Filters: Tags: field methods (X) > Categories: Data Release - In Progress (X)

Filters Date Range Past year (1) Past month (1) Past week (0) Past day (0) Custom range... To   Search Contacts Samuel Hudziak University of Iowa GS ScienceBase Ingrid Ukstins Samuel X. Hudziak Stephen S. Scheidt U.S. Geological Survey Categories Data (1) Tag Types Theme (1) Place (1) Tag Schemes None (1) USGS Thesaurus (1) Common geographic areas (1) ISO 19115 Topic Category (1) View Results as: JSON ATOM CSV

University of Iowa/ NASA GIFT Expedition to Askja, Iceland MSc Data collection: 2019, Dyngjusandur Sandsheet In Situ and Photogrammetric Ventifact Measurements We use the Dyngjusandur sandsheet, Iceland as a testbed to quantify the type of data necessary to accurately represent ventifact orientations and extract paleowind information through a statistical evaluation of the differences between photogrammetric based and in situ geological analysis. Forty representative ventifacts were selected for in situ measurement, 20 of which were imaged for photogrammetric analysis to produce oriented and scaled virtual 3D models. An additional set of measurements were made on the “synthetic” models to allow for statistical assessment of erosional feature orientation. Despite the similarity between the photogrammetric (1145 measurements), and the in situ datasets (500 measurements),... Categories: Data, Data Release - In Progress; Tags: Askja, Dyngjusandur Sandsheet, Iceland, UAV, field data, All tags... field methods, geoscientificInformation, image analysis, photogrammetry, structure from motion, ventifact, wind, Fewer tags