Overview

Go library for the geometric manipulations in the WGS84 coordinate system.

It uses the Geos library for geometric calculations and Proj to project between coordinate systems.

Quick Start

package main

import (
	"github.com/wboayue/geo"
)

func main() {
    // Distance between coordinates

    a := geo.LatLng{Lng: -10.773746, Lat: 6.287188}
    b := geo.LatLng{Lng: -10.774412, Lat: 6.285524}

    distance_M := a.Distance(b)
    // 198.0

    // Buffering
	circle := a.Buffer(200.0)   // buffer by 200 m -> geo.Circle
	circle.AsRegion()           // converts to geo.Region 
}

Dependencies

This library requires the Geos and Proj C libraries. They can be installed as follows:

OSX

brew install proj geos pkg-config

Ubuntu

apt-get install -y libproj-dev libgeos-dev