I'm doing a map to describe trekking paths and I need a button for the geolocation function. I saw ol examples about custom control, button and geolocation, and using the drupal geolocate button I managed to get a map. It works, but I need a marker to locate the position, and I added the following code at row 86, but it doesn't work, I'm doing something wrong?

positionFeature.setStyle(new ol.style.Style({
    image: new ol.style.Circle({
        radius: 6,
        fill: new ol.style.Fill({
        color: '#3399CC'
        stroke: new ol.style.Stroke({
        color: '#fff',
        width: 2

You need to pass the map as a parameter to your control. Map is undefined on the way you pass it. Change the last line of your code

from this

map.addControl(new app.Geolocate());

to this

map.addControl(new app.Geolocate('',map));

check your fiddle with this tiny change here

  • no probs. glad to help. – pavlos Nov 22 '15 at 16:10

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