When we digitize historical maps we create copies that can be shared and used by all. But we also create the potential to repurpose these copies to advance understanding of the original maps. To do this, we create composite maps, georeferenced maps, composite views, interactive globes, composite texts and other types of digital versions that expand map interpretation and enhance use. Below are some examples of these interpretive maps that we have created over the past 20 years. To date we have created 1,674 interpretive composite maps, views, and texts as well as over 56,000 georeferenced maps.
Click on any of the images below to view the interactive online version.
The 1914 Atlas of Egypt shows the entire Nile River in 165 sheets at a large scale of 1:50,000. We combined all 165 sheets, georeferenced them, and overlaid them on modern maps below to show changes.