Laptop GPS

Its not really for between buildings. Im working on a municipal road construction project with blaster. I need to find what buildings fall within the blast radius and may be damaged. The effective blast radius is 600 feet.

I was hoping to go out in the field and mark 2 GPS coordinates and find the distance until I hit about 600.

I hate the dickless wheel that they use to measure distances now… it doesnt work over wooded and rough terrain which this site includes… plus its gay.