I recently came into possession of 4 ridiculously hi-res maps of Los Angeles from the early 1900s. They were scanned from maps at USC and the detail is amazing, especially when trying to see how neighborhoods looked or what buildings were still a part of the neighborhood way back when. These photos are large, totaling over 1 gigabyte, so make sure you free up some space on your device before you download. 🙂
Here’s how close you can zoom into the image above. The resolution is yes, ridiculous.