1. Introduction -- 2. Terrain descriptors and sampling strategies -- 3. Techniques for acquisition of DTM source data -- 4. Digital terrain surface modeling -- 5. Generation of triangular irregular networks -- 6. Interpolation techniques for terrain surface modeling -- 7. Quality control in terrain data acquisition -- 8. Accuracy of digital terrain models -- 9. Multi-scale representations of digital terrain models -- 10. Management of DTM data -- 11. Contouring from digital terrain models -- 12. Visualization of digital terrain models -- 13. Interpretation of digital terrain models -- 14. Applications of digital terrain models -- 15. Beyond digital terrain modeling.