Gerhard Navratil is a surveyor by education and specialized on cadastral topics. He participated in several projects related to cadastral issues including a mapping project in Cyprus in 2001/02, the EU funded COST action G9 (Modelling Real Property Transactions) from 2001 to 2005 and the appear project EduLand2 with partners in Ethiopia from 2016 to 2020. Proper cadastral systems require “good” data. Thus, determination, description, and visualization of spatial data quality play an essential role in his research. Since cadastral systems include documentation of rights, he is also dealing with legal questions. He is a member of the FIG Working Group on 3D cadastres and is co-chairing the ISPRS WG IV/3 Spatial Data Analysis, Statistics and Uncertainty Modelling. Gerhard Navratil is also at the University of Applied Science Technikum Wien. This triggered his interest in research questions related to transportation like optimal routes based on weather forecast, spatial variation of fastest routes, or identifying possibilities to use public transportation for leisure activities.