[Talk-GB] Coastline and tidal rivers

Mike Evans mikee at saxicola.co.uk
Wed Aug 29 10:15:32 UTC 2018

Hi David

On Wed, 29 Aug 2018 09:09:58 +0000
"David Groom" <reviews at pacific-rim.net> wrote:

> >>There is no consensus.
> >>
> >>Personally I'm not in favour of the view that any body of water which 
> >>is
> >>tidal should be bounded by a way tagged as coastline.
> >>
> >>Reasons for this
> >>
> >>1) Ask any one who lives in say central London "do you live on the
> >>coast" or do you live beside a river", most would I'm sure say beside 
> >>a
> >>river, so surely our data should reflect that. I think this probably 
> >>is
> >>what you mean by "seems more natural"  
> >Well if they're in Central London then it is an estuary at that point 
> >so they'd be incorrect. Hence the expression "estuary English", and not 
> >"river English".  
> Both the Oxford and Cambridge Dictionaries define as estuary as part of 
> a river.

Dictionaries are written for writers and are not necessarily useful as a mapping resource.
There's more here: https://en.wikipedia.org/wiki/Thames_Estuary

> >
> >Perhaps "A History of the Foreshore and the Law Relating Thereto", 
> >published 1888 would be a useful reference.
> >https://archive.org/details/ahistoryforesho00hallgoog
> >
> >  
> >>
> >>2) In part because the converse is not true, we bound large non tidal
> >>water areas as coastline  
> >Examples?
> >  
> Baltic , Caspian & Black Seas
All are tidal to small extent, see:

But none of this helps us draw an arbitrary line across a river/estuary/tidal/non-tidal water body.

Regards Mike 

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