[postgis-users] NAD conversion problem

[Peter N. Schweitzer]

Dylan Beaudette wrote:
> Looks close to the output from proj4 above.
> 
> Thoughts?

Dylan,

Thanks for showing me how to check the calculations.  I get identical
results using my copies of cs2cs and postgis, on both systems.
I conclude from this that the effect of adding @null to the definition
of NAD27 in pj_datums.c is that it somehow eliminates the error message
but doesn't render the results incorrect.  I don't pretend to understand
why this is so, but I'm happy to proceed with this configuration.

Thanks again for your help!

Peter
-- 
Peter N. Schweitzer (MS 954, U.S. Geological Survey, Reston, VA 20192)
(703) 648-6533  FAX: (703) 648-6252  email: pschweitzer at usgs.gov
<http://geology.usgs.gov/peter/>