----------------------------Original message---------------------------- HELP!! We (New York Public Library) have a large number of the DMA 1:50,000 maps. We have many older editions and many newer ones too. How do you index these so they are accessable? The numbering system makes no sense and seems to start over at various points in the county. The sheet index is rather confusing and the list on the back is not easy to use quickly. Is there a simple solution? Also, what use are these maps? The 1:24,000 have better detail--who and in what circumstances would want to use these maps, other than the people at DMA? Thanks, Christopher Thiry [log in to unmask]