arcdist: Geographical distance computations
In geo: Draw and Annotate Maps, Especially Charts of the North Atlantic

Description Usage Arguments Value See Also Examples

Computes distances between lat/lon data points.

1	arcdist(lat, lon, lat1 = NULL, lon1 = NULL, scale = "nmi")

`lat`	Latitude of first coordinate or list with lat, lon of first coordinate.
`lon`	Longitude of first coordinate or list with lat, lon of second coordinate.
`lat1,lon1`	If lat and lon are vectors of lat,lon positions, then lat1 and lon1 must be given as the second set of positions.
`scale`	`nmi` returns value in nautical miles, any other value in kilometers

A single vector of distances between pairs of points is returned

geoplot, geotext, selpos,

pos1 <- list(lat = c(65, 66), lon = c(-19, -20))
  pos2 <- list(lat = c(64, 65), lon = c(-19, -20))
  dists <- arcdist(pos1, pos2)         # pos1 and pos2 are lists of coordinates.
  lat <- c(65, 66)
  lon <- c(-19, -20)
  lat1 <- c(64, 65)
  lon1 <- c(-19, -20)
  dists <- arcdist(lat, lon, lat1, lon1) # Input in vector format.