MapLibre GL Teritorio Cluster

Render native MapLibre GL JS clusters as HTML marker.

Render:

• HTML cluster
• HTML group marked as small cluster or last zoom level
• 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

Add to you project (or use CDN).

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

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

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

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, set a value for clusterMaxZoom
        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)
  })

  // Render feature on map data updates
  map.on('data', (e) => {
    if (e.sourceId !== 'points' || !e.isSourceLoaded)
      return;

    map.on('move', TeritorioCluster.render);
    map.on('moveend', TeritorioCluster.render);
    TeritorioCluster.render()
  });
})

// Create whatever HTML element you want as Cluster
const clusterRender = (element: HTMLDivElement, props: MapGeoJSONFeature['properties'], size?: number): void => {}

// Create whatever HTML element you want as individual Marker
const displayMarker = (element: HTMLDivElement, feature: MapGeoJSONFeature, size?: number): void => {}

// Create whatever HTML element you want as Pin Marker
const displayPinMarker = (coords: LngLatLike, offset: Point): Marker => {}

API

• TeritorioCluster
  • Parameters
  • Options
  • 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 | Zoom level at which we force the rendering of the Unfolded Cluster | ❌ | 17 | | clusterRenderFn | (element: HTMLDivElement, props: MapGeoJSONFeature['properties']): void | Cluster render function | ❌ | src/utils/helpers.ts/clusterRenderDefault() | | 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() | | 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 | ❌ | 5 | | pinMarkerRenderFn | (coords: LngLatLike, offset: Point): Marker | Pin Marker render function | ❌ | src/utils/helpers.ts/pinMarkerRenderDefault() |

addEventListener

Listen to feature click and return a maplibregl.Feature for external control.

TeritorioCluster.addEventListener('click', (e) => {
  console.log(e.detail.selectedFeature)
})

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