Research on urban 3D geological modeling based on multi-modal data fusion: a case study in Jinan, China

Urban underground 3D geological modeling can accurately express various geological phenomena and provide a decision-making basis for urban planning and geological analysis. The construction of smart cities has put forward new requirements for the automation and intelligence of urban geological 3D modeling. Geological survey reports are important reference data for urban geological 3D modeling. However, a large number of geological maps, geophysical data, and other geographic quantitative data of geological science surveys have been buried in geological survey literature and have not been effectively used. Currently, the development of data mining and information extraction technology provides the possibility to integrate these data into 3D geological modeling. Therefore, this study designed the workflow of 3D geological modeling using a geological survey report. First, after the geological survey report was deconstructed, the geological text information was recognized and extracted using geological dictionary matching and pattern rule matching, and the integration of knowledge was provided in the form of a knowledge graph. Then, the drilling information and table data in the drilling histogram are automatically extracted. Through these methods, the unstructured geological survey report can be transformed into structured data and integrated into the 3D geological modeling process. Finally, the 3D geological modeling of the Bridge Group in Jinan based on the Jinan urban geological survey report was taken as an example to verify the feasibility of the proposed method and demonstrate the potential of text mining and information extraction of geological survey reports for 3D geological modeling, which provides geological data support for the transformation of old and new kinetic energy and the construction of major projects of government departments.