Acadia: not a Node Network, because the numbered poles have no pointers to adjacent numbered poles.
La Tierra: definitely a Node Network! With nothing more than a number strip you can follow your planned itinerary. This one could be mapped as a Node Network. Knooppuntnet Planner can then be used by recreants to plan their trip, then print the number strip or transfer the gpx to an app or device for convenient voice navigation.
Knooppuntnet Analyser can check and monitor the integrity of the network.
Note that you don’t have to know the exact geometry of the connections between the nodes. You will find the arrows on your way. Suppose there are no arrows, you would have to make your own way to the next Node. For that to work, you’ll need to be able to see the next Node.
PS My suggestion to a few route operators was to have a large anchored balloon, coloured like the route symbol, floating over the Node location. Think giant flying Pokéball. So far, noone has done that, can you believe it?