Vertical NNE-SSW cut of the alsatian airspace. In red : controlled airspace (CTR,TMA), no access without air traffic control autorisation. Between the ground level and the lower boundary of the controlled airspace, paragliding is allowed.
<a href="//commons.wikimedia.org/wiki/User:PiRK" title="User:PiRK">PiRK</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>