[Xastir] Compression algorithm problem with DRGs

[Tom Russo]

On Sun, Mar 28, 2004 at 09:16:16PM -0800, a Mr. Richard Feyler of Fort Lee, New Jersey <jeepin95 at comcast.net> writes 'Dear Rosanne Rosannadanna':
> Thank you Derrick for the help, I haven't gotten it working but I think I'm
> headed in the right direction...
> 
> Geotifcp did not work, although it did get rid of that particular error,
> Xastir appears to load the file (given that no errors are displayed) but it
> is not displayed. I *think* that it has something to do with the geotiff
> data, but I'm new to this so I am not sure. I've looked at a few of the non
> working files and am limiting myself to working on 1 at this point, since
> they are all similar.
> 
> Listgeo on non working files gives me this...
> 
> $ listgeo o44123b3.tif
> Geotiff_Information:
>    Version: 1
>    Key_Revision: 1.0
>    Tagged_Information:
>       ModelTiepointTag (2,3):
>          0                0                0
>          557411           924395           0
>       ModelPixelScaleTag (1,3):
>          8                8                0
>       End_Of_Tags.
>    Keyed_Information:
>       End_Of_Keys.
>    End_Of_Geotiff.
> 
> 
> Corner Coordinates:
> Upper Left    ( 557411.000, 924395.000)
> Lower Left    ( 557411.000, 877739.000)
> Upper Right   ( 591723.000, 924395.000)
> Lower Right   ( 591723.000, 877739.000)
> Center        ( 574567.000, 901067.000)

Sigh.  Should have read the whole thread before responding.  This data is
missing *everything* needed to project the image into lat/long.  From the range
of data I see in the corner coordinates I am reasonably sure it's not UTM.

You'll need to get the metadata from the site where you downloaded the images,
construct a data file that geotifcp can grok, and then install the data into
the geotiff file if you have any hope of xastir reading it.  And then you might
still find it can't because it's an odd projection (likely) or datum (less
likely).

-- 
Tom Russo    KM5VY     SAR502  DM64ux         http://www.swcp.com/~russo/
Tijeras, NM  QRPL#1592 K2#398  SOC#236 AHTB#1 http://www.qsl.net/~km5vy/
 "It is inhumane in my opinion to force people who have a genuine
  medical need for coffee to wait in line behind people who apparently
  view it as some kind of recreational activity."  -- Dave Barry