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A simple way to query the Google Maps API from Node.js

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README.md

Google Maps API for Node.js

A simple way to query the Google Maps API from Node.js

This was a quick hack to work with Node.js. Criticism/Suggestions/Patches/PullReq's welcome.

Installation

Installing npm (node package manager)

curl http://npmjs.org/install.sh | sh

Installing googlemaps

npm install googlemaps

Status

APIs implemented:

TODO:

Usage

var gm = require('googlemaps');
var util = require('util');

gm.reverseGeocode('41.850033,-87.6500523', function(err, data){
  util.puts(JSON.stringify(data));
});

gm.reverseGeocode(gm.checkAndConvertPoint([41.850033, -87.6500523]), function(err, data){
  util.puts(JSON.stringify(data));
});

Both examples print: {"status":"OK","results":[{"types":["postal_code"],"formatted_address":"Chicago, IL 60695, USA"...

For the Static Maps API, you can pass in all the required parameters as well as markers, styles, and paths using the formats outlined below.

markers = [
    { 'location': '300 W Main St Lock Haven, PA' },
    { 'location': '444 W Main St Lock Haven, PA',
        'color': 'red',
        'label': 'A',
        'shadow': 'false',
        'icon' : 'http://chart.apis.google.com/chart?chst=d_map_pin_icon&chld=cafe%7C996600'
    }
]

styles = [
    { 'feature': 'road', 'element': 'all', 'rules': 
        { 'hue': '0x00ff00' }
    }
]

paths = [
    { 'color': '0x0000ff', 'weight': '5', 'points': 
        [ '41.139817,-77.454439', '41.138621,-77.451596' ]
    }
]

util.puts(gm.staticMap('444 W Main St Lock Haven PA', 15, '500x400', false, false, 'roadmap', markers, styles, paths));

This example prints the URL for the Static Map image: "http://maps.googleapis.com/maps/api/staticmap?center=444%20W%20Main%20St%20Lock%20Haven%20PA&zoom=15&size=500x400&maptype=roadmap&markers=%7C300%20W%20Main%20St%20Lock%20Haven%2C%20PA&markers=%7Ccolor%3Ared%7Clabel%3AA%7Cicon%3Ahttp%3A%2F%2Fchart.apis.google.com%2Fchart%3Fchst%3Dd_map_pin_icon%26chld%3Dcafe%257C996600%7Cshadow%3Afalse%7C444%20W%20Main%20St%20Lock%20Haven%2C%20PA&style=%7Cfeature%3Aroad%7Celement%3Aall%7Chue%3A0x00ff00&path=weight%3A5%7Ccolor%3A0x0000ff%7C41.139817%2C-77.454439%7C41.138621%2C-77.451596&sensor=false"

By giving gm.staticMap an optional callback, you can retreive the static map PNG data:

util.puts(gm.staticMap('444 W Main St Lock Haven PA', 15, '500x400', function(err, data){
  require('fs').writeFileSync('test_map.png', data, 'binary');
}, false, 'roadmap', markers, styles, paths));

You will get a map like:

Some Map

Configuration

To set the configuration you call gm.config(key, value) or gm.config({key: value, .....})

Useful Configuration Options

proxy - set a proxy for http requests

stagger-time - defaults to 200ms - stagger async call times when multiple requests are required

encode-polylines - defaults to true - encodes polylines to the shorter Google format.

google-client-id - used for setting business specific parameters

google-private-key- used for setting business specific parameters


All the googlemaps functions follow this scheme: function(required, callback, optional)

All callbacks are expected to follow: function(error, results) Where the error returned is an Error object.

Please refer to the code, tests and the Google Maps API docs for further usage information.

Contributors

evnm duncanm sugendran JoshSmith grobot regality spatical

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