--- Begin Forwarded Message --- >Date: Thu, 22 Oct 1998 15:59:52 -0400 (Eastern Daylight Time) >From: Mark Thomas <[log in to unmask]> >Subject: usgs topo dates I'm confused about the dates on the State "Map Lists" (the xeroxed black and white lists that have superseded the old brown USGS catalogs). The dates frequently don't seem connected with reality, and I can't seem to find any pattern. The List has some dates in brackets and this note at the top: "Photoinspected dates are in brackets and do not always match the dates on the printed maps. These photoinspected maps have not been modified and the printed editions are still current." What does this mean? Does it mean that the area has been photoinspected but the map *hasn't* been updated with the purple overprinting? It seems a funny way to say that it's been overprinted with the purple, because (to me) that counts as being modified. I need to know if I can safely reorder some topos for which we have editions in the 50s or 60s or 70s, but the bracketted date (or even the unbracketed date) on the List is 10 or 20 or 30 years newer. I'm afraid I'll be rudely surprised when, expecting a photorevision, we instead get the same maps that we already have. I can't seem to verify what's going on by checking our existing maps. I've found that for photorevised maps the date on the List sometimes matches the revision and sometimes the original date. More confusion: The published date listed on our map is frequently newer on the List by a few years. Sometimes, it seems, the List has the date shown in the fine print on the map as being the latest date the information was field checked. Sometimes, however, the publication date does matches the date on the List. Just what are the rules for the dates they put on these lists? thanks, Mark ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Mark Thomas / Public Documents & Maps / Perkins Library Duke University / Durham, NC 27708-0177 [log in to unmask] / voice: 919-660-5853 / FAX: 919-684-2855 The train ... traditional, yet environmentally sound. --Lisa Simpson --- End Forwarded Message ---