I'd like to thank everyone who replied. While there were some suggestions, it seems nobody else is worrying about these, so I guess with no established convention I'll go with waterway=drain;area=yes. waterway=drain because I've seen many of these sites with signs marked "drainage area". area=yes is required because the wiki page for drain:
http://wiki.openstreetmap.org/wiki/Tag:waterway%3Ddrain only lists way elements for it. John mentioned surface=grass. I've never seen one of these with grass. More like surface=ground/dirt/sand/gravel/compacted. -- Andrew Gregory <mailto:[email protected]> <http://www.scss.com.au/family/andrew/> _______________________________________________ Talk-au mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-au

