[Proj] Problem overlaying georeferenced images in Google,
jorge.arevalo at gmail.com
Thu May 29 12:18:27 EDT 2008
Mmm... just now I was reading about datum convert and +towgs84. But the GMaps datum is somehow different from WGS84, is'n it? Can I use +towgs84 instead of this?
> > gdalwarp
> > -s_srs "+proj=utm +zone=31 +ellps=intl +units=m +no_defs"
> > -t_srs "+proj=merc +lat_ts=0.0 +lon_0=0.0 +k=1.0 +x_0=0.0 +y_0=0.0
> > +a=6378137.0 +b=6378137.0 +units=m +nadgrids=@null +no_defs"
> > -co INTERLEAVE=PIXEL
> > <raster file name> <reprojected raster file name>
> > Then, I did the reprojection, but I still have the problem... better
> > look, but still remains... Bad overlaid images
> > I think that the proj.4 parameters are correct. ...
> It looks like you are missing the datum transformation parameters to convert from ED50 to WGS84. You need to add the +towgs84
> parameter to your source projection. However, I can't help you with suggested values for that parameter for your source
> coordinate system. You'll have to do some research.
> -- > > Eric G. Miller > Staff Programmer > CA Dept. of Fish & Game
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