Antrittsvorlesung von Prof. Dr. Gottfried Mandlburger, TU Wien zum Thema Optical Hydrography: Charting the underwater world with photos and laser scans
Dr. Gottfried Mandlburger
Veranstaltungsort
Hybrides Setting:
TU Wien "Freihaus"
Wiedner Hauptstraße 8, 1040 Wien
Raum: Freihaus, HS7, gelber Bereich, 2. Stock
Wegbeschreibung
UND
Digital in Zoom:
https://tuwien.zoom.us/j/69696365603
Inhalt:
Either sound or light is used to measure topography, vegetation and objects under water. SONAR (Sound Navigation And Ranging) is suitable for measuring great water depths. However, active and passive optical methods are advantageous in shallow water areas. In this case, measurements are taken using cameras or laser scanners that are either deployed from space, from the air or under water. Large areas can be efficiently captured from space and from the air, and underwater sensors enable a high spatial resolution of the objects captured. A prerequisite for all optical methods is sufficient water clarity. The extreme flooding in eastern Austria in September 2024 once again highlighted the importance of a precise 3D database for watercourses. This database serves as a basis for flood forecasts using hydrodynamic-numerical modelling, from which hazard zone plans and protective measures can be derived. Optical bathymetry is already making a significant contribution to this through the systematic surveying of rivers. In addition, optical methods can also be used for as basis for ecological studies (hydrobiology, eco-hydraulics, habitat modelling, etc.). Besides pure mapping of underwater topography, research is increasingly focusing on the recording and modelling of underwater vegetation, especially in the context of climate change. Finally, underwater surveys with images and scans have become an essential pillar for monitoring submerged infrastructure (dam walls, turbines of hydro-power plants, pillars of off-shore wind mills, etc.). The talk is the inaugural lecture for the professorship in optical bathymetry, which is located in the research area of photogrammetry at the Department of Geodesy and Geoinformation at TU Wien. In addition to an introduction to the fundamentals of laser and photobathymetry, the lecture provides insights into current research topics such as the recording and consideration of complex dynamic water surfaces in the evaluation of image and scan data, the improvement of underwater object recognition through specialised analysis of bathymetric laser waveforms and the 3D modelling of underwater vegetation as a basis for climate research. Examples from current teaching, where optical hydrography is used in lectures and exercises as well as in the context of final theses, round off the presentation.
Vortragender:
Gottfried Mandlburger studied geodesy at TU Wien, where he also received his PhD in 2006 and habilitated in photogrammetry with a thesis on "Bathymetry from active and passive photogrammetry" in 2021. In April 2024 he was apointed University Professor for Optical Bathymetry at TU Wien. His main research areas are airborne topographic and bathymetric LiDAR from crewed and uncrewed platforms, multimedia photogrammetry, bathymetry from multispectral images, and scientific software development. Gottfried Mandlburger is chair of the DGPF working group LiDAR and Austrians scientific delegate in EuroSDR. He received best paper awards from ISPRS and ASPRS for recent publications on bathymetry from active and passive photogrammetry.
Hinweis: Der Vortrag wird in englischer Sprache gehalten und evtl. gefilmt und danach im Internet veröffentlicht.
Beginn
26. März 2025 - 17 Uhr 00