This is an excellent text providing a complete overview of the principles of digital terrain modeling. The reader will obtain a thorough understanding of terrain modeling from data sources and acquisition methods, to surface modeling. It provides insight into the methodology of creating a triangular irregular network, or TIN, model. It also provides insight into contouring, aspect angles, slope, drains (hydrological interpretation), etc. It also provides an excellent discussion of error and accuracy and how each are affected in the different phases of terrain data processing, from source/acquisition to final digital elevation model. Many mathematical methods are presented. I would recommend this text to anyone wishing to obtain an understanding of the processes and methodologies behind digital terrain modeling. The only reason that I did not give this text a 5-star rating is that I would have liked to have seen a more in-depth examination of efficient data processing algorithms with examples. But this is a minor deficiency and I would not let this keep someone from purchasing this text if he/she wishes to obtain a full understanded of digital terrain modeling. The References section is also quite useful pointing to many other interesting sources of information to further your knowledge.