Destination from origin, bearing, distance — ga_dest

Returns the point reached by travelling distance from origin along bearing. Each function uses a different metric space: dest_euclidean treats coordinates as planar, dest_haversine assumes a sphere, dest_geodesic an ellipsoid, and dest_rhumb follows a line of constant bearing.

Usage

ga_dest_rhumb(origin, bearing, distance)

ga_dest_euclidean(origin, bearing, distance)

ga_dest_haversine(origin, bearing, distance)

ga_dest_geodesic(origin, bearing, distance)

Arguments

origin: a GeoArrow point array
bearing: a numeric vector of bearings in degrees; length 1 or the same length as origin
distance: a numeric vector of distances; length 1 or the same length as origin

Value

a GeoArrow point array

References

Destination

Examples

# 100km due north and due east of Raleigh
raleigh <- ga_xy(c(-78.6382, -78.6382), c(35.7796, 35.7796))

geoarrow::as_geoarrow_vctr(
  ga_dest_geodesic(raleigh, bearing = c(0, 90), distance = c(1e5, 1e5))
)
#> <geoarrow_vctr geoarrow.point{struct}[2]>
#> [1] <POINT (-78.6382 36.680799)>     <POINT (-77.5322223 35.7745143)>