Small location picker App.

Displays an initial Point on the map which the user can move around. Whenever the marker is moved a MessageEvent is fired upon which surrounding applications can react.

Query-Params

key	value
lat	Initial-Marker latitude
lng	Initial-Marker longitude
plz	Zip-Code - Fallback to zoom into when no lat/lng was provided

The center point of the region described by plz is determined by a simple query to the overpass API.