How to download a KML file from Google Maps API via "mid" param?

Question

I am doing an application where I want to download a KML file of a Google Maps referenced by a "mid" parameter, like this: https://www.google.com/maps/d/u/0/viewer?mid=1Mdlz2iXu_iZCPhUhzKvT2B2j-6E

I can download it manually clicking in the "three dots button" > "Download KML file"but I want to automatize this process.

Is there anyway to do it?

Answer 1

Put http://www.google.com/maps/d/kml?forcekml=1&mid= before the unique identifier:

http://www.google.com/maps/d/kml?forcekml=1&mid=1Mdlz2iXu_iZCPhUhzKvT2B2j-6E

(Related question: Render a My Maps using Google Maps JavaScript API)

code snippet displaying that KML on a map:

function initMap() {
  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 11,
    center: {
      lat: 41.876,
      lng: -87.624
    }
  });

  var ctaLayer = new google.maps.KmlLayer({
    url: 'http://www.google.com/maps/d/kml?forcekml=1&mid=1Mdlz2iXu_iZCPhUhzKvT2B2j-6E',
    map: map
  });
}

/* Always set the map height explicitly to define the size of the div
 * element that contains the map. */

#map {
  height: 100%;
}


/* Optional: Makes the sample page fill the window. */

html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

<div id="map"></div>
<!-- Replace the value of the key parameter with your own API key. -->
<script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&callback=initMap">
</script>