Wetlands are, by their very nature, ephemeral and transitional, which makes them challenging to characterize. Yet the need for characterizing wetlands continues to grow, particularly as we develop a better understanding of the wealth of ecosystem services that they provide. This book provides practical tools and methods to help practitioners more effectively locate, identify, and map the extent of wetlands, and therefore better understand the importance of wetlands to society and the larger landscape. The authors address jurisdictional, regulatory, and practical applications from the scientific, engineering, and lay perspectives. Numerous techniques, examples, figures, and lessons learned supply the ideas and solutions needed for solving the complex issues associated with wetlands. This second edition has been updated throughout and includes more techniques, examples, and illustrations.