PANGAEA_996057 Drone-based ice station orthomosaics in local coordinate systems from the PS149/CONTRASTS expedition in the Arctic Ocean Blei, Torben; Fuchs, Niels; Birnbaum, Gerit; Neckel, Niklas Drone-based ice station orthomosaics in local coordinate systems from the PS149/CONTRASTS expedition in the Arctic Ocean 2026-07-17 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.996057 Earth Science Event label LATITUDE LONGITUDE DATE/TIME Flight altitude Instrument Resolution Comment Raster graphic, GeoTIFF format Raster graphic, GeoTIFF format (File Size) geoscientificInformation Arctic DJI Mavic 3; equipped with a 4/3 CMOS Hasselblad camera; DJI Enterprise drone maps ice station maps local coordinate system orthomosaic PS149 PS149_13-1-Mavic3-01 PS149_16-1-M350-01 PS149_18-1-M350-01 PS149_21-1-M350-01 PS149_25-1-M350-01 PS149_30-1-M350-01 PS149_32-1-M350-01 PS149_36-1-M350-01 PS149_41-1-M350-01 PS149_46-1-Mavic3-01 PS149_47-1-M350-01 Unmanned Aerial Vehicle (UAV), DJI Technology Co, Matrice 350 RTK; coupled with Zenmuse L2 Lidar System, XT thermal sensor, optical Camera system, RTK base station Polarstern 2025-07-09 2025-08-27 Complete 82.38925 84.78032 -17.90193 33.73123 unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 59 data points text/tab-separated-values Nicolaus, Marcel (2026): The Expedition PS149 of the Research Vessel POLARSTERN to the Arctic Ocean in 2025. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 808, 382 pp, https://doi.org/10.57738/BZPM_0808_2026

This dataset consists of high-resolution airborne orthomosaics of the working areas surrounding the 11 ice stations visited during the PS149/CONTRASTS expedition in the Arctic Ocean between 2nd of July and 1st of September 2025. Mentioned ice stations are comprised of a visit to one of three floes. These floes were located in first-, second-, or multi-year ice respectively. The orthomosaics were generated through photogrammetric processing of airborne RGB imagery using Agisoft Metashape. No brightness corrections were applied. The imagery was acquired during drone surveys conducted in a chessboard-like flight pattern using a DJI Matrice 350 RTK equipped with a DJI Zenmuse H20T camera. A DJI Mavic 3 was used exclusively during the fourth visit to ice station 2 (2d) due to adverse weather conditions. The chessboard-like survey pattern generally consisted of at least two image blocks flown at different altitudes. The first visit to ice station 2 (2a) represents an exception, with observations restricted to a single altitude. Survey parameters, including flight altitude, speed, and image overlap, varied depending on weather conditions and floe drift speed. The orthomosaics are referenced in local coordinate systems defined by black-and-white ground targets deployed on the ice and, where possible, scaled using tachymeter measurements. These coordinate systems were maintained as consistently as possible throughout repeated visits to the ice stations. For surveys in which no ground targets were deployed, target locations were approximated based on their positions during previous visits. Orthomosaics generated under these conditions are marked accordingly. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.996057"!

http://en.wikipedia.org/wiki/ISO_6709 LATITUDE http://en.wikipedia.org/wiki/ISO_6709 LONGITUDE http://en.wikipedia.org/wiki/ISO_8601 DATE/TIME https://doi.org/10.17815/jlsrf-3-163 Polarstern https://doi.org/10.57738/BZPM_0808_2026 The Expedition PS149 of the Research Vessel POLARSTERN to the Arctic Ocean in 2025 DIF 9.4 2026-07-17 2026-07-17