Line outline glow blur symbol (polyline helper)

This example demonstrates the addition of an outline glow blur symbol to enhance the visual appeal of a line layer. To achieve this, the polyline layer helper is employed. To implement this feature, simply download the NY subway lines sample data.


npm install --save @maptiler/sdk

main.js

import { Map, MapStyle, config, helpers } from '@maptiler/sdk';
import '@maptiler/sdk/dist/maptiler-sdk.css';

config.apiKey = 'YOUR_MAPTILER_API_KEY_HERE';
const map = new Map({
    container: 'map',
    zoom: 9.5,
    center: [-73.8931, 40.7396],
    style: MapStyle.DATAVIZ.DARK
});

map.on('load', async function () {
  await helpers.addPolyline(map, {
    data: 'YOUR_MAPTILER_DATASET_ID_HERE',
    // --> Main line
    lineColor: "#fff",       // White
    lineOpacity: 0.7,        // Partially transparent to see the halo color through

    // --> Halo line
    outline: true,           // To create the electric halo, the outline is
    outlineColor: "#d83bff", // purple
    outlineOpacity: 0.5,     // half transparent
    outlineWidth: 15,        // quite large compared to the main line
    outlineBlur: 15,         // and blurry
  });
});

index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="robots" content="noindex">
  <title>Line outline glow blur symbol (polyline helper) | NPM example</title>
  <link rel="stylesheet" href="./style.css">
</head>
<body>
  <div id="map"></div>
  <script type="module" src="./main.js"></script>
</body>
</html>

style.css

body {margin: 0; padding: 0;}
#map {position: absolute; top: 0; bottom: 0; width: 100%;}

<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Polyline helper</title>
<script src="https://cdn.maptiler.com/maptiler-sdk-js/v4.1.0/maptiler-sdk.umd.min.js"></script>
<link href="https://cdn.maptiler.com/maptiler-sdk-js/v4.1.0/maptiler-sdk.css" rel="stylesheet" />
<style>
  body {margin: 0; padding: 0;}
  #map {position: absolute; top: 0; bottom: 0; width: 100%;}
</style>
</head>
<body>
<div id="map"></div>

<script>
    maptilersdk.config.apiKey = 'YOUR_MAPTILER_API_KEY_HERE';
    const map = new maptilersdk.Map({
        container: 'map',
        zoom: 9.5,
        center: [-73.8931, 40.7396],
        style: maptilersdk.MapStyle.DATAVIZ.DARK
    });

    map.on('load', async function () {
      await maptilersdk.helpers.addPolyline(map, {
        data: 'YOUR_MAPTILER_DATASET_ID_HERE',
        // --> Main line
        lineColor: "#fff",       // White
        lineOpacity: 0.7,        // Partially transparent to see the halo color through

        // --> Halo line
        outline: true,           // To create the electric halo, the outline is
        outlineColor: "#d83bff", // purple
        outlineOpacity: 0.5,     // half transparent
        outlineWidth: 15,        // quite large compared to the main line
        outlineBlur: 15,         // and blurry
      });
    });

</script>
</body>
</html>