Talk:Tag:natural=water

Is it possible to split a lake between several ways? This is useful if different parts have been surveyed in different ways (e.g. aerial photography for most of the shore, but GPS tracks near a town). /januari 1st 2009 user:Bruce mcadam

Not that I know, but you can see the source code for osm2pgsql and Osmarender if you want to know. Erik Johansson 13:00, 22 March 2009 (UTC)

Use a multipolygon relation with multiple 'outer' components.--Hai-Etlik 02:21, 24 January 2010 (UTC)

Throwing away good data and confusing the data model

"Redundant tags should be removed from the Way" : this is bad advice. If you do that it makes certain operations much more difficult later on. Also it is mixed abstraction: tag relations with relationship meta-objects (way IDs in database-world); tag physical attributes to geospatial objects (earth coords in a way). --Hamish 15:33, 30 April 2010 (UTC)

A multipolygon doesn't model a relationship, is is simply an improvised area element - and tags that apply to the area represented by a multipolygon should go to the relation by definition. Removing redundant tags from multipolygon members is good practice, and strictly speaking not doing so even leads to wrong results. (The outer way explicitly can represent a feature in its own right, so it would be correct, albeit not advised for a robust renderer, to view it as a second lake without a hole overlapping the multipolygon lake). I will remove the remark if there are no objections. --Tordanik 18:14, 8 December 2012 (UTC)

Water were bathing/swimming is forbidden

See Talk:Bathing#Water were bathing/swimming is forbidden --Olejorgenb 23:14, 11 July 2011 (BST)