> -----Original Message-----
> From: grant [SMTP:[EMAIL PROTECTED]]
> Sent: Thursday, 2, December 1999 8:43 AM
> To: [EMAIL PROTECTED]
> Subject: Re: FW: Geotiff problems in MI 5.5
>
> > Below was posted to the MapInfo-List, could anyone shed any light on it?
> > Chris Brown - Cartographer
> > Resource Development Division, Hamersley Iron P/L
> > mailto:[EMAIL PROTECTED]
> >
> > > -----Original Message-----
> > > From: Michael Goldberg [SMTP:[EMAIL PROTECTED]]
> > > Sent: Wednesday, 1, December 1999 11:35 PM
> > > To: '[EMAIL PROTECTED]'
> > > Subject: Geotiff problems in MI 5.5
> > >
> > > Dear List,
> > >
> > > I have several geotiff images created in ER Mapper that I can not open
> in
> > > MI 5.5. I've tried the Georeg tool and it says "the specified file
> does
> > > not contain valid registration information." It opens up perfectly in
> > > ArcView. Does anyone have any suggestions as to what the problem is?
> > >
> > > Thanks,
> > >
> > > Michael Goldberg
> > > City of San Antonio Planning Department
> > > Data Management & CAD
> > > [EMAIL PROTECTED]
> > > (210) 207-6533
> > >
>
> Yes, the problem ( in general ) is geotiff. Geotiff is a set of
> georeference
> tags added to the tagged image file format && the complete set of tags
> forms one of those RS-232 serial 'standards' that were always interesting
> for the shear number of different 'standard' standards.
>
> A proprietry scanner that I worked with recently produced TIF files with
> a few 'extra' tags embedded that caused some other standard software to
> baulk becuase of 'unrecognised format' problems.
>
> I would suspect that ermapper creates fairly 'vanilla' TIF files ( ie uses
> the
> minimal tag subset in the most universal way ) & the fact that ArcView
> reads them suggests that this is either true or that the ermapper geotiff
> programmers worked to getting ArcView to read them as a benchmark.
>
> Other possibilities are that the co-ord values ( say easting / northings )
> fall outside a 'valid range' ( eg cross over into next zone, or are lat /
> lons
> that cross the 180degree mark etc ) that are being arbitrarily rejected.
>
> My specific problems that I've had to solve with geotiff's I've solved by
> writing a tag extracter / rewriter as a utility. However this approach has
> been taken on a case by case basis & so I have no 'generic' one program
> fixes all solution.
>
>
> I would suggest posting an example file in question to either MapInfo or
> ermapper or some programmer with both products or hunting for the
> existence of a robust geotiff tag editor that is user friendly. Failing
> that,
> get back to me.
>
> cheers
> Grant Murphy
> [EMAIL PROTECTED]
>
>
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