Yesterday, as I was wandering around surveying things to map, I came across a sewage pumping station and mapped it as per https://wiki.openstreetmap.org/wiki/Tag:man%20made=pumping%20station?uselang=en-GB
man_made=pumping_station pumping_station=sewage substance=sewage operator=Dŵr Cymru name=Cardigan 2 Sewage Pumping Station Although other updates I made at the same time were rendered, the pumping station wasn't. So I had a look on overpass-turbo to find what others had done. I found two methods that have been used to make pumping stations appear (both seem to be validly mapping what is there rather than being falsehoods to fool the renderer) but which are not hinted at in the wiki page I propose clarifying the wiki page by documenting at least one of these methods, possibly both. However, there may be reasons why this is not a good idea, hence this post. The methods are 1) Tag actual buildings housing pump machinery as building=service as well as man_made=pumping_station etc. This approach can be found here http://www.openstreetmap.org/way/439149633 As you can see, there is a security fence around this which also encloses a tank which is part of the system. 2) Tag an area, which may be a single building, or a fence around one or more buildings (and possibly other stuff) as landuse=industrial. This approach can be found here: http://www.openstreetmap.org/way/488574374 Of the two methods, the latter seems better to me. The pumping station I found consists of two buildings, an array of 5 or 6 pairs of rectangular manholes, and a large metal A-frame that can be moved over the manhole (I think it's for attaching a hoist to remove large objects that find their way into the system). It is the assemblage of those things which comprise the pumping station and one (possibly both) of those buildings are pump houses. If I used method 1 I'd have to flag both buildings as pumping stations and ignore that the manholes are an integral part of the system. With method 2 I just mark the whole thing as a pumping station and have the option of mapping the buildings as building=service if I wanted to give that level of detail. However, a little research shows that there is another pumping station in the area which is just a relatively small metal cabinet, and so landuse=industrial seems inappropriate. For comparison I found photos of both online. The first is http://www.geograph.org.uk/photo/3264175 although it's out of date as it doesn't have the second building, there are more manhole covers now and the A-Frame has been painted bright yellow. The second is https://www.geograph.org.uk/photo/4543486 (I won't be mapping that one until I've checked it out for myself). It seems to me the options for changing the documentation are: 1) Do nothing. 2) Document method 1 but not method 2. 3) Document method 2 but not method 1. 4) Document both methods, noting that both are seen in the wild, but do not express a preference. 5) Document both methods, noting that both are seen in the wild, but say that method 1 is preferred. 6) Document both methods, noting that both are seen in the wild, but say that method 2 is preferred, at least for installations with multiple objects. 7) Other. My preference is for option 6. Having hung out here for a while, I am sure some people will disagree. :) With any luck there will be a consensus I can go with. Note: there's a side-issue here. Is landuse=industrial appropriate? I would not regard it as industrial but at the moment we don't have any value more appropriate. Also landuse=industrial is used for other infrastructure such as electrical substations and sewage treatment facilities. Therefore I don't intend to deal with that issue at this time but bring it up to show I'm aware of it. -- Paul
_______________________________________________ Tagging mailing list [email protected] https://lists.openstreetmap.org/listinfo/tagging
