2016 Unmanned aerial system (UAS)-derived orthoimage mosaics and digital terrain models of the SE margin and NE distal lava flow margin, Holuhraun lava flow-field, Vatnajökull National Park, Iceland

• Main Authors: Scheidt, Stephen P., Hamilton, Christopher W.
• Format: Dataset
• Language: unknown
• Published: University of Arizona Research Data Repository 2021
• Subjects: Planetary Geology; Planetary Science; 40314 Volcanology; FOS Earth and related environmental sciences; Holuhraun; Vatnajökull; Iceland
• Online Access: https://dx.doi.org/10.25422/azu.data.13277638.v1; https://arizona.figshare.com/articles/dataset/2016_Unmanned_aerial_system_UAS_-derived_orthoimage_mosaics_and_digital_terrain_models_of_the_SE_margin_and_NE_distal_lava_flow_margin_Holuhraun_lava_flow-field_Vatnaj_kull_National_Park_Iceland/13277638/1

Using the UX5-HP imaging system, aerial images were acquired over the SE and NE Holuhraun lava flow margin, adjacent interior and adjacent river systems. The images were captured in JPEG format using a Sony A7R digital camera with a 36 megapixel high-sensitivity CMOS sensor and a 15 mm focal length lens. Images were geocoded after postprocessing of the device's onboard GNSS GPS receiver and a Trimble R10 Differential Global Positioning System (DGPS) base station. The R10 DGPS is capable of producing survey points with excellent precision (0.8 cm horizontal and 1.5 cm vertical). This allows calculation of the plane’s exact flight paths. Combined with the exact timing of the camera shutter, the positions of each image acquisition is known during the flight path and are therefore airborne control points. Images were processed into geodetically-controlled digital terrain models (DTMs) and orthomosaics using the commercial software package Trimble Business Center version 3.81. The mean standard deviations (at ±1σ) in the x, y, and z directions (i.e., latitude, longitude, and elevation) of terrain points for 2016 are estimated to be ± 3.0 cm, ± 4.0 cm, and ± 6.4 cm, respectively. The orthomosaic tiles have a spatial resolution of 4 cm/pixel; the DTM has a resolution of ~19.6 cm/pixel. Topic Categories (ISO 19115) elevation, geoscientificinformation, imageryBaseMapsEarthCover Feature and Attribute Definitions A georeferenced raster displaying elevation data generated from digital camera image data using multi-view stereophotogrammetry methods. Date of Content 2016-07-30 to 2016-07-31 For inquiries regarding the contents of this dataset, please contact the Corresponding Author listed in the README.txt file. Administrative inquiries (e.g., removal requests, trouble downloading, etc.) can be directed to [e-mail] This item is part of Unmanned aerial system (UAS)-derived orthoimage mosaics and digital terrain models of the northeastern portion of the Holuhraun lava flow-field, Iceland