[Talk-GB] Coastline Tidal Positions

Chris Hill osm at raggedred.net
Thu Sep 16 16:15:03 BST 2010

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.
> http://wiki.openstreetmap.org/wiki/Using_OS_Shapefiles
The OS data seems much better than the PGS data.
The OS vector data does seem to be older than the OS StreetView data, in 
places that I have compared so in places where there is a lot of change, 
such as rapid coastal erosion, tracing StreetView seems better.

Cheers, Chris
user: chillly

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