[Tagging] high mobile masts on man_made=mast

Clifford Snow clifford at snowandsnow.us
Sun Feb 15 20:25:13 UTC 2015


On Sun, Feb 15, 2015 at 11:56 AM, Mihkel Rämmel <rm87 at hot.ee> wrote:

> Does anyone have objections to adding a second picture of mobile mast
> to man_made=mast on wiki and clarifying that masts can be higher than
> 'only a few meters'.
>
> http://wiki.openstreetmap.org/wiki/File:Mobile_communications_mast.JPG
>

The wiki mast vs tower definition appears wrong to me and wikipedia. I've
been taught that a mast is usually not self supporting, ie. has guy wires
while a tower is self supporting.  Wikipedia [1] states " However, in
structural engineering terms, a tower is a self-supporting or cantilevered
<http://en.wikipedia.org/wiki/Cantilever> structure, while a mast
<http://en.wikipedia.org/wiki/Guyed_mast> is held up by stays or guys
<http://en.wikipedia.org/wiki/Guy-wire>."  While the OSM wiki states "A man
made mast is a small tower of only a few meters. It is often built from
concrete or steel and only for a single application like a mobile phone
base station. A tower is accessible and provides platforms, whereas a mast
only offers ladder steps to climb it."

I think the wiki need changing, along with your new image, which is clearly
a mast.

Clifford

[1] http://en.wikipedia.org/wiki/Radio_masts_and_towers
[2] http://wiki.openstreetmap.org/wiki/Tag:man_made%3Dmast


-- 
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OpenStreetMap: Maps with a human touch
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