Road atlas maps should be good enough provided they cover the back roads. Collins maps have served me very well in the UK with occasional print outs from google maps of town centres to help aviod having to roll into town on huge dual carriageways.
France has an equivalent of OS, which is the IGN and they do specific cycling maps (wide coverage, good topography and geography) although I don't think they do full national coverage. Best to head to Stamfords and have a root around. Holland is really well marked and often you will have to stick to cycle routes, even where roads are close and a bit quicker. The upside is that routes are incredibly well signed so navigation against a road map should be pretty easy. I've only done the North Sea Route in Belgium but it's small and well signed so shouldn't be a big challenge navigationally.
Road atlas maps should be good enough provided they cover the back roads. Collins maps have served me very well in the UK with occasional print outs from google maps of town centres to help aviod having to roll into town on huge dual carriageways.
France has an equivalent of OS, which is the IGN and they do specific cycling maps (wide coverage, good topography and geography) although I don't think they do full national coverage. Best to head to Stamfords and have a root around. Holland is really well marked and often you will have to stick to cycle routes, even where roads are close and a bit quicker. The upside is that routes are incredibly well signed so navigation against a road map should be pretty easy. I've only done the North Sea Route in Belgium but it's small and well signed so shouldn't be a big challenge navigationally.