----------------------------Original message---------------------------- We are doing work on the visualization of flows within an exploratory data analysis context. All is written in X-Windows. Does beautiful maps of point to point flows (e.g. migration) but hard copy escapes us due to budget difficulties! -- Duane F. Marble E-mail: [log in to unmask] Dept. of Geography The Ohio State University Telephone: (614) 292-2250 Columbus, OH 43220 Fax: (614) 292-6213