graham at theseamans.net
Wed Feb 21 15:33:21 GMT 2007
Andy Armstrong wrote:
> 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 :)
It seems to be known cryptically as 'Fo' in equations...
The source comments just say 'scale factor on the meridian'
> As an alternative you could try converting the OSGB36 lat/lon to WGS84
> 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.
Brilliant, I hadn't even realised it accepted them - and my
northings/eastings are perfect, so now I know for sure it's a conversion
problem :-) Thank you very much indeed...
> --Andy Armstrong, hexten.net
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