[Proj] Google Mercator Projection
zagot
maurelio at live.it
Thu Aug 4 02:23:15 EST 2011
Hi to All,
this is an oldie, but i cannot seem to find a solution.
When i want to do a transform on a wgs84 to google/bing the y coordinate
shifts.
I have read this variuos post and this official note:
http://trac.osgeo.org/proj/wiki/FAQ#ChangingEllipsoidWhycantIconvertfromWGS84toGoogleEarthVirtualGlobeMercator
...so I tried adding +nadgrids=@null like i read, but with this example:
from ..."+proj=latlong +datum=WGS84";
to... "+proj=merc +a=6378137 +b=6378137 +lat_t1=0.0 +lon_0=0.0 +x_0=0.0
+y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs"
i have this result -626172.1357121646, 6887893.4928337997
in the result y differ from correct value:6853955.508199729 (with Proj.NET
the result is correct)
..seems adding +nadgrids=@null have no effect
what's I wrong?
thanks in advance
sorry for my english
thanks
--
View this message in context: http://osgeo-org.1803224.n2.nabble.com/Google-Mercator-Projection-tp6651663p6651663.html
Sent from the PROJ.4 mailing list archive at Nabble.com.
More information about the Proj
mailing list