hi Ted,
they are your airport sectional maps.
you can buy them at your small local FBO like airport.
same maps you use to get radial VOR co-ords to file a waiver.
one whole US master is online, posted here on r.m.r. about a quarter ago, let me see if I can find,
looking....looking...looking...
ya know that dog that scratches about while you are searching ?
he came from the Microsoft Bob program Gates' wife put together,
oops sorry , cliff claven like trivia....
here you go,
it's better to use real maps, more interactive to me ;)
I really owe that link to another r.m.r poster and could not find his name to reference credit since credit is due, sorry.
I'll try to dig up his name, the uncontrolled airspace is dark blue bands with a smooth line on one side and a blurring line on the other and marking saying 9,600 14,300 etc..
look near black rock he posted last, it's like 9.6 and 14k uncontrolled. but that is MSL not AGL.
and the rock is at 4K already.
look around phoenix lots of uncontrolled space in certain areas.
you can also fly your unmanned rocket in certain restricted airspace IF you have the militaries permission.
look at the thumb of Michigan.
CD