Compute pairwise distances between points

Calculate the distance between each pair of geometries in origin and dest. These functions differ in the metric space used for the calculation.

Usage

ga_dist_euclidean_pairwise(origin, dest)

ga_dist_haversine_pairwise(origin, dest)

ga_dist_geodesic_pairwise(origin, dest)

ga_dist_rhumb_pairwise(origin, dest)

Arguments

origin

a GeoArrow geometry array for ga_dist_euclidean_pairwise(), a point array for the others

dest

a GeoArrow array matching origin; length 1 or the same length

Value

a double vector of distance values

Details

ga_dist_euclidean_pairwise() measures between geometries of any type, so the distance from a point to the nearest edge of a polygon is one call. The spherical and ellipsoidal metrics take points only, because geo defines them between points alone.

References

Distance, Euclidean, Haversine, Geodesic, Rhumb

See also

Other distance: ga_cross_distance(), ga_dist_frechet_pairwise(), ga_dist_hausdorff_pairwise(), ga_dist_vincenty_pairwise()

Examples

# Raleigh to Charlotte, and Raleigh to Wilmington
origin <- ga_xy(c(-78.6382, -78.6382), c(35.7796, 35.7796))
dest <- ga_xy(c(-80.8431, -77.9447), c(35.2271, 34.2257))

# degrees, then meters
as.vector(ga_dist_euclidean_pairwise(origin, dest))
#> [1] 2.273068 1.701631
as.vector(ga_dist_geodesic_pairwise(origin, dest))
#> [1] 209216.6 183645.3