Towards Better Visualisation of Alpine Quaternary Landform Features on High-Resolution Digital Elevation Models
نویسندگان
چکیده
Alpine topography is formed by a complex series of geomorphological processes that result in vast number different landforms. The youngest and most diverse landforms are various Quaternary sedimentary bodies, each characterised its unique landform features. formation bodies their features derive from the dominant building processes. In recent years, studies have been greatly aided use digital elevation models (DEMs) derived airborne laser scanning (ALS). High-resolution DEMs allow detailed mapping detection surface changes, recognition often displayed as hillshaded reliefs, common visualisation technique, which suffers limitation single illumination source. As result, can be barely visible or even invisible to viewer if they parallel light source hidden shadow. These limitations become challenging when representing subtle landscape alpine topography. this study, we focus on eleven visualisations morphological 0.5 m resolution DEM. We qualitatively compare analytical hillshading with set techniques contained Raster Visualisation Toolbox software, primarily multiple directions RGB, 8-bit sky view factor slope. aim determine technique best suited for visual sedimentation landscapes. Detailed examination previously documented Pleistocene moraine lacustrine deposits, Holocene alluvial fans, scree debris flow fluvial deposits created revealed several small-scale were difficult impossible detect aerial photographs. Hillshading resulted could universally applied across mountainous hilly terrains. contrast, slope better visibility facilitated interpretation (less than ten metres)
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ژورنال
عنوان ژورنال: Remote Sensing
سال: 2021
ISSN: ['2315-4632', '2315-4675']
DOI: https://doi.org/10.3390/rs13214211