This book will be an update to a classic in the field of surveying. It is a stand alone book dealing with the important issue of error in spatial data. Originally published by Paul Wolf in 1980, this book is widely known for its comprehensive yet understandable treatment of adjustment computations and error correction of spatial data. While it was originally written for surveyors, it has expanded over the years to encompass the needs of new spatial technologies as they've been introduced (GPS, GIS) and new analytical techniques as they find acceptance. This sixth edition offers more robust pedogogical components for both student and instructor use including new video lessons, updated problems, and Power Point slides exclusively for instructors' lecture material.