การสร้างแบบจำลองธรณีวิทยา 3 มิติของหินตะกอนและหินแปร จากข้อมูลการสำรวจธรณีวิทยาภาคสนามบนโปรแกรมอาร์กวิว / สนธยา โชคเศรษฐกิจ = 3D geological modeling of sedimentary and metamorphic rocks from geological mapping data on Arcview program / Sonthaya Choksattakig
The use of 3D modeling to represent geological data can display stratigraphy and geological structure distinctly, particularly in depth dimension. Nowadays, Geographic Information System (GIS) program becomes the effectual tool which can provide geological data management, 3D visualization and display. The objective of this study aims at developing 3D modeling of sedimentary and metamorphic rocks using ArcView 8.1 and 3D Analyst 1.0. The processes include 2 modules: 1) preparing and analyzing geological data captured in form of GIS data and 2) 3D modeling geological planer structures and rock sequences. The study results are geological cross-section and Triangulated Irregular Network (TIN) surfaces of rock contact and fault planes. The first module involves analysis of rocks and geological structures in terms of grouping, age sorting, and polylines ordering. The ordered polylines of study area boundary, faults and rock boundaries are used in the second module to generate TIN surfaces orientated according totheir attitude information. The cross-section is constructed using elevation data extracted from each TIN surface profiles and rock sequences from ordered polylines. The final result is geological cross-section showing relationship of rock units and fault surfaces with 3D coordinates.