Around 85,000 images are available for viewing using a standard Internet browser. No additional plug-in software is required to view the maps and although the site will work at any screen resolution, they recommend a minimum of 1024x768. The maps are dated between 1846 and 1899, and are of 1:10,560 scale. Since the map sheets are larger than the viewable area on your screen, you will need to pan around the sheet using your browser scrollbars in order to see the entire map.
The site will open with a page similar to the screen-grab below. Use the search box in the top left corner to locate specific maps. Click on this image now to open the old-maps website in a new window.