TraVis – A visualization and analysis framework for mobile transect measurements
A project by Dr.-Ing. Kathrin Häb.
In urban climate research, mobile transect measurements are a common technique to investigate the variability of observed attributes at a study site. A vehicle equipped with various sensors is moved along a certain route of interest to investigate the impact of different urban form on the atmosphere surrounding it. The data sets stemming from such measurement campaigns are usually multivariate, time-varying, spatially dependent and require a thorough analysis. In collaboration with Prof. Dr. Ariane Middel and Prof. Dr. Benjamin L. Ruddell, microclimate researchers at the Arizona State University, USA, a software is developed that is specifically designed to facilitate reasoning about the complex relationships between the built environment with its various designs and the microclimate it induces.
The picture shows the graphical user interface (GUI) of the prototype. The spatial distribution of surface temperature (bottom), relative humidity (1m and 2m height, blue ribbons) and air temperature (1m and 2m height, light orange ribbons) along a transect route in Gilbert, Arizona, USA, are visualized on a map. The data has been classified according to similar multivariate relationships (topmost layer and parallel coordinates plot at the bottom of the GUI). Additionally, a user can slide through the traverse to look at the land cover that is “seen” by a sensor. In the shown example, the pie-chart and the fraction plot right underneath the map show the land cover classes that might be responsible for the sampled surface temperatures.