[Talk-GB] Coastline Tidal Positions

Dave F. davefox at madasafish.com
Thu Sep 16 15:56:51 BST 2010

  On 16/09/2010 15:23, Craig Loftus wrote:
>> Which is more accurate: the OS Streetview data that shows MHW (spring, I assume) or the PGS data?
> I haven't used it for coast lines, but doesn't OS Vector District
> include the high water mark? This would be the most 'accurate',
> although not necessarily the most 'correct' source? Certainly better
> than tracing from Streetview.

In the case of coastline, aren't they the same data, just in different 

As I've haven't attempted importing yet (I don't think using the whole 
coastline would be a good first try); I just wanted to trace the area 
that I surveyed recently & make sure that it's more accurate than what's 
already there (PGS).

Dave F.

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