Abstract:

The previous three-dimensional geological map only use a digital elevation model (DEM) to expand the plane geological map in z-axis direction, so it does not contain a true three-dimensional attribute information and spatial information. As a result, it shows obvious limitations in spatial query, analysis and decision-making. The characteristics of the ground-underground data and the existing data model is analyzed, then the UML modeling tool is used to design the ground-underground, geological-geographic, attribute-space integrated database model based on Geodatabase data model; a prototype database integration of above and below ground is designed; the ideas and methods of three-dimensional geological map compilation in ArcGIS Engine environment is discussed in the idea of integrated modeling of above and below ground; the compilation of geological map with a true three-dimensional characteristics such as spatial query, analysis is realized. At the end, a system prototype is developed to test the rationality of the method. Result shows that seamless integration problems can be solved on the ground floor underground integrated modeling three-dimensional model of the underground，integrated approach to spatial three-dimensional geological map compilation is feasible and practical.

Key words: three-dimensional geological map, up and down integration, integrated modeling, Geodatabase, ArcGIS Engine