[Tagging] Should greenhouse et al have building=yes? (was building=digester)

[johnw]

> On May 21, 2016, at 6:43 PM, Martin Simon <grenzdebil at gmail.com> wrote:
> 
> Some are tent-like, some have a rigid steel structure that supports itself.


This is an interesting question. In my area, there are thousands of greenhouses, or as they are called in Japanese “Vinyl Houses” (Vinyl meaning any thin Plastic).

They are tent-like and have a steel supporting structure that fits together like tent poles. hundreds of tent poles. They are basically giant umbrellas.

https://goo.gl/maps/cZnHEEKHsup

The greenhouses are built out of a rigid tubular frame - many of them out of ~20mm tubing with some .1 or .2 plastic stretched over it, and some plastic strapping placed over it all to hold the plastic sheets onto the frame - similar to the straps found wrapped around heavy packages in a store.  

Some are taller because they use 6CM square metal poles on  buried precast concrete anchors to lift up the center section.
https://www.flickr.com/photos/javbw/12422831963/in/album-72157640754351584/ <https://www.flickr.com/photos/javbw/12422831963/in/album-72157640754351584/>
This one (on the right) is next to my house. it collapsed 3 hours later under heavy snow. 

many are left in place for decades, but the plastic and poles are periodically changed as they are damaged by wind and snow and typhoons. 

farmers can set them up in a day and pull off the plastic for the winter. They never seem “permanent” like a house or even a shed. but they often get left in the same spot for a really really long time.

People put blue or black tarps over them instead of clear plastic. are they then garages? are those buildings?
https://www.flickr.com/photos/javbw/6752512409/in/album-72157638113676925/ <https://www.flickr.com/photos/javbw/6752512409/in/album-72157638113676925/>
https://goo.gl/maps/cy2ASrQLP2t <https://goo.gl/maps/cy2ASrQLP2t> (all destroyed by snow in 2014) 


if the plastic gets taken off in the winter, does it become a trellis? is that a building?
https://www.flickr.com/photos/javbw/3877443370/in/album-72157638113676925/ <https://www.flickr.com/photos/javbw/3877443370/in/album-72157638113676925/>

if they are over a vinyard - is the vinyard in a “building”? They put the plastic over the frames in summer to keep the birds and rain off the grapes. 

https://goo.gl/maps/T2z7GCs1ecq <https://goo.gl/maps/T2z7GCs1ecq> 
https://goo.gl/maps/gCLPy9Taye72 <https://goo.gl/maps/gCLPy9Taye72> 

These are in an orchard. They are growing shiitake mushrooms with black plastic draped over it. 
https://goo.gl/maps/AHdSWF6Zw1U2 <https://goo.gl/maps/AHdSWF6Zw1U2>



But this is in contrast to the few actual “greenhouses” - permanent buildings with walls and glass /thick plastic panes for windows. is that a glasshouse or a greenhouse?

https://goo.gl/maps/WbPGHqeVZvL2 <https://goo.gl/maps/WbPGHqeVZvL2> here is a permanent greenhouse with permanent sides. this is a building. 

I would map permanent “glasshosues” as buildings, but these plastic umbrella tents over some strawberries or tomatoes or a tractor? Are they really Buildings?  I wish they got their own render with a different color than “building”, perhaps a much lighter shade. even a shed is more permanent.  

the issue I run into is that there are “well built” tent ones as well. 
https://goo.gl/maps/24gkLALTnwT2 <https://goo.gl/maps/24gkLALTnwT2>

https://goo.gl/maps/VHX2ZzhTnPK2 <https://goo.gl/maps/VHX2ZzhTnPK2>

All were destroyed in 2014 by 30CM of snow. 

Where to daw the line seems fuzzy - but if your main building material is the same plastic they make disposable umbrellas out of, it doesn’t feel like a building. 

Javbw


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