If you are still looking for maps,
The Official Military Atlas of the Civil War is the mother load.
View attachment 578446
Lady Spitfire, This collection of books about the Tullahoma Campaign will give you an idea of the scale of the maps in the Official Atlas. The pink Postits correspond with pages in the other books.
The cartography unit of the Army of the Cumberland was arguably the most advanced in the world at that time. Sherman added it to his staff for the Atlanta Campaign. The granular nature of the data on the maps is quite impressive. The names owners & locations of houses are a boon to researchers such as yourself.
View attachment 578447
This is a detail of the approaches to Shelbyville TN from a previous CWT post. As you can see, springs, mills & geographical features are included.
I have no idea what you are pursuing, however, knowing the names of close neighbors who might be relations can come in handy.
Sherman's map of Georgia that was absolutely essential for the Atlanta Campaign was only issued to Corps commanders. It was a closely guarded secret. For example, the road that Sherman ordered the advance against Rocky Face Ridge was not on Johnston's map.
View attachment 578452
In the fine print below the legend is an order for officers to note information onto maps & return them to Capt. Merrill's unit. The new information was correlated & included in the next edition. During the advance on Chattanooga (+/-) 20,000 three color maps were issued using a solar copying machine.
Very few of those maps exist. This one is valued at over $14,000. See it here.
Link:
Early Photography & Battlefield Mapmaking Technology!Produced behind the lines using a revolutionary mobile darkroom, providing Union commanders with near real-time topographical intelligence.Prep...
raremaps.com
Can you imagine the notoriously impatient Sherman calmly "… wait[ing] five days so that Sgt. Finegan & his motley crew can finish their work…"? The extreme accuracy of the maps was used during the Atlanta Campaign were in part, due to an artist / architect from Ohio. Finegan & his motley crew that included itinerant preachers, peddlers & drovers, sought out local knowledge. Anybody coming through the lines from Georgia could find themselves having a casual but highly focused chat with some improbable individuals.
The Official Military Atlas is available online used for modest sums. It is a resource that everyone who has an interest in the Civil War should have at hand.