Want to make one of your own? You can download it here and the piecing guide can be found here.
There are a couple of glitches still with the software I use to make these patterns, so you'll have to glue/tape pieces G1 to H1 together before you sew, same goes to C/D, P/O and also sections A1/A2 can be attached to B1/B2 before sewing. For some reason I can't get the program to leave those attached. I'm sure it's user error, but you can still use the pattern as is.
The piecing guide is shown here:
Sew AB, to CD
Sew F to,G/H to I to J-to K
Sew FGHIJK --to ABCD
Sew M to N to L
MNL to AB...K Set aside
Sew OP to Q to R to S. Set aside
Sew Xto W to V to U to T
Attach TUVWX to PQRS then attach Y
Attach the top and bottom halves of the map and you are done!
Now go whip one up and when you're done you can put your tall frosty glass of lemonade (or other beverage) on it! I hope you have a Happy 4th with friends or family and lots of good BBQ! Happy Sewing!