A Terrain Database Representation Based on an Extended Vector Product Format. - Mahdi Abdelguerfi; Edgar Cooper; Christ Wynne; Kevin Shaw; Vincent Miller; Robert Broome; Barbara Ray (CIKM, 1996)

An Extended Vector Product Format (EVPF) Suitable for the Representation of Three-Dimensional Elevation in Terrain Databases. - Mahdi Abdelguerfi; Edgar Cooper; Christ Wynne; Kevin Shaw (Int. J. Geogr. Inf. Sci., 1997)

Representation of 3-D Elevation in Terrain Databases Using Hierarchical Triangulated Irregular Networks. A Comparative Analysis. - Mahdi Abdelguerfi; Christ Wynne; Edgar Cooper; Roy Ladner; Kevin Shaw (Int. J. Geogr. Inf. Sci., 1998)