This material will help you understand
the fundamentals of aerial photography by explaining some basic technical
concepts and providing many samples of the images available from the
National Air Photo Library.
Early European explorers of this country's vast geography
made maps using a variety of instruments, from compasses to survey
chains. Learn how cartography, the science of mapping, is now high-tech.
Did you know that a male polar
bear can weigh up to 700 kg? Or that "pingos" are ice mountains?
Take a ride, explore the Arctic, and you'll discover many other
interesting facts.