Dear Friends,
I received an inquiry today from a engineer doing an environmental study around Hermosillo. He is looking for pre 1970s information " any historical topographic maps, geologic maps, aerial photographs, or land use maps for the Hermosillo area with a scale around 1:50,000.”
I can’t find anything older than 1975. Any ideas if anything exists prior to 1975?
Mark Walker
World Map Source / Mexico Maps
3920 Maricopa Drive
Santa Barbara CA 93110-1414
805-448-7273 mobile
805-687-1011 office