Abstract
Three-dimensional geological modeling (3DGM) is a complicated project in the research of the three-dimensional geographic information system, and there have many data model for the geological modeling by now. The thesis introduces a kind of object-oriented data model: the Component-based Topological Data Model (CTDM). Based on the modeling principles analysis, the author discusses and gives out the modeling steps, especially on the spatial section location, coordinates conversion, Component definition and the geological volume representation from this data model. In the end of the paper, an example was completed by the primal system for geological modeling, which was accomplished by using the CTDM.
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