shifting DLG data

[Phil Chaney]

> 
> 	I have a Digital Ortho Photo that we have checked with a 
> differential GPS series of test points.  WE believe it is correct.
> When I overlay DLG data over this, I find that the DLG data is off
> by about 175 meters to the northwest.  Is there anyone out there 
> who knows of a way to shift the DLG data so that it fits the DOQ.
> 
> Thanx
> 
I would recommend checking the datum of your photo data and the DLG to
make sure they are compatible. The DLG is probably NAD27, and your photo
could be NAD83. Whatever the problem is, there are commercial software
programs available (and consultants) that could make the transformations.
Another option is to use NGS Corpscon software or some other program, but
you may need to make a lot of format changes to use NGS software.

........................................................................
Phillip L. Chaney                                  Center for Advanced
Research Specialist                *    *          Spatial Technologies
                               *            *         /\    /\    /\    
CAST/NCRI-SW                                       --------/--\--------   
University of Arkansas              ____            /    \/    \/    \  
Phone: (501) 575-4575                /\            National Center for 
E-mail: phil at spock.uark.edu         /  \           Resource Innovations     
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