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@radarlabs/maplibre-gl-inspect

v1.4.6

Published

Maplibre GL JS plugin for inspecting vector data

Downloads

3

Readme

Maplibre GL Inspect

Maplibre GL Inspect is a fork of Mapbox GL Inspect by lukasmartinelli ( https://github.com/lukasmartinelli/mapbox-gl-inspect ). It was forked to add support for maplibre-gl-js.

Add an inspect control to maplibre-gl-js to view all features of the vector sources and allows hovering over features to see their properties.

Requires maplibre-gl-js (min version 1.15).

Maplibre GL Inspect Preview

Usage

maplibre-gl-inspect is a Maplibre GL JS plugin that you can easily add on top of your map. Check index.html for a complete example.

Make sure to include the CSS and JS files.

When using a CDN

<script src='https://github.com/acalcutt/maplibre-gl-inspect/releases/download/v1.4.6/maplibre-gl-inspect.min.js'></script>
<link href='https://github.com/acalcutt/maplibre-gl-inspect/releases/download/v1.4.6/maplibre-gl-inspect.css' rel='stylesheet' />

When using modules

require('maplibre-gl-inspect/dist/maplibre-gl-inspect.css');
var maplibregl = require('maplibre-gl');
var MaplibreInspect = require('maplibre-gl-inspect');

// Pass an initialized popup to Maplibre GL
map.addControl(new MaplibreInspect({
  popup: new maplibregl.Popup({
    closeButton: false,
    closeOnClick: false
  })
}));

Add Inspect Control

Add the inspect control to your map.

map.addControl(new MaplibreInspect());

Show Inspection Map

Switch to the inspection map by default.

map.addControl(new MaplibreInspect({
  showInspectMap: true
}));

Show only Inspection Mode

Switch to the inspection map by default and hide the inspect button to switch back to the normal map. Check examples/inspect-only.html

map.addControl(new MaplibreInspect({
  showInspectMap: true,
  showInspectButton: false
}));

Disable Popup

Disable the feature Popup in inspection mode and in map mode. Check examples/no-popup.html

map.addControl(new MaplibreInspect({
  showInspectMapPopup: false,
  showMapPopup: false
}));

Custom Popup Function

You can also control the Popup output. Check examples/custom-popup.html

map.addControl(new MaplibreInspect({
  renderPopup: function(features) {
    return '<h1>' + features.length + '</h1>';
  }
}));

Custom Color Function

You are able to control the generated colors and background of the inspection style. Check examples/custom-color-1.html and examples/custom-color-2.html.

var colors = ['#FC49A3', '#CC66FF', '#66CCFF', '#66FFCC'];
map.addControl(new MaplibreInspect({
  backgroundColor: '#000',
  assignLayerColor: function(layerId, alpha) {
    var randomNumber = parseInt(Math.random() * colors.length);
    return colors[randomNumber];
   }
}));

Show just Popup but no Inspect Style

You can also hide the inspect button and enable the popup on the map if just want the popup hovering feature in your normal map but no inspect style. Check examples/no-inspect-style.html.

map.addControl(new MaplibreInspect({
  showInspectButton: false,
  showMapPopup: true
}));

Show Popup only for certain Features

You can pass a queryParameters object structured like the parameters object documented for map.queryRenderedFeatures](https://maplibre.org/maplibre-gl-js-docs/api/map/#map#queryrenderedfeatures). This let's you show the inspect popup for only certain layers. Check examples/query-params.html.

map.addControl(new MaplibreInspect({
  queryParameters: {
    layers: ['composite_road_line']
  }
}));

You can also use this feature to do custom layer filtering.

map.addControl(new MaplibreInspect({
  queryParameters: {
    filter: ['>', 'height', 10]
  }
}));

Less Fidly Popup

If inspecting features is too fiddly for thin lines you can optionally set a custom pixel buffer around the pointer when querying for features to make inspection a bit more forgiving. Check examples/less-fidly.html.

map.addControl(new MaplibreInspect({
  selectThreshold: 50
}));

Show Popup only on Click not on Hovering

Do not show the inspect popup when hovering over the map but only when clicking on the map. Check examples/popup-on-click.html.

map.addControl(new MaplibreInspect({
  showMapPopup: true,
  showMapPopupOnHover: false,
  showInspectMapPopupOnHover: false
}));

Add a Callback for Inspect Toggle Events

Call a function whenever the user toggles the inpect map on or off. Useful for adding inspect state to URL hash. Check examples/url-hash-toggle-callback.html.

map.addControl(new MaplibreInspect({
  toggleCallback: function(showInspectMap) { 
    console.log(`showInspectMap is ${showInspectMap}`);
  }
}));

Develop

Run the linter and watch for changes to rebuild with browserify.

npm install
npm run lint
npm run watch

Create a minified standalone build.

npm install
npm run build