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Show the trace position with Elevation profile control

In this step-by-step demonstration, we present a scenario where a marker moves along a specified route on the map. This allows us to synchronize the location of the elevation profile cursor with the marker’s position on the map. This synchronization is made possible through the utilization of the onMove event from the elevation profile control for MapTiler SDK.

Install the npm package.

Create the map style. Add the map style to your stylesheet. The div must have non-zero height.


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

Create a <div> element with a certain id where you want your map to be.

Add <div> tag into your page. This div will be the container where the map will be loaded.
Include the CSS file.

If you have a bundler that can handle CSS, you can import the CSS from @maptiler/sdk/dist/maptiler-sdk.css.
Info

Including the CSS file using a <link> in the head of the document via the CDN is the easiest way.
```
 <link href='https://cdn.maptiler.com/maptiler-sdk-js/{{site.versions.sdk}}/maptiler-sdk.css' rel='stylesheet' />
```

Load the map with the style. Include the following code in your JavaScript.


 import { config, Map, helpers, Marker, MapStyle } from '@maptiler/sdk';
    
 config.apiKey = 'YOUR_MAPTILER_API_KEY_HERE';
 const map = new Map({
     container: 'map', // container's id or the HTML element in which SDK will render the map
     style: MapStyle.OUTDOOR,
     center: [0.57705, 42.68311], // starting position [lng, lat]
     zoom: 12.22 // starting zoom
 });

Replace YOUR_MAPTILER_API_KEY_HERE with your own API key. Make sure to protect the key before you publish it!
Add a GeoJSON trace to the map. Check out the How to Upload GeoJSON to MapTiler tutorial. Download the Maupas Peak hiking sample data
Create a marker and add it to the map.
Import the MapTiler elevation profile control
Instantiate the control and add it to a Map instance, most likely inside a map "load" event callback