2 messages.---------------------------------Johnnie ---------------------------------------------------- >From: "Maura O'Connor" <[log in to unmask]> >Subject: RE: aerial photography storage >Date: Sat, 15 Feb 1997 13:46:40 +1100 Rich Why not treat them as maps and store them flat in map drawers. Use mylar pockets or the encapsulating material you have used (what is it ?) and/or use acid free jacketing material. If you turn them on their side and use half size jackets you should fit between 50 - 100 in each standard map drawer. I have a large set of Trobriand Island orthophotomaps which posed a similar problem. Larger than a map drawer I nevertheless used the same principles suggested above and had an acid free box made to sit flat on top of a map cabinet for them. Yours sincerely Maura O'Connor Map Curator Information Services National Library of Australia >---------- >From: Rich Boardman[SMTP:[log in to unmask]] >Sent: Saturday 15 February 1997 8:22AM >To: Multiple recipients of list MAPS-L >Subject: aerial photography storage > >----------------------------Original message---------------------------- >The Map Collection at the Free Library of Philadelphia has a growing >collection of regional aerial photographs. They are larger than most, >measuring approx. 2.5'x 2'. I've had them encapsulated with a large >end strip for possible binding. I've gotten an estimate for building >a storage facilitiy and for custom binders and it's expensive. >Any thoughts out there on alternative stoage methods for some this >big? At this point there are over 1,000 photos. What have other >locations done? Thanks for any suggestions. > >Rich Boardman >Map Collection-Free Library of Philadelphia > -------------------------------------------------------------------- >Date: Fri, 14 Feb 97 18:18:29 EST >From: Helen Armstrong <[log in to unmask]> >Subject: Aerial Photograph Storage The University of Florida is the repository for the USDA FSA (old ASCS) archival photos for the State of Florida. The only other collection is located in the National Archives. This means we have 300,000 photos and about a fourth of them are enlargements. We have stored these in flat mapcases approx. 55" X 45" We purchased Hamilton cases because we usually can put two piles next to each other in one drawer. However, the 36" X 36" enlargements as well as the large satellite images can only be filed in one pile. We purchased the mapcases with the cloth compressors so that the archival materials are protected from the elements while being held in place. These cases are not open to the public. All but the current photos are filed in mapcases which are on electronic moveable compact shelving bases which are not located within the Map & Imag. Lib. reading room. The current flights are located within the reading room but are in locked mapcases. The aerial mosaic indexes appox 24" X 24" are filed separately in 10 drawer cases about 4 feet high which have approx. 4"h. per drawer. The units are metal and were designed as museum storage files. They are located in our reading room and accessible to the public. These are very activity used cases and have withstood rough handling for over 25 years. If I had to replace these index files I would start by contacting our State of Florida Natural History Museum for their equipment catalogs. Since Hamilton is no longer making mapcases, I am not sure that there are any comparable mapcases which are sturdy enough for the weight while having the needed preservation features. We did not consider filing the enlargements in binders because of negative experiences I had working with such an arrangement when I was doing my PhD research. What I wanted to see was never on one photograph. Trying to mosaic these togather was a problem as the curator did not want to remove any of the photos from the binder. After winning this arguement, I discovered that the added binding strip obscured some information. Also the strip would not allow me to make a moasic of the photos by overlapping the photos. The last factor was the sheer weight of a binder of enlarged photographs. It was difficult for the patron to use and the binders with encapsulated photos were even more difficult. This lead to the photos often being stored outside the binder for long periods of time in unsecured areas where damage occurred to even the encapsalated photos. As you noted this is an expensive undertaking. This is why the photo col- lection I was using was not entirely encapsulated. The mapcases are also expensive so a careful cost analysis will be needed. Univ. of Fla. will have to increase our aerial photograph storage in the next few years. I will be very interested to see what suggestions you receive. Good Luck. HelenJane Armstrong, Head University of Florida Map & Imagery Library.