GIS-Based Roughness Derivation for Flood Simulations: A Comparison of Orthophotos, LiDAR and Crowdsourced Geodata. - Helen Dorn; Michael Vetter; Bernhard Höfle (Remote. Sens., 2014)

Quality Evaluation of VGI Using Authoritative Data - A Comparison with Land Use Data in Southern Germany. - Helen Dorn; Tobias Törnros; Alexander Zipf (ISPRS Int. J. Geo Inf., 2015)