Re: [OSM-newbies] How to tag when building present

2014-12-20 Thread Andre Engels
On Sat, Dec 20, 2014 at 7:31 AM, Gavin Scott gavincsc...@gmail.com wrote:
 In my area all the buildings have been drawn.

 How do I tag the facilities located in those buildings?

 Here are the options

 Create a point inside the polygon and tag that with the attributes of the
 fasciities/functions that operate within the building, say Hopsital, or
 Shop.
 Tag one of the nodes that form the building polygon with the services
 performed within. Perhaps one of the the entrance nodes.
 Tag the polygon line. (I think this is impossible as the line has already
 been tagged with the value building.

This is perfectly possible. You cannot tag _the same key_ twice, but
you can have different ones. building=yes + shop=bakery is
perfectly valid.

 I should point out that all of these building polygons has been tagged with
 key=building

If you mean by this what is usually meant by it, we have a major
retagging to do. The way to tag a building is not key=building, but
building=yes

To get back at your question: I would be against the second solution
(using one of the nodes of the polygon. The polygon, if everything is
correct, should denote the outer walls of the building. Only things
that are actually on that outer wall should get mapped on nodes of
that polygon. A shop would be extending into the building, so putting
it on the outer wall would be incorrect.

Putting it on the polygon would be correct if the shop and the
building are indeed 'the same thing'. That is, there is not something
else in another part of the building. Putting it on a node would
always be correct (unless it is already put correctly on the polygon).
My preference is not to put it at the entrance, but at the
(approximate) center of the actual shopping area.

 Another question. If one of these buildings conducts more than one function,
 say a bottleshop that also operates as a supermarket. these tags must appear
 on different nodes? One node one value I believe is the principal.

It depends on what you mean by 'also operates as'. If it is really
more like two shops in the same building, then put two nodes in. If it
is one shop with a somewhat odd combination of articles for sale,
choose one as the main one (a supermarket that has an extraordinarily
large bread section is still a supermarket, a place where bread is
baked and sold that also has a few shelves of other foodstuff is still
a bakery). If you really cannot choose, use the semicolon as described
in another answer, or consider it two separate shops and use two
nodes.


-- 
André Engels, andreeng...@gmail.com

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Re: [OSM-newbies] How to tag when building present

2014-12-19 Thread Clifford Snow
On Fri, Dec 19, 2014 at 10:31 PM, Gavin Scott gavincsc...@gmail.com wrote:

 In my area all the buildings have been drawn.

 How do I tag the facilities located in those buildings?

 Here are the options

1. Create a point inside the polygon and tag that with the attributes
of the fasciities/functions that operate within the building, say Hopsital,
or Shop.
2. Tag one of the nodes that form the building polygon with the
services performed within. Perhaps one of the the entrance nodes.
3. Tag the polygon line. (I think this is impossible as the line has
already been tagged with the value building.

 I should point out that all of these building polygons has been tagged
 with key=building


Just remember, you can always change the tag if it wrong or could be better
described with a different feature.

I would recommend nodes tagged with individual features. For example, a
nearby grocery store also has a coffee shop, run separately from the
grocery, and a bank branch inside.  One option would be to tag the building
with the grocery store with two separate nodes, one for the coffee shop and
one for the bank. Additional tags could be added for ATMs, restrooms, etc.
Another option is to leave the building as building=yes with separate tags
for all the attributes.

My preference is based on the purpose of the building. If it a multiuse
building, leave the building as just a polygon tagged building=yes. If the
building was built for a specific amenity, such as grocery store or
hospital, then tag it building=yes with other appropriate tags.


 Another question. If one of these buildings conducts more than one
 function, say a bottleshop that also operates as a supermarket. these tags
 must appear on different nodes? One node one value I believe is the
 principal.


You can use semicolon separated values, for example
shop=supermarket;alcohol. I tend to pick the one or the other, depending on
what you think is it major feature. But either way is probably correct.

Good luck,
Clifford




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