1 1 This manuscript has been submitted for publication in PFG – Journal of 2 Photogrammetry, Remote Sensing and Geoinformation Science. Please note 3 that, despite having undergone peer-review, the manuscript has yet to be 4 formally accepted for publication. Subsequent versions of this manuscript 5 may have slightly different content. If accepted, the final version of 6 this manuscript will be available via the ‘Peer-reviewed Publication DOI’ 7 link on the right-hand side of this webpage. Please feel free to contact 8 any of the authors; We welcome feedback. 9 10 Jayan Wijesingha*, Thomas Astor, Damian Schulze-Brüninghoff, Michael Wachendorf 11 Mapping invasive Lupinus polyphyllus Lindl. in 12 semi-natural grasslands using object-based analysis of 13 UAV-borne images 14 Grassland Science and Renewable Plant Resources, Universität Kassel, 15 Steinstraße 19, D-37213, Witzenhausen, Germany 16 jayan.wijesingha@uni-kassel.de (0000-0003-2574-6303), thastor@uni-kassel.de 17 (0000-0003-4608-955X), dam.schubrue@uni-kassel.de (0000-0001-8215-975X), 18 mwach@uni-kassel.de (0000-0002-2840-7086) 19 20 21 *Corresponding author: Jayan Wijesingha 22 Telephone: +49-561-804-1338 23 Mobile phone: +49-177-480-9784 24 Email: jayan.wijesingha@uni-kassel.de or gnr@uni-kassel.de 25