Imaging of Titan in the infrared with Cassini/VIMS : Toward homogeneous surface maps

(1) Laboratoire de Planetologie et Geodynamique, CNRS UMR-6112, Universite de Nantes, Nantes cedex 3, France, (2) Laboratoire AIM, Universite Paris 7, CNRS UMR-7158, CEA-Saclay/DSM/IRFU/SAp, France, (3) Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA, (4) University of Idaho, USA, (5) Lunar and Planetary Lab and Stewart Observatory, University of Arizona, Tucson, USA, (6) USGS, Denver, USA, (7) Cornell University, Astronomy Department, Ithaca, NY, USA.