Exchange Index(vector data)

Calculate Exchange Index

Usage

vm_p_exchange(landscape, class_col = NULL, patch_col = NULL)

Arguments

landscape

the input landscape image,

class_col

the name of the class column of the input landscape

patch_col

the name of the id 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

share of the total area of the shape that is inside the equal-area circle around its centroid

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_p_exchange(vector_patches, "class", "patch")
#> # A tibble: 40 × 5
#>    level class id    metric       value
#>    <chr> <chr> <chr> <chr>        <dbl>
#>  1 patch 1     11    exchange_idx 0.738
#>  2 patch 1     12    exchange_idx 0.870
#>  3 patch 1     13    exchange_idx 0.758
#>  4 patch 1     14    exchange_idx 0.727
#>  5 patch 1     15    exchange_idx 0.909
#>  6 patch 1     16    exchange_idx 0.909
#>  7 patch 1     17    exchange_idx 0.909
#>  8 patch 1     18    exchange_idx 0.833
#>  9 patch 1     19    exchange_idx 0.909
#> 10 patch 1     20    exchange_idx 0.909
#> # ℹ 30 more rows