Much of the information included on maps is coded using a variety of symbols. The symbols have to be interpreted in order for the information to be accessed. One Table of Contents Knowledge Globes and maps show natural geographic features. In comparing land and water surface, the earth has considerably more water surface than land. Optional Colour coding on some globes and maps indicate elevation.
Legends identify the meaning of the colours.
River systems provide a clue to elevation. Knowledge A grid system is useful to establish relative location. Lines of longitude and latitude are a type of grid system. Optional Lines of longitude are used as a guide to establish time zones. Lines of latitude show location relative to the equator and poles.