Google Distance Matrix API Library for Go

This library allows you obtain the distance and travel times between multiple origins and destinations via various travel methods. The library handles Google API rate limiting and max encoded url length for you so you can just implement and enjoy :D

Limitations found here https://developers.google.com/maps/documentation/distancematrix/#Limits

Full details of the Google Matrix API is here https://developers.google.com/maps/documentation/distancematrix

Installation

go get github.com/jondunning/gogoogledm

Usage

package main

import (
    "fmt"
    . "github.com/jondunning/gogoogledm"
)

func main() {
    apiKey := ""               //obtain your key from Google Developers Console
    accountType := FreeAccount //FreeAccount or GoogleForWorkAccount
    languageCode := "en-GB"    //codes available here https://developers.google.com/maps/faq#languagesupport
    unitSystem := ImperialUnit //ImperialUnit or MetricUnit
    api := NewDistanceMatrixAPI(apiKey, accountType, languageCode, unitSystem)

    origins := []Coordinates{
        Coordinates{
            Latitude:  55.853551,
            Longitude: -4.311093,
        },
    }

    destinations := []Coordinates{
        Coordinates{
            Latitude:  53.4720286,
            Longitude: -2.3308237,
        },
        Coordinates{
            Latitude:  51.556021,
            Longitude: -0.279519,
        },
    }

    transportMode := Driving //Driving, Walking and Bicycling
    resp, err := api.GetDistances(origins, destinations, transportMode)
    if err != nil {
        panic(err)
    }

    for _, r := range resp.Rows {
        for _, e := range r.Elements {
            fmt.Printf("Status=%s, Distance=%s, Duration=%s", e.Status, e.Distance.Text, e.Duration.Text)
        }
    }
}

Limitations

The library only implements origins and destinations in a coordinate format
Currently only supports Driving, Walking and Bicycling travel modes

Contributing

Fork it!
Create your feature branch: git checkout -b my-new-feature
Commit your changes: git commit -am 'Add some feature'
Push to the branch: git push origin my-new-feature
Submit a pull request :D

Testing

Various tests included, just run;

go test