After a great deal of abortive experimentation, some success now with training
#ilastik AI software (developed for medical imaging) to recognise roads on old 6" #GB1900
Ordnance Survey maps. It's even starting to spot roads and paths marked with dashed lines...

Old #WindMills on #Anglesey: using the place name data from old #OrdnanceSurvey maps collected by #GB1900 to add things (windmills) to #OpenStreetMap

https://www.openstreetmap.org/user/SK53/diary/401114

Images from : https://commons.wikimedia.org/wiki/Category:Windmills_in_Anglesey