Geographic information systems (GIS) - a central repository of geographic data collected from various sources, including satellites and GPS is emerging as one of the most intriguing and promising high-tech fields. Today, many technical, managerial, engineering, and academic positions require GIS skills, and this easy-to-understand resource answers the call. The book examines and explains all of the critical GIS concepts in a clear voice and in a consistent structure. It provides technical and non-technical professionals, regardless of their background, with an accessible and practical guide to important GIS know-how. While other GIS-learning sources are software-product biased, this unique volume offers an unbiased approach to the fundamentals of learning GIS, helping the reader become functional and knowledgeable in this burgeoning area.