Selecting a city reveals the old map images; zooming in shows a color overlay over a modern map with street names and building outlines. A team of scholars at four universities took seven months ...

However, overlays can also be used to showcase alternate maps such as detailed topography or historical maps like we’ll show you today. The North Carolina Maps collection features an impressive ...

Have you ever used the “Image Overlay” feature of Google Earth? Perhaps, as one of my professors did a few years ago, you want to add an old German military map of Stalingrad over the current ...