20.500.12556/RUL-136223
Towards better visualisation of alpine Quaternary landform features on high-resolution digital elevation models
Alpine topography is formed by a complex series of geomorphological processes that result in a vast number of different landforms. The youngest and most diverse landforms are various Quaternary sedimentary bodies, each characterised by its unique landform features. The formation of Quaternary sedimentary bodies and their features derive from the dominant building sedimentary processes. In recent years, studies of Quaternary sedimentary bodies and processes have been greatly aided by the use of digital elevation models (DEMs) derived by airborne laser scanning (ALS). High-resolution DEMs allow detailed mapping of sedimentary bodies, detection of surface changes, and recognition of the building sedimentary processes. DEMs are often displayed as hillshaded reliefs, the most common visualisation technique, which suffers from the limitation of a single illumination source. As a result, features can be barely visible or even invisible to the viewer if they are parallel to the light source or hidden in the shadow. These limitations become challenging when representing landforms and subtle landscape features in a diverse alpine topography. In this study, we focus on eleven visualisations of Quaternary sedimentary bodies and their sedimentary and morphological features on a 0.5 m resolution DEM. We qualitatively compare analytical hillshading with a set of visualisation techniques contained in the Raster Visualisation Toolbox software, primarily hillshading from multiple directions RGB, 8-bit sky view factor and 8-bit slope. The aim is to determine which visualisation technique is best suited for visual recognition of sedimentary bodies and sedimentation processes in complex alpine landscapes. Detailed visual examination of previously documented Pleistocene moraine and lacustrine deposits, Holocene alluvial fans, scree deposits, debris flow and fluvial deposits on the created visualisations revealed several small-scale morphological and sedimentary features that were previously difficult or impossible to detect on analytical hillshading and aerial photographs. Hillshading from multiple directions resulted in a visualisation that could be universally applied across the mountainous and hilly terrains. In contrast, 8-bit sky view factor and 8-bit slope visualisations created better visibility and facilitated interpretation of subtle and small-scale (less than ten metres) sedimentary and morphological features.
visualisation techniques
lidar
DEM
Quaternary deposits
alpine environment
true
false
true
Angleški jezik
Ni določen
Članek v reviji
2022-04-20 13:01:44
2022-04-20 13:01:45
2022-09-15 04:13:35
0000-00-00 00:00:00
2021
0
0
22 str.
iss. 21, art. 4211
Vol. 13
2021
0000-00-00
Zaloznikova
Objavljeno
NiDoloceno
0000-00-00
0000-00-00
0000-00-00
55
2072-4292
10.3390/rs13214211
82150659
remotesensing-13-04211-v2.pdf
remotesensing-13-04211-v2.pdf
1
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4fb69a360f602b93ad1a7b847325fd4411ea9c5d879d2bfb730f38cddfb3efff
98fb5b4a-c099-11ec-8aca-00155dcfd717
https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=155755
https://www.mdpi.com/2072-4292/13/21/4211
0
47fcfb95-c099-11ec-8aca-00155dcfd717
https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=155754
Naravoslovnotehniška fakulteta
Fakulteta za gradbeništvo in geodezijo
0
0
0