**Flood barrier** barrier, levee** [like this][1] - I currently use a track with embankment, but it goes from nowhere to nowhere (because it is not intended for transportation) and it is not primarily a track. It is not a city wall either. "**Road gate**" - a place where the above mentioned barrier is interrupted to allow car traffic and at the same time it be blocked easily with waterbags or something like that. **Flood gate on river** [like this][2] - a gate that can reduce or stop the water flow. It is neither waterway=lock_gate (this is the closest probably), waterway=weir or waterway=dam. I came to a related problems with mapping riverbanks : first if the waterway=riverbank areas correspond to usual waterlevel - how should the area between the usual terrain and the place where water meets dry land mapped - if not riverbank as well or not at all? ([see image][3]) And since the renderers (at least Mapnik) seems to ignore river width for rendering how to make it look less weird when only the part of a river flowing through village is mapped in full width using riverbanks and the rest (before and after) gets rendered much thinner? It is all [here][4] [1]: http://i.idnes.cz/10/053/org/AHA334072_Poland_Europe_Floods_WAR853.jpg [2]: http://img4.rajce.idnes.cz/d0410/2/2572/2572271_22389ea69862f30997202439833e9181/images/2005-16-07-sudkov_004.jpg [3]: http://img221.imageshack.us/img221/2787/riverksec.png [4]: http://www.openstreetmap.org/?lat=49.921774&lon=16.943006&zoom=18&layers=M

**Flood barrier** [like this][1] - I currently use a track with embankment, but it goes from nowhere to nowhere (because it is not intended for transportation) and it is not primarily a track. It is not a city wall either. "**Road gate**" - a place where the above mentioned barrier is interrupted to allow car traffic and at the same time it be blocked easily with waterbags or something like that. **Flood gate on river** [like this][2] - a gate that can reduce or stop the water flow. It is neither waterway=lock_gate (this is the closest probably), waterway=weir or waterway=dam. I came to a related problems with mapping riverbanks : first if the waterway=riverbank areas correspond to usual waterlevel - how should the area between the usual terrain and the place where water meets dry land mapped - if not riverbank as well or not at all? ([see image][3]) And since the renderers (at least Mapnik) seems to ignore river width for rendering how to make it look less weird when only the part of a river flowing through village is mapped in full width using riverbanks and the rest (before and after) gets rendered much thinner? It is all [here][4] [1]: http://i.idnes.cz/10/053/org/AHA334072_Poland_Europe_Floods_WAR853.jpg [2]: http://img4.rajce.idnes.cz/d0410/2/2572/2572271_22389ea69862f30997202439833e9181/images/2005-16-07-sudkov_004.jpg [3]: http://img221.imageshack.us/img221/2787/riverksec.png [4]: http://www.openstreetmap.org/?lat=49.921774&lon=16.943006&zoom=18&layers=M