Determine internal angles along a track

Calculate the angles between subsequent 2-D coordinates using Great Circle distance (spherical) methods.

trackAngle(x)

# S3 method for trip
trackAngle(x)

# S3 method for default
trackAngle(x)

Arguments

x	trip object, or matrix of 2-columns, with x/y coordinates

Value

Vector of angles (degrees) between coordinates.

Details

If x is a trip object, the return result has an extra element for the start and end point of each individual trip, with value NA.

This is an optimized hybrid of "raster::bearing" and gzAzimuth.