-------- Original Message -------- Subject: Re: Plat maps Date: Fri, 12 Dec 2003 12:21:15 -0500 From: Susan A. Hawkins <[log in to unmask]> ------------------ Hello all, Here is the response I got (just) right from Sanborn: Sue, The answer is that the date on the map is the Survey date (usually has a month as well as a year). This means that the date reflects what was there up to that date (the survey will take from a week to several months depending on the town or city). If you have any other questions, please give me a call. Chris Chris Genovese Sanborn Map Company, Inc. 629 Fifth Avenue Pelham, New York 10803 1-800-511-0073 x218 E-Mail: mailto:[log in to unmask] http://www.sanborn.com/ At 03:55 PM 11/24/03, you wrote: >-------- Original Message -------- >Subject: Plat maps >Date: Mon, 24 Nov 2003 11:27:33 EST >From: <[log in to unmask]> > > >------------------ >I work in a local history collection (District of Columbia) that >contains plat maps (e.g., published by Baist or Sanborn). These maps >were published approximately every 5-10 years for certain sections of >the city, and are one of the collection's most prized and frequently >used resources. > >Occasionally, a patron will ask about the publishers' methodology: did >the surveyors collect information during the course of one year--the >year of publication--or were the data collected over a number of years? >For example, does the 1909 map reflect what was on the ground for 1909, >or might it show what was actually there in 1907? > >Also, is there any consensus about the accuracy of one group of maps >over another? Are the Sanborn maps considered more accurate on the whole? > >Any advice or information about these maps would be most appreciated. > > >Margaret Goodbody >Collections Librarian >Washingtoniana Division, Rm. 307 >MLK Library >901 G Street, NW >Washington, D.C 20001 Susan A. Hawkins National Aerial Resources 37 Avenue D Saratoga Springs, NY 12866 V: 800-827-2994 F: 518-581-0805 http://www.nar.com ...insight through aerial photography