[Tagging] mast / tower / communication_tower (again)
graemefitz1 at gmail.com
Thu Oct 25 05:44:28 UTC 2018
On Thu, 25 Oct 2018 at 09:41, Joseph Eisenberg <joseph.eisenberg at gmail.com>
> 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
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
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!
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