Polyhedral modelling with exact arithmetic
SMA '95 Proceedings of the third ACM symposium on Solid modeling and applications
An approach to the integration of spacial data and systems for a 3D geo-information system
Computers & Geosciences - Special issue on system integration within the geosciences
Visualization of complex geological structures using 3-D Bézier construction tools
Computers & Geosciences
A system for reconstructing and visualising three-dimensional objects
Computers & Geosciences
Geomodeling
Representation of non-manifold objects
SM '03 Proceedings of the eighth ACM symposium on Solid modeling and applications
An approach to computer modeling and visualization of geological faults in 3D
Computers & Geosciences
Building solid models from boreholes and user-defined cross-sections
Computers & Geosciences
An effective method for 3D geological modeling with multi-source data integration
Computers & Geosciences
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The technique of 3D geological modeling (3DGM) is an effective tool for representing complex geological objects. In order to improve the accuracy of geological models applied in numerical simulation methods such as finite elements and finite differences, we can use 3DGM as a modeling tool. To do this, however, 3DGM must provide the ability to model geological and artificial objects in a unified way, and its geological model must be seamless for mesh generation. We present the concept of a sealed engineering geological model (SEGM), and describe its topological representation. Three kinds of conditions: geometric continuity, topological consistency and geological consistency, which must be satisfied by SEGM, are discussed in detail. A new method for constructing an SEGM based on a wire frame is proposed. It includes three main components: wire frame construction, interface modification and reconstruction, and block tracing. Building a unitary wire frame, which is composed of many simple arcs and connects all interfaces seamlessly, is the key of this method. An algorithm, involving two intersections computations and partition of simple arcs, is proposed for building a wire frame. Additionally, we also propose a local iterative algorithm for computing fault traces. As an example, we build an SEGM for the dam area of a hydraulic engineering project in the HuNan province of China.