The is a example how to load a kml file of Google Earth in your article.

{mosmap kml='http://www.reumer.net/images/florida.kml'|overview='1'}

You can set the center of the map closer to your kml-file center instead of using the world map first (Plugin => 2.9). Just set the lat, lon, zoom and leave text empty!

{mosmap lon='-81.227834'|lat='27.107983'|zoom='6'| kml='http://www.reumer.net/images/florida.kml'}