react-map-gl

react-map-gl provides a React friendly API wrapper around Mapbox GL JS. A webGL based vector tile mapping library.

WARNING: This project is new and the API may change. There also may be Mapbox APIs that haven't yet been exposed.

Overview

Installation

npm install react-map-gl --save

Usage

<MapGL width={400} height={400} latitude={37.7577} longitude={-122.4376}
  zoom={8} onChangeViewport={function(opts) {
    // opts = {latitude, longitude, zoom, bbox}
  }}
/>

Using overlays

react-map-gl provides an overlay API so you can use the builtin visualization overlays, or create your own. Here's an example of using the build in ScatterplotOverlay.

var ScatterplotOverlay = require('react-map-gl/src/overlays/scatterplot.react');
// ...
<MapGL {...mapProps}>
  <ScatterplotOverlay locations={locations} dotRadius={4} globalOpacity={1}
    compositeOperation="screen" />
  // Add additional overlays here...
])

Build in overlays

1. ChoroplethOverlay
2. ScatterplotOverlay
3. DraggablePointsOverlay
4. SVGOverlay
5. CanvasOverlay

Third party overlays

Other third party overlays can also be created. For example, the heatmap-overlay uses webgl-heatmap to create geographic heatmaps.

Example usage:

var HeatmapOverlay = require('react-map-gl-heatmap-overlay');
var cities = require('example-cities');
// ...
    render: function render() {
      return <MapGL ...viewportProps>
        <HeatmapOverlay locations={cities} />
      </MapGL>;
    }

Want to create and share your own overlay? Fork the react-map-gl-example-overlay project to get started.

ImmutableJS all the things

The mapStyle property of the MapGL as well as several of the built in overlay properties must be provided as ImmutableJS objects. This allows the library to be fast since computing changes to props only involves checking if the immutable objects are the same instance.

Development

To develop on this component, install the dependencies and then build and watch the static files.

$ npm install

To serve example app:

$ npm start &
$ open "http://localhost:9966/?access_token="`echo $MapboxAccessToken`

Where echo $MapboxAccessToken returns your Mapbox access token.

Once complete, you can view the component in your browser at localhost:9966. Any changes you make will automatically run the compiler to build the files again.

Disclaimer

This project is not affiliated with either Facebook or Mapbox.

Example Data

1. SF GeoJSON data from: SF OpenData.