector_landscape, "class")
#> # A tibble: 3 × 5
#>   level class id    metric  value
#>   <chr> <chr> <chr> <chr>   <dbl>
#> 1 class 1     NA    conv_mn 0.506
#> 2 class 2     NA    conv_mn 0.369
#> 3 class 3     NA    conv_mn 0.325