<div dir="ltr">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.<div><br></div><div>Here is the wiki page concerning towers: <a href="http://wiki.openstreetmap.org/wiki/Tag:power%3Dtower">http://wiki.openstreetmap.org/wiki/Tag:power%3Dtower</a><br><div><br></div><div>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. </div></div><div><br></div><div>IMO I don't think any changes in definition are needed.</div><div><br></div><div>Cheers,</div><div>Dave</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Apr 15, 2016 at 4:49 PM, Malcolm Herring <span dir="ltr"><<a href="mailto:malcolm.herring@btinternet.com" target="_blank">malcolm.herring@btinternet.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">This is a continuation of a discussion started in the devel list. The issue is the definitions of "tower" and "mast".<br>
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The two terms are used interchangeably in both UK & US english, resulting in a lack of consensus for tagging.<br>
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Perhaps we should define a "for use in OSM tagging" definitions of these terms, simply to fix a convention. I will try a proposal:<br>
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Tower: Any free-standing structure of high vertical aspect ratio that has some kind of accommodation within it (observation decks, restaurants, offices, apartments, etc)<br>
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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.<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr">Dave Swarthout<br>Homer, Alaska<br>Chiang Mai, Thailand<br>Travel Blog at <a href="http://dswarthout.blogspot.com" target="_blank">http://dswarthout.blogspot.com</a></div></div>
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