Re: [Tagging] mapping qanats
2013/9/28 Michał Sałaban mic...@salaban.info I realized it is not easy to make a distinction between canal and aqueduct, but we may assume that the latter is usually for drinking water or irrigation of small areas of land. Everything dealing with navigation, flood protection or vast area irrigation would be rather a canal. Yes, it's a fuzzier distinction than I thought. After a bit of reading i guess an aqueduct is any man made structure that carries water, for whatever purpose, even navigating boats. So canal is a type of aqueduct. I like waterway=aqueduct. If it's on a bridge, bridge=yes, if it is on a wall, barrier=wall. Quanat gets a tunnel=yes, and aqueduct=quanat. For the holes maybe something like man_made=shaft? Janko ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] mapping qanats
Wow, I never heard of qanats. man_made=qanat and qanat=shaft sound ok, although I would rather use waterway=qanat. I see there are only 3 man_made=qanats mapped right now, so there is no problems with changing those. Janko 2013/9/27 Michał Sałaban mic...@salaban.info Hi, I've just created a proposal page about tagging qanats: http://wiki.openstreetmap.org/wiki/Proposed_features/Qanat I hope you will help me to find a good way of mapping these features little known in western world :) Cheers, -- Michał ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] mapping qanats
I'm not sure whether this should have its own tag; how different is it from either an underground pipeline or an underground canal? __John ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] mapping qanats
On Fri, Sep 27, 2013 at 1:00 PM, John Sturdy jcg.stu...@gmail.com wrote: Also, wouldn't we be able to use waterway=canal, tunnel=yes (or whatever tag we use for underground waterways)? Possibly combined with qanat=yes? Or perhaps waterway=canal, tunnel=yes, canal=qanat? This makes sense. It also leaves possibility for mapping open qanats, which go on the surface. This happens sometimes in the end sections, before the water gets divided among recipients. Or man_made=pipeline, location=underground, type=water? I think I'd call it a pipeline if the water fills it to the roof of the tunnel, and a canal if there's air above the water (which seems to be the case, as Wikipedia mentions air from the tunnels being used for cooling). Qanats are not pipelines, there's usually plenty of space above the water. Some of them would collapse when filled, as the upper part is not protected against water. If anyone's going to map to that level of detail, will depth refer to the draught of the water channel (depth from bottom to top of the water), or depth of the whole thing below the ground surface? I think it should mean the depth of the bottom of the qanat relative to the ground surface. The depth of water is variable with seasons and of less importance. How do we map the shafts then? It is similar to manhole=* in some way, but also serves for ventilation purposes. -- Michał ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] mapping qanats
man_made=pipeline, pipeline=qanat? This is similar to how the aqueduct page proposes to tag modern aqueducts, but qanats seem a distinct type of structure from aqueducts due to the vertical wells. (And I agree with John's point that it is not really like a pipeline, but I'd argue that OSM often uses terms in a non-literal way to group related features) Brad On Fri, Sep 27, 2013 at 6:44 AM, Janko Mihelić jan...@gmail.com wrote: I think this is quite a unique structure that can't be described with canal. Especially if the main reason is rendering. Canals are not used for drinking water, the concept is entirely different. If I had to use anything, I would use aqueducthttp://wiki.openstreetmap.org/wiki/Aqueduct, but I would rather use waterway=qanat. Janko ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] mapping qanats
Am 27/set/2013 um 12:18 schrieb Matthijs Melissen i...@matthijsmelissen.nl: Also, wouldn't we be able to use waterway=canal, tunnel=yes (or whatever tag we use for underground waterways)? Possibly combined with qanat=yes? I'd rather use something like canal_type=qanat instead of sth looking like an attribute cheers, Martin ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] mapping qanats
On Sep 27, 2013 3:34 PM, Martin Koppenhoefer dieterdre...@gmail.com wrote: Am 27/set/2013 um 12:18 schrieb Matthijs Melissen i...@matthijsmelissen.nl: Also, wouldn't we be able to use waterway=canal, tunnel=yes (or whatever tag we use for underground waterways)? Possibly combined with qanat=yes? I'd rather use something like canal_type=qanat instead of sth looking like an attribute For everyone suggesting this: that seems indeed a better solution than what I proposed. -- Matthijs ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] mapping qanats
On the canal wiki article http://wiki.openstreetmap.org/wiki/Canal it says An artificial open waterway used for transportation, waterpower, or irrigation. I guess we have to add drinking water to that list. When you look at the Wikipedia canal articlehttp://en.wikipedia.org/wiki/Canal, there is nothing remotely similar to a qanat. I really don't understand why we have to flatten complexity of all types of waterways into a few different tags. Janko ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] mapping qanats
On Fri, Sep 27, 2013 at 4:58 PM, Janko Mihelić jan...@gmail.com wrote: When you look at the Wikipedia canal article, there is nothing remotely similar to a qanat. It is not, but https://en.wikipedia.org/wiki/Aqueduct_(water_supply) looks more similar and even lists qanat as a form of aqueduct. Perhaps we could do it like this: waterway=aqueduct and: aqueduct=bridge — for the usual aqueducts placed overground on pillars, aqueduct=surface — for the ground-level ones, e.g. https://en.wikipedia.org/wiki/File:Arizona_cap_canal.jpg aqueduct=qanat — for qanat However it might create confusion with already existing bridge=aqueduct. -- Michał ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] mapping qanats
Am 27.09.2013 um 21:33 schrieb Michał Sałaban mic...@salaban.info: However it might create confusion with already existing bridge=aqueduct. IMHO bridge=aqueduct is nonsense, we also don't use bridge=highway or railway, and aqueducts don't have to be bridges, they are also underground, or on solid walls/foundations. FWIW I am using historic=aqueduct around here for historic aqueducts (I.e. mostly fragments and not a continuous working duct), and would expect sth like man_made as key for working ones, maybe also waterway would be fine. Cheers, Martin ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
Re: [Tagging] mapping qanats
OK, I gathered the three ideas here: http://wiki.openstreetmap.org/wiki/Proposed_features/Qanat#Tagging Any thoughts on it? Preferences? I realized it is not easy to make a distinction between canal and aqueduct, but we may assume that the latter is usually for drinking water or irrigation of small areas of land. Everything dealing with navigation, flood protection or vast area irrigation would be rather a canal. -- Michał ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
[Tagging] mapping qanats
Hi, I've just created a proposal page about tagging qanats: http://wiki.openstreetmap.org/wiki/Proposed_features/Qanat I hope you will help me to find a good way of mapping these features little known in western world :) Cheers, -- Michał ___ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
