Hi Kirk,

Thanks for your comments. I can add Warning areas pretty easily.
But, if you don't mind educating a land-locked Westerner a bit, I'd
like to know more about how and where Warning areas affect glider ops.
I guess I mistakenly assumed they didn't, so I intentionally excluded
them.

As far as the Grand Canyon goes, it does not currently appear in the
national Airspace System Resource File (NASR) database. I don't have
any source for the data that isn't covered by a copyright and/or
restricted copy license. As you may know, all of the rest of the data
on my site is free, and freely redistributable -- that's kind of it's
reason for existence. If someone can point me to a free source for
the Grand Canyon in a suitable format, I'll be happy to add it.

L.