Re: Airport Mat from google map?
You can do this. I did it. You need to consider something.
Make a screenie of the area that You want. The more it fits already to the scale 1/400 the better it is, but I always needed to do a rescaling.
Cut the image to a standard paper size (e. g. US letter)
Enlighten the image with e. g. an Image editing tool. The screenies are mostly too dark.
- Goto a copy shop and print out Your ground foil onto a 200g paper there for less than two Dollars I would guess.
You need to do some trials in order to find out the picture fits to scale 1/400.
Compare e. g. a printed image with a plane on it to a 1/400 scale model that You have. I used b/w print on a standard paper e. g. 80g, that's cheaper.