Long Beach, CA - a recently filed RS I came across shows a found C-Nail (No Referenece), 0.03' easterly of a street intersection being established by intersection holding straight lines from monuments found in each cardinal direction.
The monument to the east is a found brass disk in well per city field notes, same with the monument to the west - no problem there, both of these are held for the east / west direction.
The monument to the north is a found spike and washer also called for in city field notes. This monument was held for the segment north of the intersection in question.
To the south, the surveyor found a C-Nail, No Reference (meaning not called for on any record document - map, tie note, county field note, etc.). He notes as follows, "Found C-Nail, No Reference, bent, held shaft of C-Nail." He held this point as a point on the north / south centerline.
Another thing is he shows a measured distance from the westerly brass disk monument to the established intersection point being different from record by 0.10 smaller.
So if the First C-Nail was held his measured would be closer to record by 0.03'.
I totally understand that if I found a No Reference C-nail I would check the next closest intersections to see how it worked, but to go to the next intersection and hold a bent C-Nail over one that is straight in and call the straight one off 0.03' sounds crazy to me?
Of course it's all about 0.03' so it doesn't really matter one way or another, but would any of you give greater creedence to the bent nail over the straight one?
Equal value.
> Of course it's all about 0.03' so it doesn't really matter one way or another, but would any of you give greater creedence to the bent nail over the straight one?
Maybe.
How long are these lines Ryan?
I would do some survey work to check the accuracy of the bent nail first. If that can't be done then I would accept the straight nail over a bent nail. Hey that is just me.
I don't know what's going through their head. Why would they think there has to be a straight line from the southerly bent nail to the spike & washer to the North with no angle point at the straight nail intx? Is there any reason for that that I'm not understanding? It's not about holding the straight one v. the bent one to me. Why not hold both of them?
An old boss would say "2 points make a straight line, a third one puts a bend in it".
😉
Cheers
Radar
Steven
>Why would they think there has to be a straight line from the southerly bent nail to the spike & washer to the North with no angle point at the straight nail intx?
I was thinking the same thing.
Steven
> >Why would they think there has to be a straight line from the southerly bent nail to the spike & washer to the North with no angle point at the straight nail intx?
>
> I was thinking the same thing.
Exactly. In fact after I found the Brass disks and checked my measured against the record within 0.07' to the straight C-nail, I probably would not have even gone to the south. This intersection was then used to determine a block corner by offsetting the street CL's and then to prorate in a lot boundary.
I can't remember how long they were. I think whatever a standard block in Long Beach is (660 NS x 330 EW ???).
I'd have broke the line at the middle nail, or adjusted to it, but not showed it off line 0.03', that's just silly.
> I can't remember how long they were. I think whatever a standard block in Long Beach is (660 NS x 330 EW ???).
0.03' is not unlikely if the heat shimmer is bad. That CN may just be right on line.
> I'd have broke the line at the middle nail, or adjusted to it, but not showed it off line 0.03', that's just silly.
It's not silly. It's just how it is. If you do not want to report a marker off line and it is off line, then do not even make a call to it on your map.
Of course it does depend on what type of survey you are doing, and where.