My first thought is for historical research. It would be quite a bit of help if you have some old town or settlement map that you can compare to/overlay with a LiDAR stone wall map.
I am not sure, but it may also serve historical preservation purposes if that is an issue, e.g., if administrators are deciding on land partitioning and/or development plans.
That's what I was thinking too. The historical aspect is useful. And I would imagine the position of the walls could be correlated with past land ownership boundaries.
I am not sure, but it may also serve historical preservation purposes if that is an issue, e.g., if administrators are deciding on land partitioning and/or development plans.