<https://forums.geocaching.com/GC/index.php?/topic/141248-creating-custom-topo-maps-for-garmin/#comment-2406753>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forums.geocaching.com/GC/index.php?/topic/141248-creating-custom-topo-maps-for-garmin/>