[OSM-dev] Polygons and Multipolygons

Artem Pavlenko artem.mapnik at googlemail.com
Fri Feb 8 12:06:20 GMT 2008


On 8 Feb 2008, at 11:50, Frederik Ramm wrote:

> Hi,
>
>> I found the way term 'Multipolygon' is used in OSM context is  
>> confusing.
>
> True. What we had been looking for was a term for "polygons with  
> holes"; it seemed unreasonable to create a relation "type=polygon"  
> as plain polygons, without holes, don't require relations. But  
> multipolygon is somewhat of a misnomer.
>
>> Shouldn't we be calling MultiPolygon  Polygon?
>
> There are only 2788 in the database so it would not be too hard to  
> change. I wanted to automatically add the "inner" and "outer" flags  
> to the existing polygons anyway, although they're not strictly  
> required they would make processing easier for some.

I think having 'outer' and 'inner' flags/tags will help at the data  
entry stage as well.
>
> Bye
> Frederik
>
> -- 
> Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00.09' E008° 
> 23.33'
>
Artem
>





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