Some of my students have been having intermittent, strange problems reprojecting. They’ve received errors that there are no projection parameters. I sent in a report a couple months back but neither I nor others have been able to replicate this in a consistent way.
I may have figured out what is happening. I think it’s a problem with NAD and Windows. I don’t remember the reason, but there needs to be special treatment of NAD projections at build time. I think it’s because the projection information is stored in a special file and not in the normal PROJ data file. When I compile on my Mac, I need to …
export NAD2BIN=/Library/Frameworks/PROJ.framework/Programs/nad2bin
…before compiling to make sure that I get proper information for NAD projections.
In fact, it seems like it is necessary to call a linux/unix program to handle NAD projections and that this may not be available in Windows. I wonder if this is not happening with the native Windows build and causing problems when the students use locations with NAD projections.
Does this make sense?
Michael
Michael Barton, Professor of Anthropology
Director of Graduate Studies
School of Human Evolution & Social Change
Center for Social Dynamics & Complexity
Arizona State University
phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton