I wonder if that's not a typo for "40 feet" contours... https://pubs.usgs.gov/of/2001/0311/pdf/cuc_map.pdf --Robert Angela R Cope wrote: > > > > > ------------------------------------------------------------------------ > *From:* Diaz, Tony A. <[log in to unmask]> > *Sent:* Wednesday, October 19, 2016 11:21 AM > *To:* 'Maps-L: Map Librarians, etc.' > *Subject:* 4 ft contour maps? > > Does anyone know of local topo maps with 4 ft contour intervals? > Specifically, I'm looking for info on the area within the Cucamonga > Peak (CA) 7.5' Quad. I came across an uncited reference to such a map, > but I can't find anything. > > > Tony Diaz > > caltech >