[OSM-talk-ie] Where's the coastline?

Dave Foley davefoley at hotmail.com
Sat Jun 6 15:31:49 UTC 2015

I'm in two minds about it myself, I guess I would lean towards the Ordinance Survey map since you could argue there is some vegetation there. I personally would mark it inside the coastline and as wetland=tidalflat.


> Date: Sat, 6 Jun 2015 17:13:33 +0200
> From: moltonel at gmail.com
> To: talk-ie at openstreetmap.org
> Subject: Re: [OSM-talk-ie] Where's the coastline?
> On 06/06/2015, Killian Driscoll <killiandriscoll at gmail.com> wrote:
> > Hi, maybe I'm getting the wrong end of the stick, but why try and reinvent
> > the wheel when you can just compare how the land or water is already
> > interpreted
> It's more important to be self-consistent than to follow another
> project's lead, even a well-respected one. Or to phrase it
> differently, sticking with your decision is more important than what
> your actual decision is.
> That said, I think that the "coastline is at mean high-water spring
> tide" principle is the most common (sometimes using "high-water mark"
> instead, which is close enough).
> > look at the EPA map http://gis.epa.ie/Envision /
> > http://wiki.openstreetmap.org/wiki/Corine_Land_Cover and see what is land,
> > transitional waterbody, coastline.
> AFAIU Corine doesn't have a notion of "coastline" the way OS does. It
> just deals with landcover, and categorizes those as salt marsh, which
> is an easy decision in OSM too. The OSi map on that website shows the
> north part of the wetland as land and the south part as water, which
> is really bogus and a nice example of the official government-funded
> maps not always being the best :p
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