Feature Request: Bounding box to drop anything outside of it

I took the output from the past 4-5 days and shoved it into a google fusion table so I can see roughly my coverage before and after an antenna move. I found that I got lat/log sometimes on the other side of the world from where I am at. A simple command line option to add a bounding box so if outside of the box, consider the data packet invalid.

See following link for pretty coverage map of before the antenna move.
https://www.google.com/fusiontables/embedviz?viz=MAP&q=select+col6+from+1qFXBYtP15niuh6TaZAW9er_aQt1DTXPzDKmmZu4&h=false&lat=35.254066939198324&lng=-80.96867563472358&z=9&t=1&l=col6&y=2&tmplt=3