[Geotiff] Linear Units of Projections Parameters

Ned Horning nedh at lightlink.com
Mon Feb 27 16:06:55 EST 2006


Frank,

>From what I can tell ENVI seems to be dealing with these tags properly - at
least when I use ENVI to write the tags in the first place before saving as
GeoTIFF. I didn't have a "feet" image to test but when I converted a
"meters" image to "feet" then saved it as GeoTIFF the easting and northing
info was correct when I read it in ENVI. 

For what it's worth, I think it would be best to not make the assumption
that false easting and northing are always in meters. 

Ned 

Frank Warmerdam wrote:
> It would be helpful to know specifically if ENVI or Geomatica handle
> the false easting and northing properly.  I wrote the original
> Geomatica GeoTIFF handling, but can't recall the details.  I suspect
> I assumed it was in meters since that is what the internal GCTP
> code at PCI looks for.   Actually, I should be able to check this with
> the PCI free viewer.  Is there still an ENVI free viewer?




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