This volume contains the papers presented at the Conference on Spatial Inf- mationTheory, heldinEllicottville, NewYorkinSeptember 2005.COSIT2005 was the 7th International Conference held under the COSIT name. When - drewFrankandhiscolleaguesorganizedthe?rstCOSITconferenceontheisland of Elba, Italy, in 1993, it represented the maturing of an international research community that had already met four or ?ve times in the United States, Spain, and Italy. Of course, cognitive and computational approaches to space and s- tial phenomena werenot themselves new topics, but a contextof providingth-...