Naslov
Comparison of photogrammetry models obtained by various image acquisition techniques on Šterna badland in Istria
(Comparison of photogrammetry models obtained by various image aquisition techniques on Šterna badland in Istria)

Autori
Frangen, Tihomir ; Bostjančić, Iris ; Gulam, Vlatko ; Gajski, Dubravko ; Pollak, Davor ; Pavić, Mirja ; Zalović, Luka ; Mihoković, Viktor

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
6. hrvatski geološki kongres s međunarodnim sudjelovanjem: Knjiga sažetaka - 6th Croatian Geological Congress with international participation: Abstracts Book / Horvat, Marija ; Matoš, Bojan ; Wacha, Lara - Zagreb : Hrvatski geološki institut, 2019, 64-66

Skup
6. hrvatski geološki kongres s međunarodnim sudjelovanjem

Mjesto i datum
Zagreb, Hrvatska, 09.10.2019. - 12.10.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
Photogrammetry ; 3D model ; badland ; denudation ; UAV

Sažetak
To understand the dynamics of badland denudation and quantify temporal changes, it is necessary to get the exact measures of their morphology. In that sense, the use of photogrammetry proved to be a good tool for badland 3D model creation. The test polygon is established on Šterna badland in Istria, covering app. 37.000 m2. Within, for close range photogrammetry, several smaller pilot polygons are defined, with an area of several square meters. Several image acquisition techniques were used to obtain photogrammetry models, including two different methods, airborne and terrestrial. For airborne image acquisition different UAV (unmanned aerial vehicle) types were used, fixed-wing (senseFly eBee and Topcon Sirius Pro) and multicopter UAVs (senseFly Albris and Falcon 8+ Topcon Edition). The flights were performed at different altitudes combining automated, semi- automated and manual flight modes. Ground-based images were taken using DSLR camera (Nikon D610 with 35 mm f/2 lens) with and without the tripod, and mobile phone camera (Huawei P8 Light). To test the difference of digital surface models (DSMs) obtained by different image acquisition techniques, a preliminary analysis was performed in GIS environment. For that purpose, all DSMs that were processed for one pilot polygon were compared. The cell values (Z coordinate) of DSMs were extracted for 100 points randomly created within the polygon of 7.45 m2 and compared. DSM obtained from images acquired by DSLR camera with tripod was taken as the reference model. The first results of DSMs comparison are presented.

Izvorni jezik
Engleski

Znanstvena područja
Geodezija, Rudarstvo, nafta i geološko inženjerstvo, Interdisciplinarne tehničke znanosti

POVEZANOST RADA