@unpublished{TUW-200102, author = {Mandlburger, Gottfried}, title = {3D Remote Sensing Sensors - Mapping the Earth in 3D}, year = {2011}, note = {invited; talk: Hengstberger Symposium ''Towards Digital Earth - 3D Spatial Data Infrastructures'', Heidelberg; 2011-09-07 -- 2011-09-08} }