You should be able to do one .cfg file for the entire site using SPC and a geoid without doing a site calibration. Then if the grading plan will not load due to the size of the file you can break down the design into segments and even overlap them some and include the original cfg file in the folder for each segment.
I personally don't think one design file for an area that large will load in the machine but I could be wrong. My wife says I usually am.
James
You should be able to do one .cfg file for the entire site using SPC and a geoid without doing a site calibration.
That's what I thought. The models won't cover the entire area, just for roads and small areas within the larger mapped area. It is unwieldy to do many calibrations and upload them into the computers on board so they only want one, which made me argue for no calibration. I suppose I can do a calibration to ten or so points in across the entire complex and see how the errors come out. When I told them they don't have to leave the office to calibrate they couldn't understand that, but there is really no reason to go to the field to calibrate that is established using a projection and Geoid model
If you have the ability to parse down the geoid file to an area a few miles larger than the area you are working in, it might make it a little more palatable for the machines to handle. I have always wanted to try that, just never figured out how.
James
Of course if they calibrate the Geoid model is probably not useful. Way back in the late 90's I experimented doing a calibration while also applying a Geoid model but never got very good results doing it so I stopped even trying it.
Guess it's time to try some calibrations and see just how much error they cause.
Just did a calibration on a small road job using a geoid and the Trimble guy had to remove it from the calibration to make it work. Sounds like you need to talk to their equipment dealer and see what they say you can do. Not the salesman, but a support guy.