@unpublished{TUW-279063, author = {Navratil, Gerhard}, title = {Smart Cities require 3D Information - A Case for a 3D Cadastre}, year = {2019}, keywords = {Smart City, Cadastre, 3D, Nixed Reality, Augmented Reality}, note = {invited; talk: Symposium GIS Ostrava 2019, Ostrava; 2019-03-20 -- 2019-03-22} }