The US National Archives filmed these census enumeration district maps (1900-1940) years ago and FamilySearch recently digitized them and made the available online. The maps are a wonderful resource for those with ancestors in the US during this era. The maps are available for urban areas as well.
This map contains "dots" for rural homes and schools. I probably never will get around to it, but it would be an interesting exercise to see how many of the "dots" I could identify, even if I had to have some help.
If your rural genealogical or historical society is looking for a project, consider taking the map for your area and working on identifying as many dots as you can being certain to indicate the name of the person who provided the information.
The maps are available on FamilySearch here.
