Hi, This is potentially life or death information, so I'm not sure if it is approved for OSM.
Different datums (measurements) are used: http://en.wikipedia.org/wiki/Chart_datum However, with lakes, you might find novel effects on water depth, like flows from higher rivers / lakes, reservoirs, currents, etc. Colm --------------------------------------------------------------------------------------------------------------- Never doubt that a small group of thoughtful, committed citizens can change the world. Indeed, it is the only thing that ever has. Margaret Mead > Message: 2 > Date: Fri, 29 May 2015 15:10:51 +0100 > From: Daniel Cussen <[email protected]> > To: Discussion of OpenStreetMap in Ireland <[email protected]> > Subject: Re: [OSM-talk-ie] Water depth in lake > > 3) Depth is normally displayed on maps as mean tide level (I think), > are you taking into account tide (off shore) or recent rain for rivers > to calculate the actual depth below mean level? > _______________________________________________ Talk-ie mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk-ie
