earth.bear: Bearings Between Geographic Locations

In fossil: Palaeoecological and Palaeogeographical Analysis Tools

Description

Calculate the bearing in degrees clockwise from True North between any two points on the globe.

Usage

earth.bear(long1, lat1, long2, lat2)

Arguments

long1	Longitude of site 1
lat1	Latitude of site 1
long2	Longitude of site 2
lat2	Latitude of site 2

Details

Calculate the bearing in degrees clockwise from True North between any two points on the globe. Primarily designed to be used with other included geographic tools.

Value

Returns a value in degrees from True North between two geographic points.

Author(s)

Matthew Vavrek

References

Haversine formula from Math Forums: Ask Dr. Math at http://mathforum.org/dr.math/

See Also

earth.poly

Examples

earth.bear(-100, 30, 20, -40)

Example output

Loading required package: sp
Loading required package: maps
Loading required package: shapefiles
Loading required package: foreign

Attaching package: 'shapefiles'

The following objects are masked from 'package:foreign':

    read.dbf, write.dbf

[1] 118.8295

fossil documentation built on March 23, 2020, 5:06 p.m.