Note from the Editor of the Electronic version.

The maps of the Classical Atlas have been scanned at a sufficient resolution to enable easy reading, but they may not display at an appropriate scale, depending on screen size, resolution, and window size; we recommend you use software that allows zooming to view them.

The numbers of the maps given in the Index pages are the same as those in the list in the main body of the Atlas, allowing cross-reference.

Note that the Latitude and Longitude given in the Index pages are from Greenwich, while the maps, as common with many of the times, have grids with Longitudes given both from Greenwich and Ferro. If you use the latter you won't find your target.