ISPRS-Archives ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ISPRS-Archives Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci. 2194-9034 Copernicus Publications Göttingen, Germany 10.5194/isprs-archives-XLII-4-W14-135-2019 VISUALIZATION OF BIG GEODATA: AN EXPERIMENT WITH DINSAR DEFORMATION TIME SERIES Kilsedar C. E. 1 Frigerio L. 2 Bonano M. 2 3 https://orcid.org/0000-0001-8240-7629 Bordogna G. 2 https://orcid.org/0000-0002-6775-753X Carrara P. 2 Imperatore P. 2 Lanari R. 2 https://orcid.org/0000-0002-7296-2749 Manzo M. 2 Pepe A. 2 https://orcid.org/0000-0002-7843-3565 Brovelli M. A. 1 Politecnico di Milano, Department of Civil and Environmental Engineering, Piazza Leonardo da Vinci 32, 20133 Milan, Italy CNR Institute for the Electromagnetic Sensing of the Environment (IREA), Diocleziano 328, 80124 Naples, Italy CNR Institute of Methodologies for Environmental Analysis (IMAA), C. da S. Loya, 85050 Tito Scalo, Potenza, Italy 23 08 2019 XLII-4/W14 135 141 Copyright: © 2019 C. E. Kilsedar et al. 2019 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://isprs-archives.copernicus.org/articles/isprs-archives-XLII-4-W14-135-2019.html The full text article is available as a PDF file from https://isprs-archives.copernicus.org/articles/isprs-archives-XLII-4-W14-135-2019.pdf

This paper describes an experiment carried out within the project “URBAN GEOmatics for Bulk data Generation, Data Assessment and Technology Awareness (URBAN GEO BIG DATA)” on novel technological solutions for encouraging the use of time series of big geodata by scientists, public administrators, and the citizens of urban areas. In this experiment, we focus on fostering the use of ground deformation time series derived through the Differential Synthetic Aperture Radar Interferometry (DInSAR) measurements in urban areas (i.e., Naples, Milan, and Turin) through visualization. Two visualization applications are developed within the project. First, mean deformation velocity maps are visualized; second, the cumulative deformation time series is animated to enable the comprehension of deformation of eighteen years at a glance. The experiment allows experts and non-experts to discover spatio-temporal patterns of deformation. The paper focuses on the characteristics and implementation details of this experiment. Both visualizations are overlaid on a three-dimensional map, i.e., a virtual globe. We use open standards and free and open source software (FOSS) for Web to enable interoperability, replicability, and reusability.