1. a Christian Doppler Laboratory for ‘Spatial Data from Laser Scanning and Remote Sensing’ at the Institute of Photogrammetry and Remote Sensing , Vienna University of Technology, Gußhausstraße 27-29 , 1040, Vienna, Austria
2. b Institute of Photogrammetry and Remote Sensing, Vienna University of Technology, Gußhausstraße 27-29 , 1040, Vienna, Austria
3. c Department of Forest Inventory at the Federal Research and Training Centre for Forests , Natural Hazards and Landscape, Seckendorff-Gudent-Weg , 1130, Vienna, Austria
4. d Stand Montafon Forstfonds, Montafonerstraße 21 , 6780, Schruns, Austria