@unpublished{TUW-120004, author = {Kraus, Karl and Karel, Wilfried}, title = {Quality Parameters of DTMs}, year = {2005}, note = {invited; talk: EuroSDR, Seminar on ''Automated Quality Control of Digital Terrain Models'', Aalborg, D{\"a}nemark; 2005-08-18 -- 2005-08-19} }