mapbox-overlay.md

MapboxOverlay

MapboxOverlay is an implementation of Mapbox GL JS's IControl API. When adding a MapboxOverlay control to an mapbox map, deck.gl layers are rendered in synchronization with the base map layers. This control supports both overlaid and interleaved rendering modes.

Example

Overlaid

import {MapboxOverlay} from '@deck.gl/mapbox';
import {ScatterplotLayer} from '@deck.gl/layers';

const map = new mapboxgl.Map({
  center: [-74.5, 40],
  zoom: 14,
  antialias: true // Improves the rendering quality
});

const overlay = new MapboxOverlay({
  interleaved: false,
  layers: [
    new ScatterplotLayer({
      id: 'my-scatterplot',
      data: [
        {position: [-74.5, 40], size: 100}
      ],
      getPosition: d => d.position,
      getRadius: d => d.size,
      getFillColor: [255, 0, 0]
    })
  ]
});

map.addControl(overlay);

Interleaved

import {MapboxOverlay} from '@deck.gl/mapbox';
import {ScatterplotLayer} from '@deck.gl/layers';

const map = new mapboxgl.Map({
  center: [-74.5, 40],
  zoom: 14,
  antialias: true // Improves the rendering quality
});

const overlay = new MapboxOverlay({
  interleaved: true,
  layers: [
    new ScatterplotLayer({
      id: 'my-scatterplot',
      data: [
        {position: [-74.5, 40], size: 100}
      ],
      getPosition: d => d.position,
      getRadius: d => d.size,
      getFillColor: [255, 0, 0],

      beforeId: 'admin_labels' // Insert before this Mapbox layer
    })
  ]
});

map.addControl(overlay);

Using with react-map-gl

The following code demonstrates how to create a React component from MapboxOverlay with react-map-gl@7.x and Typescript:

import {ScatterplotLayer} from '@deck.gl/layers/typed';
import {MapboxOverlay, MapboxOverlayProps} from '@deck.gl/mapbox/typed';
import {useControl} from 'react-map-gl';

import Map, {NavigationControl} from 'react-map-gl';

function DeckGLOverlay(props: MapboxOverlayProps & {
  interleaved?: boolean;
}) {
  const overlay = useControl<MapboxOverlay>(() => new MapboxOverlay(props));
  overlay.setProps(props);
  return null;
}

export default function App() {
  const scatterplotLayer = new ScatterplotLayer({
    id: 'my-scatterplot',
    data: [
      {position: [-74.5, 40], size: 100}
    ],
    getPosition: d => d.position,
    getRadius: d => d.size,
    getFillColor: [255, 0, 0]
  });

  return (
    <Map
      initialViewState={{
        latitude: 40,
        longitude: -74.5,
        zoom: 12
      }}
      mapStyle="mapbox://styles/mapbox/light-v9"
      mapboxAccessToken=""
    >
      <DeckGLOverlay layers={[scatterplotLayer]} />
      <NavigationControl />
    </Map>
  );
}

See react-map-gl's useControl hook. See using deck.gl with Typescript.

Constructor

import {MapboxOverlay} from '@deck.gl/mapbox';
new MapboxOverlay(props);

MapboxOverlay accepts the same props as the Deck class, with the following exceptions:

• views - multi-view support is limited. There is only one MapView that can synchronize with the base map. See the using with multi-views section for details.
• parent / canvas / gl - context creation is managed internally.
• viewState / initialViewState - camera state is managed internally.
• controller - always disabled (to use Mapbox's interaction handlers).

The constructor additionally accepts the following option:

• interleaved (Boolean) - If false, a dedicated deck.gl canvas is added on top of the base map. If true, deck.gl layers are inserted into mapbox-gl's layer stack, and share the same WebGLRenderingContext as the base map. Default is false.

When using interleaved: true, you may optionally add a beforeId prop to a layer to specify its position in the Mapbox layer stack. If multiple deck.gl layers have the same beforeId, they are rendered in the order that is passed into the layers array.

Methods

setProps

const overlay = new MapboxOverlay({
  interleaved: true,
  layers: []
});

map.addControl(overlay);

// Update layers
overlay.setProps({
  layers: [new ScatterplotLayer({...})]
})

Updates (partial) props of the underlying Deck instance. See Deck.setProps.

pickObject

See Deck.pickObject.

pickObjects

See Deck.pickObjects.

pickMultipleObjects

See Deck.pickMultipleObjects.

finalize

Removes the control and deletes all resources.

getCanvas

See Deck.getCanvas. When using interleaved: true, returns the base map's canvas.

Remarks

Multi-view usage

When using MapboxOverlay with multiple views passed to the views prop, only one of the views can match the base map and receive interaction.

With that said, it is still possible to take advantage of deck's multi-view system and render a mapbox base map onto any one MapView of your choice by setting the views array and a layerFilter callback.

• To use multiple views, define a MapView with the id “mapbox”. This view will receive the state that matches the base map at each render.
• If views are provided but the array does not contain this id, then a MapView({id: 'mapbox'}) will be inserted at the bottom of the stack.

import {MapboxOverlay} from '@deck.gl/mapbox';
import {Deck, MapView, OrthographicView} from '@deck.gl/core';
import {ScatterplotLayer} from '@deck.gl/layers';

const map = new mapboxgl.Map({...});

const overlay = new MapboxOverlay({
  views: [
    // This view will be synchronized with the base map
    new MapView({id: 'mapbox'}),
    // This view will not be interactive
    new OrthographicView({id: 'widget'})
  ],
  layerFilter: ({layer, viewport}) => {
    const shouldDrawInWidget = layer.id.startsWith('widget');
    if (viewport.id === 'widget') return shouldDrawInWidget;
    return !shouldDrawInWidget;
  },
  layers: [
    new ScatterplotLayer({
      id: 'my-scatterplot',
      data: [
        {position: [-74.5, 40], size: 100}
      ],
      getPosition: d => d.position,
      getRadius: d => d.size,
      getFillColor: [255, 0, 0]
    }),
    new ScatterplotLayer({
      id: 'widget-scatterplot',
      data: [
        {position: [0, 0], size: 100}
      ],
      getPosition: d => d.position,
      getRadius: d => d.size,
      getFillColor: [255, 0, 0]
    })
  ]
});

map.addControl(overlay);