Matrix Games Forums

Not sure if this has been posted before. It's topozone. If you scroll down you'll see a map of the U.S. where you can click on a state and get a zoomable topo map. It covers the entire U.S. Would be a good source for terrain details for Civil War maps. https://www.topozone.com/

https://opentopomap.org/ is a useful resource as well.

Cheers

Do they have lat/long tools?