dtBearing: dt bearing

In SymbolixAU/spatial.data.table:

Description

Calculates the initial bearing between two pairs of latitude / longitude coordinates

Usage

dtBearing(latFrom, lonFrom, latTo, lonTo, compassBearing = FALSE)

Arguments

latFrom	latitude from
lonFrom	longitude from
latTo	latitude to
lonTo	longitude to
compassBearing	logical indicating whether to return the value in the range 0 - 360

Value

bearing in degrees

Note

The initial bearing is sometimes called the 'forward azimuth', which if followed in a straight line along a great-circle arc will take you from teh start point to the end point

Examples

dtBearing(0,0,0,52)

dtBearing(25, 0, 35, 0)

dtBearing(25, 0, -25, 0)

dtBearing(0, 0, 0, -1)
dtBearing(0, 0, 0, -1, compassBearing = TRUE)

dtBearing(0, 0, 1, -1)

dtBearing(0, 0, 0, 1)

dtBearing(0, 0, 1, -0.001)
dtBearing(0, 0, 1, -0.001, compassBearing = TRUE)

dtBearing(-37,144,-38,145)

SymbolixAU/spatial.data.table documentation built on May 9, 2019, 3:30 p.m.