Dating road maps
Arrow Map Incorporated Automobile Club of Southern California Buddhist Calendar Dates California State Automobile Association Clason Road Maps Diversified Maps General Drafting Company George F.Cram Company Geographers A-Z Map Company Geographia H. Gousha Company Hagstrom Map Company Midwest Map Company National Automobile Club (San Francisco) Novo Print USA, Inc.A systematic review of the maps contained in Clason state road maps, touring atlases, and Green Guides reveal that the road legends and other map symbols varied over the years in systematic ways.
Map codes are in very small numbers and letters and are located on the bottom line of each map.The code will contain four, five or six digits, depending on the month and date.The codes are generally publication dates jumbled in a certain, consistent way that are often preceded by the letter C, although this is not always the case.Collectors of Clason state road maps issued between 19 are presented with challenges around determining map publication dates.Unlike Rand Mc Nally and Gousha, the Clason Map Company typically did not place dates or date codes on its products during this period.
The exception is the Ordnance Survey, who always dated their maps as far as I have seen, sometimes with a plethora of revision dates, so they are always easy to date (unless someone has cropped off the margins too closely). 1841 15 North Bridge as well 1842-57 22 Nidry Street & 38 North Bridge, Edinburgh 1857-78 6 & 13 George Street, Edinburgh .