On 17/09/2010 15:57, Lennard wrote:
On 17-9-2010 16:28, Dave F. wrote:
http://en.wikipedia.org/wiki/Seawall
There appears to be only 7 occurrences of sea wall so I'm wondering if a
different tag is being used, or maybe no-one's mapped them yet.
Has anybody mapped this type of barrier before?
During our import in The Netherlands[1], we're using
man_made=reinforced_slope. This is a kind of placeholder tag until a
more specific (or otherwise better) tag is found to be more common
place, or until a local survey classifies what type of reinforced
slope it is and sets better tags. Better tags don't seem to be in
widespread use, though, or at all.
Reinforced slope was chosen as a direct translation of the dutch
classification in the dataset being imported. Some of these are
actually seawalls, some are the outer side of a dike/levee lining
rivers. Can't use man_made=dyke in the latter case, as that describes
the entire dyke, i.e. two slopes and the top bit.
The idea for this placeholder tag was that a local survey would mean
the object got retagged, and we could recognize by the occurence of
man_made=reinforced_slope that a survey would still be required.
The ones that are actually groynes we have already reclassified as
man_made=groyne during the import, as they're so easy to spot. Same
goes for man_made=breakwater.[2]
Obviously, if man_made=reinforced_slope (and a possible subclassing)
would somehow be adopted as the tag to use world wide, we'd be done. :)
[1] http://wiki.openstreetmap.org/wiki/3dShapes
[2] Tagwatch counts for NL at this moment: groyne (2596), breakwater
(42), reinforced_slope (564).
Thanks for the reply.
I've never been happy using man_made as it's far too general. (instead I
tag buildings as buildings etc..)
reinforced_slope is to vague for me. Sometimes it's just natural
bolders & others it's a vertical wall.
I'm thinking that as it's to protect against the waves/tide it should be
barrier=; & taking from the wiki & general usage (UK) it should be
sea_wall.
barrier=seawall.
Any objections?
Cheers
Dave F.
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