In 1995, the firm first untangled the US interstates into a polar coordinate system centered on New York for its “Finding Yourself in Pittsburgh” atlas.
East of the Mississippi Map
As part of a long-term project to remap the entire country, the firm has completed an untangled map of state and national highways east of the Mississippi at a 1:4,600,000 scale (equivalent to the Google Maps zoom level 7, with the 50 mile scale marker). As part of this national mapping, it has also created larger scale maps for many major cities (Google zoom level 12 and higher).