[OSM-dev] courtyards

mayeul.kauffmann at free.fr mayeul.kauffmann at free.fr
Thu May 19 09:32:21 BST 2011

I developed my own sql processing to render courtyards, strange multipolygons, etc.
Have a look here:
In my view computer code (e.g. sql script) is the only precise tool to define what is "a valid polygon with a hole"

Hope this helps,

----- Mail Original -----
De: "Bernhard Zwischenbrugger" <bz at datenkueche.com>
À: "M∡rtin Koppenhoefer" <dieterdreist at gmail.com>
Cc: "dev at openstreetmap.org >> dev" <dev at openstreetmap.org>
Envoyé: Jeudi 19 Mai 2011 00h09:28 GMT +01:00 Amsterdam / Berlin / Berne / Rome / Stockholm / Vienne
Objet: Re: [OSM-dev] courtyards

On 2011-05-09 11:31, M∡rtin Koppenhoefer wrote:
> 2011/5/9 Bernhard Zwischenbrugger<bz at datenkueche.com>:
>>> Any links to examples failing to render for you?
>> here for example:
>> http://www.openstreetmap.org/?lat=48.20651&lon=16.35885&zoom=16&layers=M
>> <http://www.openstreetmap.org/?lat=48.20651&lon=16.35885&zoom=16&layers=M>
>> All the big buildings should have "holes".
> IMHO there is "wrong" mapping, as the building-tag is set to the outer
> way instead to the relation. This should work nonetheless (because of
> tolerant rendering, at least it worked for some time in the past), but
> is less "clean"/"unambigous". Try putting the building tag into the
> relation and remove it from the outer way.
> The example I looked at was this:
> http://www.openstreetmap.org/browse/relation/11132
Sorry, I don't understand this.

This building ist rendered correctly:

and this
is not rendered with courtyard.

Where is the difference.


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