Many cities and counties have had their own topo and planimetric maps made.  I have frequently seen contour levels down to one or two feet on the old ones.  In Minnesota, the maps are frequently done as ½, ¼, or 1/8 section.  Those are old fashioned now, as the up to date cities are working with Lidar data.

________________________________
   [Description: cid:image001.png@01CD70F3.D84978F0]    limiting liability with relevant environmental research

David Hodnefield, President
Historical Information Gatherers

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From: Maps-L: Map Librarians, etc. [mailto:[log in to unmask]] On Behalf Of Angela R Cope
Sent: Wednesday, October 19, 2016 11:42 AM
To: [log in to unmask]
Subject: 4 ft contour maps?




________________________________
From: Diaz, Tony A. <[log in to unmask]<mailto:[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