How to follow tracked Geese

On several sites of western Europe we caught Greylags and equiped them with GPS-transmitters which you can follow in the web. Click on the links to different sites:

Geese from Großen Meer (Ostfriesland, Niedersachsen, Germany)
Geese from Dümmer (Niedersachsen, Germany)
Geese from the Leineaue (Niedersachsen, Germany
Geese from the Provinz Groningen (The Netherlands)
Geese from Sweden