This fourth edition serves as an excellent introduction to general cartographic principles and as an examination of the best ways to optimize the visualization and use of spatio-temporal data. It incorporates all the changes and new developments in the world of maps such as open street maps and gps-based crowdsourcing, the use of new web mapping technology, and adds new case studies and examples. Printed in full color, this fully-revised edition provides students with the knowledge and skills needed to read and understand maps and mapping changes, and offers professional cartographers an updated reference with the latest developments in cartography.