A guy named Pete Goge made an effort to pin all record stores of Hamburg onto a Map with detailed local information about each of them.
At the moment 25 Record Stores are listed, e.g.: Smallville Record Store, Otaku Records, Groove City, etc ....
The map was created with uebermaps, which is a service to remember and save favourite spots and places by collecting them in thematic maps. Afterwards you can easily share them with friends, family or the rest of the world. Besides they got options to edit content (local information) collaboratively ... and a iOS App is soon to be released.