3D Modeling Method for Dome Structure Using Digital Geological Map and DEM

Geological maps have wide coverage with low acquisition difficulty. When other geological survey data are scarce, they are a valuable source of geological structure information for geological modeling. However, for structures with large deformation, geological map information has difficulty meeting...

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Bibliographic Details
Published in:ISPRS international journal of geo-information 2022-06, Vol.11 (6), p.339
Main Authors: Liu, Xian-Yu, Li, An-Bo, Chen, Hao, Men, Yan-Qing, Huang, Yong-Liang
Format: Article
Language:English
Subjects:
Accuracy
attitude calculation
Attitudes
Automation
Curves
Deformation
digital geological map
dome structure
Domes
Earth science
Fault lines
Geologic mapping
Geological mapping
Geological maps
Geological structures
Geological surveys
Geology
interface generation
Interfaces
Knowledge
Methods
Mining
Modelling
Stitching
Stratigraphy
Surveying
Three dimensional models
three-dimensional geological modeling
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Summary:Geological maps have wide coverage with low acquisition difficulty. When other geological survey data are scarce, they are a valuable source of geological structure information for geological modeling. However, for structures with large deformation, geological map information has difficulty meeting the requirement of its 3D geological modeling. Therefore, this paper takes the dome structure as an example to explore a 3D modeling method based on geological maps, DEM and related geological knowledge. The method includes: (1) adaptively calculating the attitude of points on the stratigraphic boundaries; (2) inferring and generating the bottom boundary of the model from the attitude data of the boundary points; (3) generating the model interface constrained by Bézier curves based on the bottom boundary; (4) generating the top and bottom surfaces of the stratum; and (5) stitching each surface of the geological body to generate the final dome model. Case studies of the dome in Wulongshan in China and the Richat structure in Mauritania show that this method can build a solid model of the dome based only on geological maps and DEM data, whose morphological features are basically consistent with those embodied in the section view or the model generated by traditional methods.
ISSN:2220-9964
2220-9964
DOI:10.3390/ijgi11060339