Every good builder likes to ensure he/she has their area locked down or has enough room to build what they need. Though sometimes every now and then they miss something. Leaving a hole or mistaking where the edge of the claimed land actually is allowing would be raiders or trolls to exploit this weakness.
Suggestion: add new function to repair hammer. Equip repair hammer to see a discolored area (green for your clan red for others) that indicates claimed land.
PvP: This feature would permit players to now see the holes in their build or ensure they have claimed enough land from their walls to keep trebuchets from being functional.
RP/PvE: this feature would help builders from different clans see exactly how much room they have to work with when building next to one another. It helps to see where passages have been claimed to prevent trolls from blocking off. Every PvE builder of note plans out their build. And thus has an idea of how much room they need, when building in a populated area this tool can help them find the perfect building location.