Style a GeoJSON Line layer (polyline helper)

This example demonstrates the process of incorporating and customizing a GeoJSON line layer on the map by utilizing the polyline layer helper. In this specific case, we will generate a line that is purple and has a border in gray. You can access the sample data by downloading the Blue Hills 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: 13,
    center: [-110.75926, 43.72683],
    style: MapStyle.DATAVIZ.DARK
});

map.on('load', async function () {
  await helpers.addPolyline(map, {
    data: 'https://docs.maptiler.com/sdk-js/examples/helper-polyline-simple/blue_hills.geojson',
    outline: true,
    lineColor: "purple",
    lineWidth: 6,
    outlineColor: "#D3DBEC", // mid gray
    outlineWidth: 10,
  });
});

index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="robots" content="noindex">
  <title>Style a GeoJSON Line layer (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: 13,
        center: [-110.75926, 43.72683],
        style: maptilersdk.MapStyle.DATAVIZ.DARK
    });

    map.on('load', async function () {
      await maptilersdk.helpers.addPolyline(map, {
        data: 'https://docs.maptiler.com/sdk-js/examples/helper-polyline-simple/blue_hills.geojson',
        outline: true,
        lineColor: "purple",
        lineWidth: 6,
        outlineColor: "#D3DBEC", // mid gray
        outlineWidth: 10,
      });
    });

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