Comparison of facet (plugin) and discontinuity set extractor (dse) softwares performance for uav-photogrammetric mapping at cima quarry, Perlis

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Date
2019-07
Authors
Nur Syafiqah Binti Ahmad Shukri
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This project aimed to study the geological structure of limestone and to determine the effectiveness accuracy between FACET plugin and Discontinuity Set Extractor (DSE) software in the geotechnical mapping of discontinuities. An Unmanned Aerial Vehicle (UAV) was used for geotechnical mapping while Agisoft Photoscan 3-D, Cloud Compare, FACET plugin, Discontinuity Set Extractor (DSE), and Dips Software were used to analyze the photogrammetry method before compared with conventional mapping. The study area is at CIMA Quarry, Perlis with two (2) windows were identified comprised the whole quarry. The result from DSE shows three (3) discontinuity set for Window A while four (4) discontinuity set for Window B. The most dominant direction for Window A at N-S trend while for Window B at SE-NW trend. The result from FACET shows four (4) discontinuity set for Window A and four (4) discontinuity set for Window B. The most dominant direction for Window A at N-S trend while for Window B at E-W trend. Rossette plot results for Window A shows a significantly different from manual mapping while similar for Window B. In comparison, data extracted from Discontinuity Set Extractor (DSE), are more in quantities compared to FACET plugin so it provides more accurate data. In conclusion, DSE suitable to use for the photogrammetry mapping compared to FACET plugin. To get better validation accuracy, more window need to be taken for the future research. So, photogrammetry mapping method are valid to the manual mapping.
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