Another fun homebrew map! As these are becoming more and more common I figured I'd lay out some of the process. The client usually provides a copy of their map, usually from one of the free cartography websites or photos of a handdrawn map. From that I build a draft (sort of like a blueprint for the leather map). Occasionally I'm able to hand draw my own version of the map as part of the drafting process but that takes several hours so I'm not able to do it all the time.
Once it's carved I do the staining (more arcane craftsmenship) and when that's all cured it gets stitched down to some 1/4" MDF to keep it flat and sturdy. The whole process could probably be done in 3-4 days at the absolute fastest but since I'm usually juggling multiple orders most maps ship within 1-2 weeks of purchase.