I took the network of Roman roads used in this map from the shapefile provided by the Ancient World Mapping Center. I’ve created a zip file of the files needed for those who, like me, don’t know much about shapefiles.
I started with this KML of a tour route along Hadrian’s Wall and used Google Earth to remove the tourist sites, leaving my own KML with just the route of the wall itself. I then used a spreadsheet for the forts.
Cities, Civitates & Kingdoms
The other elements on the map I placed with spreadsheets: