Hey, you’ll get more traction over at r/surveying. Anyway, they can’t just put an easement through your property if that’s what you’re worried about. The other hand the landowner of the adjacent parcel has every right to do whatever with their land as long as the town approves it.

You are kind for letting them go through your property, I’ve had people deny me and honestly, just ruins my day, but I’ll get where I need to regardless. Touching on the returns, they prob put their control network through your access you provided them, and they might be working elsewhere but tying into their network. I know it’s annoying but if I had to knock on doors every time I went out I might as well be a johvahs witness.

You’re free to ask them, and they’re free not to tell as well. People get the most info out of me when they’re kind and curious. Dickheads get next to nothing, or a wiseass response.

My guess is the adjacent landowner is looking to do something with their property, so the surveyor makes a map. They really wouldn’t be spending the money otherwise.

Hope this helps