Changeset: 56391730
added a culvert
Closed by deryadilmen
Tags
created_by | JOSM/1.5 (13367 en) |
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review_requested | yes |
source | Bing |
Discussion
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Comment from TheSwavu
Cleaned it up a little bit:
1. From aerial imagery this looks like a bridge so changed tagging to bridge. For a culvert you split the water way and tag the bit passing under the road as tunnel=culvert + layer=-1
2. Added surface tags to roads.
3. Fixed wrong name on Califat Trail.
4. Downgraded Trail to track as appears to be possibly on someone's land (there's fences, gates, and has that farm track look) and it far less clear on the imagery than the road
5. Fixed up the alignment to the NSW LPI Imagery which is normally clearer and more accurate than Bing (but not always).
Note that the only definitive way to tell if this is a culvert or a bridge would be to go to the site and see if the stream bed underneath was running on natural surface or if there was something like a concrete surface.
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Comment from deryadilmen
Great, thank you! Did it give any suspicious tag warning when you tagged it as bridge? and for culvert. you actually tag the river, great to know! If I am not sure if it is a culvert or bridge (without site visit), how do I tag it then?
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Comment from TheSwavu
Use your best judgment. Personally I think it's much more important to flag crossings that are fords as these are more likely to be problems for routing. Splitting between a culvert and a bridge doesn't really matter that much other than for map completeness.
As a general rule of thumb a bridge will have some sort of deck, whereas a culvert will usually have the road continue over it on an embankment. Bridges will tend to be larger than culverts. GA has some examples of bridges in their guide: http://www.ga.gov.au/mapspecs/topographic/v6/appendixU_files/appendix_u_trans.html
My comment was really preempting other mappers that like to argue the toss about whether a particular structure is a bridge or a culvert.
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Comment from deryadilmen
The link was a very useful source, thank you !
Ways (1)
Nodes (1)
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