[Tagging] Tracks for moveable large objects

Allan Mustard allan at mustard.net
Fri Nov 23 16:33:42 UTC 2018

If it is moveable it is a gantry crane.  A gantry per se can be
immobile, right?

That aside, rails are rails.  Maybe not a rail line in the conventional
sense, but I tagged an (unfortunately disused) children's train in
Ashgabat https://www.openstreetmap.org/way/429019713 as a railway even
though it goes around and around, or used to, and has no destination.

light_rail 	unused
name <https://wiki.openstreetmap.org/wiki/Key:name?uselang=en-US>
name:en <https://wiki.openstreetmap.org/wiki/Key:name:en?uselang=en-US>
Children's Toy Train
name:ru <https://wiki.openstreetmap.org/wiki/Key:name:ru?uselang=en-US>
Детская железная дорога
railway <https://wiki.openstreetmap.org/wiki/Key:railway?uselang=en-US>
usage <https://wiki.openstreetmap.org/wiki/Key:usage?uselang=en-US>

On 11/23/2018 2:28 PM, Michael Patrick wrote:
>     Some radio telescopes are located on what could be called rail
>     lines. ...
>     though these lines have to carry more localised weight and have a
>     much
>     larger track width. For a photo see
>     http://www.atnf.csiro.au/resources/imagebank/images/ATCA_in_a_line.jpg
>     Ideas for suitable tags for these 'rail lines'?
> 'Rails' certainly, but not 'rail lines' in the conventional sense., in
> that a rail line implies an origin and destination ( in the 'railroad'
> sense ), in this case all are parts of a single device, albeit a very
> large one.
> A movable support structure primarily constrained in the horizontal
> plane is known as a *gantry* (system). The constrained path might be
> pavement, rails, sprockets and the movement contact point might be
> wheels, slides, skates, airbags, tracks, pivot, or some such. The path
> might be straight as for cranes or circular in the case of irrigation
> systems, and other geometries that might include switches. They range
> in size from tabletops
> <http://go.aerotech.com/gantry?creative=313509089976> to almost a
> kilometer
> <https://www.researchgate.net/profile/Marco_Zimmerling/publication/316674860/figure/fig3/AS:490393876865026@1493930419717/The-open-pit-mine-where-the-wireless-network-was-installed.png>
> in some mining and agriculture operations
> <https://centrelineirrigation.com.au/image/data/centereline-irrigation-service.jpg>.
> Their purpose and action differ from railway / rail line (etc.)  -
> i.e. primarily positioning
> <https://en.wikipedia.org/wiki/Gantry#Devices_and_structures> vs.
> transport.
> Michael Patrick
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