Custom color ramp (color ramp)

This example shows how to create a custom color ramp and use it to visualize a point layer. Download the sample data here.


npm install --save @maptiler/sdk

main.js

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

config.apiKey = 'YOUR_MAPTILER_API_KEY_HERE';
const map = new Map({
    container: 'map',
    zoom: 11.6,
    center: [-119.807, 36.7828],
    style: MapStyle.DATAVIZ.DARK
});

const myCustomRamp = new maptilersdk.ColorRamp({
  stops: [
    { value: 100, color: [252, 222, 156] },
    { value: 500, color: [250, 164, 118] },
    { value: 1000, color: [240, 116, 110] },
    { value: 1500, color: [227, 79, 111] },
    { value: 2000, color: [220, 57, 119] },
    { value: 3000, color: [185, 37, 122] },
    { value: 4000, color: [124, 29, 111] },
  ]
});

map.on('load', async function () {
  await maptilersdk.helpers.addPoint(map, {
    data: 'schools.geojson',
    property: "students",
    pointColor: myCustomRamp,
    pointOpacity: 0.7,
    minPointRadius: 1,
    maxPointRadius: 100,
    showLabel: true,
  });
});

index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="robots" content="noindex">
  <title>Custom color ramp (color ramp) | 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>Color ramp</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: 11.6,
        center: [-119.807, 36.7828],
        style: maptilersdk.MapStyle.DATAVIZ.DARK
    });

    const myCustomRamp = new maptilersdk.ColorRamp({
      stops: [
        { value: 100, color: [252, 222, 156] },
        { value: 500, color: [250, 164, 118] },
        { value: 1000, color: [240, 116, 110] },
        { value: 1500, color: [227, 79, 111] },
        { value: 2000, color: [220, 57, 119] },
        { value: 3000, color: [185, 37, 122] },
        { value: 4000, color: [124, 29, 111] },
      ]
    });

    map.on('load', async function () {
      await maptilersdk.helpers.addPoint(map, {
        data: 'schools.geojson',
        property: "students",
        pointColor: myCustomRamp,
        pointOpacity: 0.7,
        minPointRadius: 1,
        maxPointRadius: 100,
        showLabel: true,
      });
    });

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