Zwahlen, Jodok and Schenker, Filippo and Spataro, Alessio (2022) Spatial resolution of 3D maps of a heterogeneous ultramafic lense at the Cima di Gagnone, Cima Lunga unit. In: Abstract Volume, 20th Swiss Geoscience Meeting, Lausanne 20th Swiss Geoscience Meeting, Lausanne.
Full text not available from this repository.Abstract
Remote sensing helps to evaluate quantitatively geological processes by increasing the precision of 3D geological maps, especially in areas that are poorly accessible. In addition, mapping of a 3D model is a far more time-efficitent process than field mapping. However, the spatial resolution of the 3D model might not allow for mapping of features with low color contrast. Therefore, the goal of this study is to investigate the feasibility and the maximum obtainable resolution of a digital geological map of a heterogeneous ultramafic body of 300 m length SSW of Cima di Gagnone. We used a drone to take images at regular intervals and in different directions to generate a 3D model of the outcrop. The model was georeferenced using control points, whose exact coordinates were obtained with GNSS (model Geomax Zenith25 – rtk modality) in the field. In a first step, the ultramafic body was mapped using the 3D model and the information published about the occurring lithologies and their approximate locations. In a second step, a detailed map of the ultramafic body was made directly in the field, using our high-precision 3D topographic model. In a last step, the produced maps were compared and discussed in terms of precision of limits, lithological content and of efficiency of methodology.
| Item Type: | Article in conference proceedings or Presentation at a conference (Poster) |
|---|---|
| Subjects: | Physical sciences > Geology Physical sciences > Geology > Geotechnology Physical sciences > Geology > Earth science > Geoscience |
| Department/unit: | Dipartimento ambiente costruzioni e design > Istituto scienze della Terra |
| Depositing User: | Filippo Schenker |
| Date Deposited: | 11 Jan 2023 13:18 |
| Last Modified: | 12 Jan 2023 08:24 |
| URI: | http://repository.supsi.ch/id/eprint/13716 |
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