Hello, Thank you all for your help so far. I downloaded tiger/line files, used tgr2shp to create shape files and then ran tile4ms on them. For each .shp file I get a line of output that says: Aborted. DBF fields do not match for file:. [name of .shp file] Is this a problem with tgr2shp, or any other idea what I'm doing wrong? John Bolster