Tag:tunnel=culvert
| tunnel = culvert |
| Description |
|---|
| For a stream/drain/ditch passing under a road. Use it on the section of waterway passing under the road. |
| Rendering in OSM Carto |
| Group: Waterways |
| Used on these elements |
| Useful combination |
| Status: de facto |
| Tools for this tag |
|
A culvert is a device used to channel water. It may be used to allow water to pass underneath a road, railway, or embankment for example. Culverts can be made of many different materials; steel, polyvinyl chloride (PVC) and concrete are the most common. Formerly, construction of stone culverts was common.
Typical culvert is a pipe buried under the road. Very large culverts may be hard to distinguish from bridges. Culverts commonly carry waterway=stream, waterway=drain, and waterway=ditch, but there are also large culverts carrying waterway=river.
tunnel=flooded may be used to map larger and longer tunnels used to channelise any fluid.
How to map
Tag the section of covered waterway, including layer=* as usual for tunnels.
culvert=inverted_siphon may be added for sections of a waterway diving under another waterway.
See tunnel=* for a description of the preferred way of connecting culvert waterways to adjoining waterway sections.
Possible tagging mistakes
See also
- Culvert on Wikipedia
- Water feature#Navigations
- Different types of culverts (Cornell University) [ dead link ]
- The discussion page for details of an earlier OSM tagging system, culvert=yes.