UAV-based NDVI data of four Arctic tundra environments (Abisko region) at summer vegetation peak for 2018 and 2019 ...

• Main Author: Siewert, Matthias Benjamin
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Abisko; Arctic; NDVI; UAV; Area/locality; Binary Object; Multiple investigations; Torneträsk; Fennoscandian; Northern Sweden; Tundra
• Online Access: https://dx.doi.org/10.1594/pangaea.938052; https://doi.pangaea.de/10.1594/PANGAEA.938052

Unmanned Aerial Vehicle (UAV) data were collected using an eBee fixed-wing mapping drone (senseFly, Switzerland) with a Sequoia multi-spectral (Parrot, France) camera sensor at four study areas in the Torneträsk region, northern Sweden. The areas have an extent of 15–21 ha (~350 m × ~500 m). The setup covers at large the climatic variability of the Fennoscandian forest-tundra ecotone. The imagery was recorded during vegetation peak productivity between July 27th and August 4th in 2018 and 2019. The Sequoia sensor provides imagery in green, red, red-edge and near-infrared bands (G,R,RE,NIR). The normalized difference vegetation index (NDVI) was extracted using the R and NIR bands. Overexposed snow areas were gap-filled following Siewert and Olofsson (2020). Radiometric calibration was performed using spectral reflectance panels (MosaicMill, Finland). The imagery has a ground resolution of 11.4 cm–13.5 cm depending on flight and area after photogrammetric processing using Pix4Dmapper (Pix4D SA, Switzerland). ...