Visualization and analytical techniques for the solid models of geological entities are the intuitionistic

convenient approaches to express complicated geological structures and property parameters inside the geological body. In 3D geological modeling

it is one of the most important research fields that focus on visualization representation and analysis of the complicated geological data

interactive revelation and analysis for 3D geological models. This paper introduces the general operations for 3D-interaction of the solid models of geological entities. It expounds the interactive and analytical technique for the 3D geological model. It realizes several visual operations on 3D geological model including geometric transformation

spotting and the measurement of property value in any spatial position

slice up

virtual drilling

virtual roam

the excavation of foundation pit and tunnel. Those operations

which are based on software-oriented techniques

use 2D devices such as keyboard and mouse to the simulation of 3D spatial data

and will increase the comprehension of 3D geological model.