Hi Lionel Thanks for this helpful clarification! I'd suggest to use them on OSM.
Regards Markus On Fri, 26 Oct 2018 at 11:30, Lionel Giard <lionel.gi...@gmail.com> wrote: > > At my work (a telecom company in Belgium), i see these types of mobile > structure construction : > - Self-supported pylons (the "tower", mostly looking like the power=tower in > OSM, but also including the (older) self-supported tower in concrete) ; > - Guy-wired pylons (the "mast" as described in the engineering definition > where it is a structure held by guys); > - Self-supported roof structure (half of them are just simple antennas, the > other half are mast (the larger structure that clearly hold more than 1 > antenna on top of buildings)); > - Guy-wired roof structure (all of them are mast); > - And some other things like on electricity pylons....(all of them are just > antennas on top of something as far as i know). > > And as a sub-type (indicating type of construction) : we got the "lattice > pylon", "tubular pylon", "lattice mast", "tubular mast" or just "tubes" (for > antennas isolated). So it would correspond to the > tower:construction=guyed_lattice or guyed_tube (for mast) and lattice or > freestanding (for the tower). Note that the older concrete telecom tower is > noted as "tubular pylon". > > Thus, as i see it, the tower tag is the equivalent of pylon (as in the > power=* tag where the power=tower is the equivalent of what we call > "electricity pylon" here) and the mast are either the guy-wired structures OR > the "largest" structures on the roof of buildings (which are clearly not an > unique antenna). And then we need a tag for isolated antenna (i saw that a > "telecom=antenna" was proposed on the telecom wiki page and i used it some > times, but that's just a tag to indicate either on a node (on top of a > building) or on another structure (like power=tower) that a telecom antenna > is there. So to me, this covers everything i see in our database. > > If we use the current definition, the only problem i see is for the > "self-supported pylons" which should all be tagged as tower (on engineering > terminology), but could currently be tagged as mast if they don't look like > "big tower". But the problem is minor, as if you look at the tag > "tower:construction", the "guyed_lattice" and "guyed_tube" already say that > it is a 'mast' in the engineering definition (and as far as i know, all masts > are either guyed_lattice or guyed_tube construction !). ;-) > > => And thus, the only change i would make is to the sub-tag > tower:construction : using "lattice" or "tube" for the "freestanding" towers > (the freestanding value is more general but give not much information as if > it is not guyed, i think it is always freestanding). So at the end, the > engineering definition is clearly indicated via this tag. > > Best regards, > Lionel > > Le ven. 26 oct. 2018 à 09:07, Martin Koppenhoefer <dieterdre...@gmail.com> a > écrit : >> >> >> >> sent from a phone >> >> On 26. Oct 2018, at 01:57, Greg Troxel <g...@lexort.com> wrote: >> >> for all things which are not buildings and basically exist to support >> antennas, and avoid the tower/mast word choice, which is pretty clearly >> contentious and/or confusing. >> >> >> >> what about this: >> https://upload.wikimedia.org/wikipedia/commons/1/11/Killesberg_Tower.jpg >> >> Actual tagging is even more weird, or does anyone recognize a mansard roof >> here? >> https://www.openstreetmap.org/way/306362151 >> >> this is not a building, neither by the German nor by the English definition, >> but at least for Germans it is a tower. >> I would not require for towers to be a building (which at a minimum should >> provide some enclosed space). >> >> >> Cheers, Martin >> >> >> _______________________________________________ >> Tagging mailing list >> Tagging@openstreetmap.org >> https://lists.openstreetmap.org/listinfo/tagging > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
