[Proj] So close -- Lat / Long to Pennsylvania State Plane North NAD27

Mikael Rittri Mikael.Rittri at carmenta.com
Sun Jul 28 17:03:55 EST 2013

I think you don't have the grid shift files that are required for
the Proj.4 default datum shift between NAD27 and WGS84.
The files are called alaska and conus, and NTv2.gsb for
Canada, and should be in the "nad" directory I think.
The US files can require an extra manual command to
generate, if you build Proj.4 yourself.

You can read more about this on the Proj.4 FAQ.

Best regards,

Mikael Rittri

26 jul 2013 kl. 20:50 skrev "Jeremy Boecker" <jeremy.boecker at gmail.com<mailto:jeremy.boecker at gmail.com>>:

Thank you, I tried what you said, and what I'm getting as output is as follows when I run the same batch file:

*       * 0.000
*       * 0.000
2502332.66      416669.38 0.000

I'm thinking my EPSG definitions might be messed up somehow... but I also tried copying from <http://spatialreference.org> spatialreference.org<http://spatialreference.org>, and still I get the same output. (It seems like the 4326 EPSG is not working... )  Any further ideas? Your second result is the correct and expected conversion result... not sure why I'm getting asterisks and zeros for the same command! :/ Thanks again for your help!!
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