UNDERSTANDING URBAN DYNAMICS THE USE OF VECTOR TOPOGRAPHIC DATABASES AND THE CREATION OF SPATIO-TEMPORAL DATABASES Julien Perret 1 Anne Ruas 1 Annabelle Boffet Mas 2 1 Laboratoire COGIT, IGN, France 2 University of Orl ´ eans, France November 20, 2009 24 th International Cartography Conference, Santiago, Chile