dist_greatcircle {tectonicr} | R Documentation |
Distance between points
Description
Returns the great circle distance between a location and all grid point in km
Usage
dist_greatcircle(
lat1,
lon1,
lat2,
lon2,
r = earth_radius(),
method = c("haversine", "orthodrome", "vincenty", "euclidean")
)
Arguments
lat1 , lon1 |
numeric vector. coordinate of point(s) 1 (degrees). |
lat2 , lon2 |
numeric vector. coordinates of point(s) 2 (degrees). |
r |
numeric. radius of the sphere (default = 6371.0087714 km, i.e. the radius of the Earth) |
method |
Character. Formula for calculating great circle distance, one of:
|
Value
numeric vector with length equal to length(lat1)
See Also
orthodrome()
, haversine()
, vincenty()
Examples
dist_greatcircle(lat1 = 20, lon1 = 12, lat2 = c(50, 30), lon2 = c(40, 32))
dist_greatcircle(
lat1 = 20, lon1 = 12, lat2 = c(50, 30), lon2 = c(40, 32),
method = "orthodrome"
)
dist_greatcircle(
lat1 = 20, lon1 = 12, lat2 = c(50, 30), lon2 = c(40, 32),
method = "vincenty"
)
dist_greatcircle(
lat1 = 20, lon1 = 12, lat2 = c(50, 30), lon2 = c(40, 32),
method = "euclidean"
)
[Package tectonicr version 0.3.2 Index]