If your basis of bearing is (for example) grid north TSPCS SCZ and you have a found bearing of N 20 degrees E and show a called bearing of N 18 degrees E what are you saying. Do you mean the found bearing relative to all the other lines is 2 degrees different that the deed bearing are do you mean the original bearing was not related to grid north. I see surveys all the time with called and found bearings on each line that are just the difference in the bearing reference not a difference in the actual direction of the line on the ground. To me the called and found was not intended to show the difference between various bearing references but should be reserved to show a change (conflict) in a direction on the ground.
Welllllllll I kind of agree with you, but what about the dittsey little gal, down at the title co, that is simply REVIEWING the plak (plat) and simply sees a previous deed call of N20E, and you are showing N18E. All they need is a CONNECTION to the previous title. Now, the FACT that ALL the brgs are exactly (+ - the tolerance) same 2° off.... well except that THAT one down in the SE corner... well, it is ENOUGH info for the MORE savy title inspector to comprehend. So, it takes care of BOTH of them.
SO,
Showing OLD and NEW brgs is fine. It accomplishes BOTH purposes. IF you showed actual brg diff... well, then we could loose the CONNECTION to the old deed. (In the mind of the little gal)
IMHO
Nate
The confusion for me is the term "called" and "found". What does that mean? Did you call up a central data center and they told you what the bearing is? Found bearing? Where was it found and was it ever lost? I would prefer references to any bearing to be Record or Measured or other defined note. Record per deed book,page or record per plat with record reference or unrecorded plat per Joe Lousy Surveyor. Something besides "called" and "found".
Pablo
If at all possible I get on the record bearings. If I want to show a grid bearing or some other referenced basis of bearing I will show it with an angle on the north arrow. I will also cover it in detail in the Basis of Bearing note which is almost always Survey Notes, #1.
That is somewhat interesting to me in that the 2° you mention (whether hypothetical or not) is not uncommon between SPC and recitation of record here in the Houston area.
I've seen that enough times to make me wonder why the difference is 2° when you look at an isogonic chart we should realize approximately 5° +/-.
I've never surveyed by compass and variation of the needle is a curiosity at best.
> That is somewhat interesting to me in that the 2° you mention (whether hypothetical or not) is not uncommon between SPC and recitation of record here in the Houston area.
> I've seen that enough times to make me wonder why the difference is 2° when you look at an isogonic chart we should realize approximately 5° +/-.
> I've never surveyed by compass and variation of the needle is a curiosity at best.
Todays declination in the Houston area is 2.2 degrees.
Thanks. I was just looking at some old charts I suppose.
> > That is somewhat interesting to me in that the 2° you mention (whether hypothetical or not) is not uncommon between SPC and recitation of record here in the Houston area.
> > I've seen that enough times to make me wonder why the difference is 2° when you look at an isogonic chart we should realize approximately 5° +/-.
> > I've never surveyed by compass and variation of the needle is a curiosity at best.
>
> Todays declination in the Houston area is 2.2 degrees.
>
>> http://www.ngdc.noaa.gov/geomag-web/#declinationbr >
Remember that SPC Grid North is usually Geodetic North at the center of the SPC zone and convergence angle, however slight, increases as you get farther away from the central meridian of the zone. USGS quadrangle maps show Grid, Astronomic and Magnetic, at the center of the sheet, as of date of publication.
Working with older deeds I seldom find a statement of basis of bearing. I have encountered three adjoining properties calling for the same monuments and distances with each of the three having a different bearing for that line.
