We collect it via airplane and satellite, but also just about any way you can imagine getting a camera above the Earth’s surface: hot air balloons, model airplanes – even kites. The traditional aerial survey involves mounting a special gyroscopic, stabilized camera in the belly of an airplane and flying it at an elevation of between 15,000 feet and 30,000 feet, depending on the resolution of imagery you’re interested in.
If you are a fan of Google Earth (and who isn’t), you’ll love this quick run-through on the process of getting imagery implemented. One thing is for sure… it’s not a simple process. I guess that’s a no-brainer.
Source: Google