@unpublished{TUW-173815, author = {Ressl, Camillo}, title = {Digitale Orthophotos - Grundlagen f{\"u}r die Praxis}, year = {2009}, note = {invited; talk: 3DGeo 2009 - Geoconvent f{\"u}r r{\"a}umliche Informationsnutzung, Workshop ''Geodaten - Grundlagen f{\"u}r die Praxis'', Baden; 2009-01-28} }