Near-infrared orthomosaic of Samoylov Island, Siberia, summer 2014 (854 MB) ...

• Main Authors: Boike, Julia, Veh, Georg, Stoof, Günter, Sachs, Torsten, Busse, Henning, Muster, Sina
• Format: Dataset
• Language: English
• Published: PANGAEA 2015
• Subjects: Aerial Photographs; Arctic Tundra; infrared imagery; island; Lake/Pond; river delta; Multiple investigations; Permafrost Research Periglacial Dynamics @ AWI AWI_PerDyn; Arctic; Island Lake; permafrost; Tundra; Siberia
• Online Access: https://dx.doi.org/10.1594/pangaea.845723; https://doi.pangaea.de/10.1594/PANGAEA.845723

High-resolution land cover mapping is needed in the heterogeneous arctic landscapes that change land surface parameters over a range of a few meters. Polygonal tundra on Samoylov Island features a network of dry polygonal rims interspersed with patches of wet tundra and polygon ponds. On August 08, 2014, high-resolution aerial images were acquired during a helicopter flight using a Nikon D200 in the near infra-red (NIR) range. The internal IR-filter was removed from the camera in a laboratory (LPD LLC, USA). The camera was fitted with a Schneider Kreuznach B+W IR-filter 093 to acquire images in the NIR range, above about 830 nm. Flight distances from the island's surface ranged from c. 400 m to c. 1700 m. In total, 212 images (Appendix A) were used for stereo photogrammetric processing using Agisoft Photoscan (V 1.1.6). The decisive criteria for image selection were the absence of clouds and the image sharpness. Hence, no pictures from the southeastern and southwestern part of the island met these criteria. ...