[OSM-dev] Multipolygons as members of a multipolygon

Paul Norman penorman at mac.com
Mon Oct 8 18:11:57 BST 2012


The wiki page contains no examples of multipolygons with non-ways as members, either on http://wiki.openstreetmap.org/wiki/Multipolygon_Examples or http://wiki.openstreetmap.org/wiki/Relation:multipolygon. 

 

From: Igor Brejc [mailto:igor.brejc at gmail.com] 
Sent: Monday, October 08, 2012 1:06 AM
To: Paul Norman
Cc: dev at openstreetmap.org
Subject: Re: [OSM-dev] Multipolygons as members of a multipolygon

 


On Mon, Oct 8, 2012 at 9:12 AM, Paul Norman <penorman at mac.com> wrote:

 

Personally, I’d regard any multipolygons containing non-ways as being in error.

 

 

Unfortunately handing OSM data with too strict rules usually means a lot of it has to be disregarded. Just look at multipolygons Wiki page to see how many exceptions are allowed because people map things differently. So given that OSM Mapnik integration doesn't treat this as an error (it displays the names of both the "parent" multipolygon and of its "children"), I will ignore the relation member rather than rejecting the whole thing.

 

Igor

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