Talk:Data Primitives

From OpenStreetMap

Areas

• CAVEAT: How can you distinguish between an area and a roundabout? -- KristianThy 23:17, 12 December 2006 (UTC)

You flag areas with a suitable key, like landuse:residential, whereas with roundabouts, you label them as highways -- Johndrinkwater 23:16, 13 December 2006 (UTC)

Maybe we should change the "Closed way" section to reflect that? Whether a way is closed does not say at all whether it's an area or not. Take coastlines for example. They're describing an area (it's up to you whether it's the land or the sea), but the coastline ways are not closed -- they'd be too big if they were closed. And AFAIK someone is already working on removing that restriction for other polygon types too. --GabrielEbner 18:03, 24 May 2007 (BST)

model clarifications

Please specify some restrictions on the model to help developers:

• may a segment has the same node both from start and end node?
• as tags are deprecated and a segments is only a connection between two nodes, if a segment A (node1,node2) exists, can we add a segment B (node1, node2) or it should be rejected?
• again, if a segment A (node1,node2) exists, should we consider the segment B (node2, node1) a duplicate of A?

Examples of relations in the data?

Can I find examples of relations in use anywhere in XML notation? Thanks. -- Mark 08:07, 8 July 2008 (UTC)