Hi Bernard, I don’t know in regards to the Right of Way. 
At the NE end, I’ve just seen that I extended the boardwalk a bit far. I’ll remedy that now. Basically at that end, the existing footpath just runs along the beach and the boardwalk ends just before the beach starts.

At the SW end it would be quite hard to pin point exactly where the boardwalk ends as it is relatively random. I suppose it kind of takes the place of the footpath (the whole point of the boardwalk is that the footpath along there regularly floods)
It is also worth noting that there is a new fence running parallel to the boardwalk but it only goes halfway before turning up the field, splitting the field in two. Basically it would be very hard to accurately place both the new boardwalk and a few other features (including the fence), without updated satellite imagery.

