On Thursday, November 20, 2014 11:05:10 AM UTC-5, Dan Marotta wrote:
A very good process!* I would only
object to the notion of "bias" towards the official data.*

Wrong is wrong, no matter who publishes the information.* If you
know that the official data is incorrect, publish the correct data
for glider use and notify the publisher of his mistake.* Maybe
he'll even correct it.
Dan Marotta

I agree in theory wrong is wrong but in all practical purposes how wrong does it have to be to matter? 0°00.001 ? .1 mile, .5miles?
I chose about 750 foot as some kind of standard for positional placement, I'm completely open to feedback on this. I've tried to navigate to data points dislocated from the airports by 1 add 2 miles and really struggled to find it [not fun when you are low]. But it was within about .3 miles [1500ft] I could usually spot it.

One concern is even though all the turnpoint files say "unofficial- use at your own risk" there does seem to be a preference to leave the responsibility with the FAA instead of modification for minimal gain in accuracy. Also each time you change it, Liebacher's program is going to try to "snap it back" to official data so that is just more work for everyone.

Chris