Experts from the University of Milan have been investigating Forni Glacier in the Italian alps for decades, resulting in the archive of a cumbersome mass of observed data. While the analysis of archive maps, medium resolution satellite images and DEM's may provide an overview of the long-term processes, the application of close-range sensing techniques offers the unprecedented opportunity to operate a 4D reconstruction of the glacier geometry at both global and local levels. In the latest years the availability of high-resolution DEM's from stereo-photogrammetry (2007) and UAV-photogrammetry (2014 and 2016) has allowed an improved analysis of the glacier ice-mass balance within time. During summer 2016 a methodology to record the local disruption processes has been investigated. The presence of vertical and sub-vertical surfaces has motivated the use of Structure-from-Motion Photogrammetry from ground-based stations, which yielded results comparable to the ones achieved using a long-range terrestrial laser scanner. This technique may be assumed as benchmarking for accuracy assessment, but is more difficult to be operated in high-mountain areas. Nevertheless, the measurement of GCP's for the terrestrial photogrammetric project has revealed to be a complex task, involving the need of a total station a GNSS. The effect of network geometry on the final output has also been investigated for SfM-Photogrammetry, considering the severe limitations implied in the Alpine environment.
Local and general monitoring of forni glacier (Italian alps) using multi-platform structure-from-motion photogrammetry / M. Scaioni, M. Corti, G. Diolaiuti, D. Fugazza, M. Cernuschi. - In: INTERNATIONAL ARCHIVES OF THE PHOTOGRAMMETRY, REMOTE SENSING AND SPATIAL INFORMATION SCIENCES. - ISSN 1682-1750. - 42:2W7(2017 Sep 14), pp. 1547-1554. ((Intervento presentato al convegno ISPRS Geospatial Week nel 2017.
|Titolo:||Local and general monitoring of forni glacier (Italian alps) using multi-platform structure-from-motion photogrammetry|
|Parole Chiave:||Forni Glacier; Glaciology; Photogrammetry; Quality Assessment; Structure-from-Motion; UAV/UAS|
|Settore Scientifico Disciplinare:||Settore GEO/04 - Geografia Fisica e Geomorfologia|
Settore ICAR/06 - Topografia e Cartografia
|Data di pubblicazione:||14-set-2017|
|Enti collegati al convegno:||III/6, Remote Sensing Data Fusion|
WG III/1, Thematic Information Extraction
WG III/5, Information Extraction from LiDAR Intensity Data
|Digital Object Identifier (DOI):||http://dx.doi.org/10.5194/isprs-archives-XLII-2-W7-1547-2017|
|Appare nelle tipologie:||01 - Articolo su periodico|