MapLibre GL Teritorio Cluster

Render native MapLibre GL JS clusters as HTML marker.

Renders:

• HTML cluster
• HTML Unfolded cluster defined by a minimum leaves and min / max zoom threshold
• Pin Marker on feature click

Allow visualization and interaction with all markers, even when superposed. Can display and interact with small cluster without the need to zoom or uncluster.

See the Demo page.

Usage

Install as a dependency

yarn add @teritorio/maplibre-gl-teritorio-cluster

Or use it from CDN

<script type="module" src="https://unpkg.com/@teritorio/maplibre-gl-teritorio-cluster/dist/maplibre-gl-teritorio-cluster.js"></script>

Warning

Set your GeoJson source with clusterMaxZoom: 22 in order to let the plugin handle cluster/individual marker rendering across all zoom level

import { TeritorioCluster } from '@teritorio/maplibre-gl-teritorio-cluster'
import { Map } from 'maplibre-gl'

const map = new Map({
  container: 'map',
  style: {
    version: 8,
    name: 'Empty Style',
    metadata: { 'maputnik:renderer': 'mlgljs' },
    sources: {
      points: {
        type: 'geojson',
        cluster: true,
        clusterRadius: 80,
        clusterMaxZoom: 22, // Required
        data: {
          type: 'FeatureCollection',
          features: [
            {
              type: 'Feature',
              properties: { id: 1 },
              geometry: { type: 'Point', coordinates: [0, 0] }
            },
            {
              type: 'Feature',
              properties: { id: 2 },
              geometry: { type: 'Point', coordinates: [0, 1] }
            }
          ]
        }
      }
    },
    glyphs: 'https://orangemug.github.io/font-glyphs/glyphs/{fontstack}/{range}.pbf',
    layers: [
      {
        id: 'cluster',
        type: 'circle',
        source: 'points'
      }
    ],
    id: 'muks8j3'
  }
})

map.on('load', () => {
  const teritorioCluster = new TeritorioCluster(map, 'points', options)

  // Get feature click event
  teritorioCluster.addEventListener('click', (e) => {
    console.log(e.detail.selectedFeature)
  })
})

// Create whatever HTML element you want as Cluster
function clusterRender(element, props) {}

// Create whatever HTML element you want as individual Marker
function markerRender(element, feature, markerSize) {}

// Create whatever HTML element you want as Pin Marker
function pinMarkerRender(coords, offset) {}

API

• TeritorioCluster
  • Parameters
  • Options
  • Methods
  • addEventListener

TeritorioCluster

Create a new Maplibre GL JS plugin for feature (cluster / individual marker) rendering

Parameters

Name	Type	Description	Required	Default value
map	Map	The Map object represents the map on your page	✅	❌
sourceId	string	The ID of the source. Should be a vector source, preferably of type GeoJSON and not vector tiles	✅	❌
options	object	Options to configure the plugin	❌	undefined

Options

Name	Type	Description	Required	Default value
clusterMaxZoom	number	Maximal zoom level at which we force the rendering of the Unfolded Cluster	❌	17
clusterMinZoom	number	Minimal zoom level at which we force the rendering of the Unfolded Cluster	❌	0
clusterRenderFn	(element: HTMLDivElement, props: MapGeoJSONFeature['properties']): void	Cluster render function	❌	src/utils/helpers.ts/clusterRenderDefault()
fitBoundsOptions	FitBoundsOptions	Options for Map#fitBounds method	❌	{ padding: 20 }
initialFeature	MapGeoJSONFeature	Feature to select on initial rendering	❌	undefined
markerRenderFn	(element: HTMLDivElement, feature: MapGeoJSONFeature, markerSize: number): void	Individual Marker render function	❌	src/utils/helpers.ts/markerRenderDefault()
markerSize	number (in px)	Size of Marker	❌	24
unfoldedClusterRenderFn	(parent: HTMLDivElement, items: MapGeoJSONFeature[], markerSize: number, renderMarker: (feature: MapGeoJSONFeature) => HTMLDivElement, clickHandler: (e: Event, feature: MapGeoJSONFeature) => void) => void	Unfolded Cluster render function	❌	src/utils/helpers.ts/unfoldedClusterRenderSmart()
unfoldedClusterRenderSmart	Mix between Circular and HexaShape shape Unfolded Cluster render function	-	-	-
unfoldedClusterRenderGrid	Grid shape Unfolded Cluster render function function	-	-	-
unfoldedClusterRenderCircle	Circular shape Unfolded Cluster render function function	-	-	-
unfoldedClusterRenderHexaGrid	HexaGrid shape Unfolded Cluster render function function	-	-	-
unfoldedClusterMaxLeaves	number	Unfolded Cluster max leaves number	❌	7
pinMarkerRenderFn	(coords: LngLatLike, offset: Point): Marker	Pin Marker render function	❌	src/utils/helpers.ts/pinMarkerRenderDefault()

Methods

Name	Type	Description
addEventListener	('feature-click', (e: Event) => void)	Listen to feature click and return a MapGeoJSONFeature from e.detail.selectedFeature for external control.
resetSelectedFeature	() => void	Remove selected feature and associated Pin Marker
setBoundsOptions	(options: FitBoundsOptions) => void	Update Map's visible area
setSelectedFeature	(feature: MapGeoJSONFeature) => void	Set selected feature and display Pin Marker on top of it

Dev

Install dependencies

yarn install

Serve the demo page

yarn dev

Requirements

Requires maplibre-gl-js >= v4.0.0.

Contribution

Please see the contribution guide.

Author

Teritorio