bearing: Initial bearing between two points

In drodriguezperez/whereiam: whereiam: Geolocation package and spherical trigonometry calculations

Description

Calculate the initial bearing between two points. This bearing which if followed in a straight line along a great-circle arc will take you from the start point to the end point. The point can be calculated along a great-circle or a rhumb line.

Usage

  bearing(...)

  ## Default S3 method:
 bearing(latitude1, longitude1,
    latitude2, longitude2, line = "greatcircle", ...)

  ## S3 method for class 'Coordinate'
 bearing(coordinate1, coordinate2,
    line = "greatcircle", ...)

Arguments

latitude1	the first latitude coordinate
longitude1	the first longitude coordinate
latitude2	the second latitude coordinate
longitude2	the second longitude coordinate
coordinate1	the first coordinate class variable
coordinate2	the second coordinate class variable
line	a string with the line used to calculate greatcircle or rhumb
...	other arguments

References

http://www.movable-type.co.uk/scripts/latlong.html

Examples

cord1 <- Coordinate(43, -8)
cord2 <- Coordinate(42, -7)

# Using great-circle
brg   <- bearing(cord1, cord2)

# Using rhumb
brg   <- bearing(cord1, cord2, line = 'rhumb')

drodriguezperez/whereiam documentation built on May 15, 2019, 2:42 p.m.