Building our atlas
. . . having been accustomed to amuse himself with those Maps which are cut into several Compartments . . . that they may be put together again with an exact Coincidence of all their Angles and Bearings so as to form a perfect Whole.
William Cowper to Rev. William Unwin (7 September 1780)
software allows us to provide high resolution images without you having to download multi-megabyte files. The high resolution files are sliced into thousands of squares to build a Deep Zoom image pyramid. These are then displayed using Microsoft's Seadragon software.