@unpublished{TUW-279064, author = {Navratil, Gerhard}, title = {Geographical Data through Augmented Reality Technology: Discussion on Possibilities, Challenges, and Research Demand}, year = {2019}, keywords = {Augmented Reality, Mixed Reality, Technology, Research Questions}, note = {invited; talk: Symposium GIS Ostrava 2019, Ostrava; 2019-03-20 -- 2019-03-22} }