Satellite images, which are accurate photographs of the Earth's surface, allow cartographers to precisely determine the location of roads, cities, rivers, and other features on the Earth. These images help cartographers create maps that are more accurate than ever before.

What effect do satellites have on mapmaking?

Satellites have increased the speed at which data can be collected and have dramatically expanded the range of mappable information.

How do satellites create maps?

The answer is simple: the satellite camera takes two photographs in one time slot. The first one is taken in black and white, and the second one is a colour image. And for those few microseconds between shots plane manages to fly some distance and therefore on the satellite map, a copy appears.