I didn't think the tiff image standard hand point of origin
specification. 


Cory C Weber
Visual Spatial Technician
Environmental Science Division
Argonne National Laboratory
9700 South Cass Avenue 
Argonne, IL 60439
[EMAIL PROTECTED]
630-252-7498


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Norman Vine
Sent: Tuesday, January 16, 2007 4:45 PM
To: 'osg users'
Subject: RE: [osg-users] OSG DEM Question

Jason Beverage writes:
>
> I've looked through the code and I can't see anything glaringly 
> obvious as to why files with embedded geospatial coordinates work fine

> but it inverts terrain when specifying the geotransform on the command

> line.

The reason is latitude is positive up negative down The opposite of an
image that has line 0 at top

Eg an image Y increases in the down direction

Hth

Norman

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