Generation of digital terrain model and extraction of geomorphometric parameters from data collected by remotely pilot aircraft
DOI:
10.22238/rc2448269220191702247264Keywords:
Geomorphology; Geomorphometry; Digital Relay Analysis; Topographical attributes.Abstract
The relief morphometry can be analyzed by the extraction of geomorphometric parameters from digital terrain models (MDT). High resolution MDT can be obtained by aero-surveys with remotely piloted aircraft (RPA). The objective is to generate MDT from aerial surveying with RPA and to analyze the extracted geomorphometric parameters. It was performed aerial survey with a RPA model Phantom 4 Advanced in a first order basin located 3 km from the city of Medianeira (western Paraná). The data collected was processed in Agisoft PhotoScan 1.2.4. The generated point cloud passed through filtering and was interpolated via kriging in ArcGIS 10.1, resulting in the MDT. The geomorphometric parameters were extracted in SAGA GIS 2.3.2. The study area presents mostly planar-rectilinear slopes with slopes of up to 5 degrees and low values of UTI. In the first-order river valley, convergent-concave slopes were found marked by slopes of 5 to 9 degrees, associated with high UTI values. The generated MDT allowed the identification of features observed in the field. In conclusion, that data collected by RPA has great potential for morphometric characterization in relief detail.
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