Students in a free genealogy class at a Sacramento, California library used historic fire insurance maps to walk through their community's 19th-century history without leaving the classroom, according to this story in the Sacramento Bee.
Instructor Melinda Kashuba said these maps are "obscure resource that can let a person's mind wander down the streets of their forebears," and that researchers can learn a lot about the lives of their ancestors.
Here's an example, above left; for the larger image, see below.
These maps indicate schools, churches, businesses and more. All provide additional leads for researchers, according to Kashuba.
An 1898 map of North Bloomfield shows that the area between Main Street and a nearby creek was where Chinese workers lived.
A map of Truckee from the late 19th century said the area between a hillside and West Main Street was lined with "female boarding houses," or brothels, Kashuba said.
Mapmakers had noted that a brewery in Mokelumne Hill was lit by candles and had no night watchman, making it a poor insurance risk, she said.
What makes me even happier - in addition to teaching beginners how to use these maps - is that the class was part of the library's free genealogy program. Future classes will focus on finding New England ancestors and researching church records
The fire insurance maps - a main publisher was the Sanborn Map Co. (Pelham, New York) - were printed 1860-1940, and provided insurance companies data to determine fire risks of buildings and neighborhoods, without having to send an underwriter on a personal visit. The maps were the equivalent of today's Google views.