distance

Using the Haversine formula to calculate the great-circle distance between 2 points.

Installation

go get -u github.com/ehis/distance

Usage

• distance.GreatCircle() - returns the great-circle distance between 2 points.

// []float64{longitude, latitude}
pt1 := []float64{-180, 40.71427}
pt2 := []float64{180, 40.71427}

d := distance.GreatCircle(pt1, pt2) 

• distance.PointSegment() - return the distance between a point and the closest point on a line segment.

// []float64{x, y}
pt := []float64{3, 2}
pt1 := []float64{-2, 1}
pt2 := []float64{5, 3}
d := distance.PointSegment(pt, pt1, pt2)

Inspiration from distance - an elixir library