David,

David Carmean wrote:
> Thanks for the clarification.  Indeed the linestrings are the primary 
> desired feature in my use cases (as will be polygons constructed from 
> the closed ways).  

It is easy to make polygons from closed ways, but quite hard to make 
polygons from multipolygon relations (at least it's not something that 
you can do well with a simple st_buildarea).

Depending on what exactly you want, you may want to look into the file 
we're offering (weekly update) at http://download.geofabrik.de/polygon/, 
it is a PostGIS dump with multipolygon geometries for every single 
closed way *and* multipolygon relation in OSM.

Bye
Frederik

-- 
Frederik Ramm  ##  eMail [email protected]  ##  N49°00'09" E008°23'33"

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