geographical accuracy
Andy Armstrong
andy at hexten.net
Wed Feb 21 15:03:17 GMT 2007
On 21 Feb 2007, at 14:43, Graham Seaman wrote:
> This improves the output but by a tiny amount (typically a change
> in the 4th decimal place of the lat/long) which is smaller than the
> error. Do you know what the correct scalefactor for wgs84 is?
> I've tried googling with no results so far...
I'm not sure what that's doing so I don't know :)
As an alternative you could try converting the OSGB36 lat/lon to
WGS84 using
http://search.cpan.org/~grahamc/Geo-Coordinates-UTM-0.05/UTM.pm
That'd at least allow you to confirm that that's the problem.
Another check: take your easting, northing and paste them into http://
streetmap.co.uk/ to see if they have the same error there.
--
Andy Armstrong, hexten.net
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