haversine: haversine

In RandallShanePhD/geoPlot: Geocodes street or ip addresses and plots them on a map.

Description

This is the haversine formula for determining distance between coordinated on a globe.

Usage

haversine(xLat, xLon, yLat, yLon)

Arguments

xLat	Position 1 latitude.
xLon	Position 1 longitude.
yLat	Position 2 latitude.
yLon	Position 2 longitude.

Value

The output is a list with the coordinates, distance in kilometers and miles.

xLat	Position 1 latitude.
xLon	Position 1 longitude.
yLat	Position 2 latitude.
yLon	Position 2 longitude.
distKm	Distance between points in kilometers.
distMi	Distance between points in miles.

Note

There is some variation between computations due to the measurement used for the Earth's radius. This implementation uses the mean radius measurement of 6371 km versus the equitorial radius of 6378. Feel free to adjust if your opinion differs!

Author(s)

Randall Shane, PhD
[e-mail]

References

http://en.wikipedia.org/wiki/Haversine_formula
http://www.movable-type.co.uk/scripts/latlong.html
http://www.platoscave.net/blog/2009/oct/5/calculate-distance-latitude-longitude-python/

See Also

degrees2radians, geoAddress, geoIP

Examples

haversine("28.54703","-81.30292","26.93422","-80.09421")

RandallShanePhD/geoPlot documentation built on May 18, 2019, 1:34 p.m.