A plugin for LeafletJS to use Google maps basemaps.
Promises need a polyfill in order to work. See the "Known caveats" section.
maxNativeZoom functionality introduced in v0.5.0 (thanks, @luiscamacho!) requires Leaflet >1.0.3.
html
integrity="sha512-puBpdR0798OZvTTbP4A8Ix/l+A4dHDD0DGqYW6RQ+9jxkRFclaxxQb/SJAWZfWAkuyeQUytO7+7N4QKrDh+drA=="
crossorigin=""/>
integrity="sha512-nMMmRyTVoLYqjP9hrbed9S+FzjZHW5gY1TWCHA5ckwXZBadntCNs8kEqAWdrb9O7rxbCaA4lKTIWjDXZxflOcA=="
crossorigin="">
`
Include the GoogleMutant javascript file:
`html
`
Then, you can create an instance of L.GridLayer.GoogleMutant on your JS code:
`javascript
var roads = L.gridLayer.googleMutant({
type: 'roadmap' // valid values are 'roadmap', 'satellite', 'terrain' and 'hybrid'
}).addTo(map);
`
It's also possible to use custom styling
by passing a value to the styles option, e.g.:
`javascript
var styled = L.gridLayer.googleMutant({
type: 'roadmap',
styles: [
{elementType: 'labels', stylers: [{visibility: 'off'}]},
{featureType: 'water', stylers: [{color: '#444444'}]}
]
}).addTo(map);
`
Installing a local copy
If you don't want to rely on a CDN to load GoogleMutant, you can:
* Fetch it with NPM by running npm install --save leaflet.gridlayer.googlemutant.
* Fetch it with Yarn by running yarn add leaflet.gridlayer.googlemutant.
* We discourage using Bower but, if you must, bower install https://gitlab.com/IvanSanchez/Leaflet.GridLayer.GoogleMutant.git.
You can also download a static copy from the CDN, or clone this git repo.
Known caveats
* hybrid mode prunes tiles before needed for no apparent reason, so the map flickers when there is a zoom change.
* If you are targeting IE11, then include the following before the script element that references
the GoogleMutant javascript file:
`html
`
This will polyfill in Javascript Promises for IE.
* GoogleMutant is meant to provide a reliable (and ToC-compliant) way of loading Google Map's tiles into Leaflet, nothing more.
Motivation
Before GoogleMutant, it was already possible to display Google Maps in Leaflet, but unfortunately the state of the art was far from perfect:
Shramov's Leaflet plugin implementation (as well as an old, not recommended OpenLayers technique) suffer from a big drawback: the basemap and whatever overlays are on top are off sync*. This is very noticeable when dragging or zooming.
* MapGear's implementation with OpenLayers uses a different technique (decorate OL3 with GMaps methods), but has a different set of limitations.
* Avin Mathew's implementation uses a clever timer-based technique, but it requires jQuery and still feels jittery due to the timers.
Before, an instance of the Google Maps JS API was displayed behind the Leaflet container, and synchronized as best as it could be done.
Now, in order to provide the best Leaflet experience, GoogleMutant uses both DOM mutation observers and L.GridLayer` from Leaflet 1.0.0. The basemap tiles are still requested through the Google maps JavaScript API, but they switch places to use Leaflet drag and zoom.