3D City Models and urban information: Current issues and perspectives - European COST Action TU0801 R. Billen, A.-F. Cutting-Decelle, O. Marina, J.-P. de Almeida, Caglioni M., G. Falquet, T. Leduc, C. Métral, G. Moreau, J. Perret et al. (4 more) Published online: 28 January 2014 DOI: 10.1051/TU0801/201400001