On Thu, 25 Oct 2018 at 09:41, Joseph Eisenberg <joseph.eisenb...@gmail.com> wrote:
> 1. Multipurpose tower still seems a little ambiguous to me. Observation > tower is closer for most of them, because they are big enough to have > elevators and public observation decks, right? > Multipurpose certainly isn't ideal, but was the best thing I could come up with! :-) Most of them do indeed have observation decks, restaurants & so on, but they're usually also festooned with antennae. > Since there are already tags for tower:type=observation and > tower:type=communications, perhaps there is no need for > man_made=communications_tower? > Quite possibly, especially as it's horribly misused, but, as someone said earlier in the discussion, they do render differently to other towers, show up on the map fairly early, & make fantastic landmarks. 2. In rendering style sheets it is possible to set the zoom level, the size > of the icon and the presence of the name label based on height. For example: > height>100 renders at z13, > height>50 at z14, > height>30 at z15, > And if there is no height, at z17. > > So entering a numeric height value in meters provides the most data for > database users, and the most flexibility for map renderers. > That's great, thanks. > It can be challenging to measure the height of a 100m tall tower, but an > individual can use a meter stick, a gps and trigonometry to check the > height in person. Often the height is on a sign for big towers. Armchair > mappers may be out of luck, unless the sun casts long shadows on the aerial > imagery, but there are many things that cannot be mapped from one’s > armchair. > Indeed it can be. A lot of the big ones will be listed somewhere on the internet - the really big ones have their heights listed on that wiki page I mentioned earlier, & I don't suppose it *really* matters if someone lists a tower as being 100m when it's really only 80! Thanks Graeme
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