These historical fire insurance maps were originally created by the Sanborn Map Company, and provided here via the Library of Congress collection.
In early 2022, participants in a crowdsourcing project georeferenced all of the Louisiana maps you see here, eventually creating these seamless mosaic overlays. These comprise 1,500 individual sheets from 270 different Sanborn atlases, covering of over 130 different locations.
If you are interested in supporting this site get in touch. To get more Sanborn maps on here, please fill out this form.
To learn much more about the entire project, head to ohmg.dev.