If you have any interest at all in historical San Francisco, or if you — like me — have ancestors who lived there, this is worth checking out! 

https://www.davidrumsey.com/blog/2019/1/1/huge-san-francisco-1940-wooden-model-digitized

It can be viewed via Google Earth, Luna, and other tools — links available at the David Rumsey website above.  

Bay Area historian Gary Brechin has been a lead player in seeing that the model — originally used for city planning — be preserved and restored.