The National Geographic Trails Illustrated Mapping Software Fly Over Feature - this is photo of my computer screen with the "flyover" on the left, and the location of my route on the right National Geographic Topo Fly Over Feature Technical Details Camera: Canon PowerShot SD1000 Taken: August 19, 2010 Focal length: 5mm Aperture: f/2 Exposure: 1/60 second ISO: 160