Created
April 2, 2019 14:57
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Radius Filter Example
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Add layer | CARTO</title> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <meta charset="UTF-8"> | |
| <!-- Include CARTO VL JS --> | |
| <script src="https://libs.cartocdn.com/carto-vl/v1.2.4/carto-vl.min.js"></script> | |
| <script src="https://api.tiles.mapbox.com/mapbox-gl-js/v0.52.0/mapbox-gl.js"></script> | |
| <link href="https://api.tiles.mapbox.com/mapbox-gl-js/v0.52.0/mapbox-gl.css" rel="stylesheet" /> | |
| <style> | |
| html, | |
| body { | |
| margin: 0; | |
| } | |
| #map { | |
| position: absolute; | |
| width: 100%; | |
| height: 100%; | |
| z-index: 1; | |
| } | |
| aside.toolbox { | |
| background-color: rgba(255, 255, 255, 0.9); | |
| border-radius: 5px; | |
| display: block; | |
| font-family: 'Roboto'; | |
| height: auto; | |
| padding: 0 24px 24px 24px; | |
| position: absolute; | |
| right: 12px; | |
| top: 12px; | |
| width: 250px; | |
| font-size: 12px; | |
| z-index: 2; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="map"></div> | |
| <aside class="toolbox"> | |
| <div class="box"> | |
| <header> | |
| <h1>Radius</h1> | |
| </header> | |
| <section> | |
| <input class="white-thumb" type="range" id="js-radius-range" min="1" max="90" step="0.1"> | |
| <p id="js-radius"></p> | |
| </section> | |
| </div> | |
| </aside> | |
| <div id="loader"> | |
| <div class="CDB-LoaderIcon CDB-LoaderIcon--big"> | |
| <svg class="CDB-LoaderIcon-spinner" viewBox="0 0 50 50"> | |
| <circle class="CDB-LoaderIcon-path" cx="25" cy="25" r="20" fill="none"></circle> | |
| </svg> | |
| </div> | |
| </div> | |
| <script> | |
| const map = new mapboxgl.Map({ | |
| container: 'map', | |
| style: carto.basemaps.voyager, | |
| center: [-39.913015089260284, 12.52009632002347], | |
| zoom: 1.2, | |
| scrollZoom: false | |
| }); | |
| const nav = new mapboxgl.NavigationControl({ | |
| showCompass: false | |
| }); | |
| map.addControl(nav, 'top-left'); | |
| // Define user | |
| carto.setDefaultAuth({ | |
| username: 'cartovl', | |
| apiKey: 'default_public' | |
| }); | |
| const source = new carto.source.Dataset('populated_places'); | |
| const viz = new carto.Viz(` | |
| @latitude: 12.52009632002347 | |
| @longitude: -39.913015089260284 | |
| @radius: 20 | |
| color: ramp(linear($latitude), sunset) | |
| filter: lt(sqrt(add(abs(pow(sub($latitude, @latitude), 2)), abs(pow(sub($longitude, @longitude), 2)))), @radius) | |
| `); | |
| const layer = new carto.Layer('layer', source, viz); | |
| layer.addTo(map, 'watername_ocean'); | |
| layer.on('loaded', hideLoader); | |
| const $radiusRange = document.getElementById('js-radius-range'); | |
| const $radiusText = document.getElementById('js-radius'); | |
| $radiusRange.addEventListener('input', () => { | |
| const radius = parseInt($radiusRange.value, 10); | |
| viz.variables.radius = $radiusText.innerHTML = radius; | |
| }); | |
| function hideLoader() { | |
| document.getElementById('loader').style.opacity = '0'; | |
| } | |
| </script> | |
| </body> | |
| </html> |
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