[Tagging] Masts vs Towers yet again

[Dave Swarthout]

I think you had better make the requirements for tower less strict. Most of
what I consider radio towers have no accommodation in them. It's the shape
and structure of the tower that makes the difference.

Here is the wiki page concerning towers:
http://wiki.openstreetmap.org/wiki/Tag:power%3Dtower

Take for example certain radio towers and the power towers shown above.
Both of these have wide bases with legs for support and are therefore free
standing. A mast, OTOH, is usually a single tube or lattice structure,
whose height is much greater than its width and whose base is often a
single point. These can be either guyed or free standing. Radio and power
towers are not usually guyed because their legs offer sufficient support.

IMO I don't think any changes in definition are needed.

Cheers,
Dave

On Fri, Apr 15, 2016 at 4:49 PM, Malcolm Herring <
malcolm.herring at btinternet.com> wrote:

> This is a continuation of a discussion started in the devel list. The
> issue is the definitions of "tower" and "mast".
>
> The two terms are used interchangeably in both UK & US english, resulting
> in a lack of consensus for tagging.
>
> Perhaps we should define a "for use in OSM tagging" definitions of these
> terms, simply to fix a convention. I will try a proposal:
>
> Tower: Any free-standing structure of high vertical aspect ratio that has
> some kind of accommodation within it (observation decks, restaurants,
> offices, apartments, etc)
>
> Mast: Any structure of high vertical aspect ratio that has no
> accommodation (apart from service access), commonly used for communications
> purposes & may or may not be free-standing.
>
>
>
>
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>



-- 
Dave Swarthout
Homer, Alaska
Chiang Mai, Thailand
Travel Blog at http://dswarthout.blogspot.com
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