On 16/04/2016 10:39 PM, Martin Koppenhoefer wrote:
sent from a phone
Il giorno 16 apr 2016, alle ore 10:11, Dave Swarthout <daveswarth...@gmail.com>
ha scritto:
But the second is more difficult. It exhibits the main characteristics of a
mast but it has some sort of accommodation near the top, which might persuade
me to tag it as a tower. Very tricky to tag.
to me that is clearly a tower, btw. the first of its kind, from 1956, and
copied multiple times (e.g. by the Berlin tv tower). I d call the concrete part
a shaft rather than a mast, but even mast might not be completely wrong, just
that with the cafe on top it clearly becomes a tower.
Then,as if to add insult to injury, Marc and you add an example where what
might be tagged as either mast or tower clearly has another mast on top of it.
yes, that's quite typical, having a mast on top of a tower (or tower building),
also because it's a cheap method to get your tower a bigger height in ranking
lists ;-)
layer=o, tower
layer=1, mast.
Some 'masts' have attached external hand/foot holds to aid climbing for service
personnel,
so I would think that the 'mast' definition detail should exclude access on
the inside of the structure to help distinguish it from a 'tower'.
cheers
Martin
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