Geological structures are irregular and intricate, so creating a 31) solid
geology model is a complicated process. A software system can only
partially automate this process, since geological knowledge and
experience are required. Therefore, the interaction of a geologist is critical
for such a system. This paper discusses some useful advanced functions
for enhancing the visualisation and manipulation of 3D solid geology
models: flexible attribute display, multiple views, auxiliary display
objects, and geologically sensitive operations. It also describes some
experiments to explore the effectiveness of these functions and presents
sample output. Most existing 3D solid geology modelling systems are
implemented in an ad hoc way, which greatly reduces their reusability
and extensibility. This paper presents a generic framework for 3D solid
geology modelling systems, which is based on object-oriented
technology. The deficiencies of current systems may be improved by
using this generic framework. A modelling process based on drillhole
data is discusses as a case study.