Although they look similar on this map, the road and the river are examples of the two different types of geography: physical and human. Amber: That sounds complicated! Mr Lewis: Not really.

When it comes to understanding terrain, his knowledge is ... of five map symbols that apply to every map. However, topographic maps, which depict physical features of the Earth’s surface ...

NASA and the French space agency CNES's SWOT satellite provides researchers with the tools to create the most accurate ocean maps yet.