The lower left corner coordinates of the SD square are:
300 000 metres East
400 000 metres North
So your test coordinate is at (Easting Northing): 380150 402109
echo "380150 402109" | gdaltransform -s_srs EPSG:27700 -t_srs EPSG:4326
-2.30083027968938 53.5152719980087 48.8662291513756
Please note that behind the scenes, these datum shift parameters are
applied: +towgs84=375,-111,431,0,0,0,0 (which might be what you want ..
or not).
Hermann
On 2013-01-08 21:17, Johnny wrote:
Hi,
I am trying to convert OSGB grid references to WGS84, but do not succeed
and don't understand why?
I use
: echo "SD8015002109 "|gdaltransform -s_srs EPSG:27700 -t_srs EPSG:4326
which gives
: -7.55729138544866 49.7667307394399 50.4807807941111
If I use [1], the result is
: 53.515279 -2.300819
which can be verified as correct on maps.
What error am I making in assuming this should work?
I use
GDAL 1.9.1, released 2012/05/15
Fedora 17
Thanks!
Footnotes:
[1] http://www.nearby.org.uk/coord.cgi?p=SD8015002109&f=conv
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