help a metes and bounds brother study for the big test. on pg 44 chapter 3 there is an instructuion such as "west on random, correct to true" does this mean traverse out close to true line, then compute corrections to stake to on your way back down the line? what does "west on random, return on same line" mean then? finally, on pg 48 there is "r&t" in fig 3-14. uh, regular and true? i don't know what this terminology means.
thanks, in advance, for not beating me down over it
> help a metes and bounds brother study for the big test. on pg 44 chapter 3 there is an instructuion such as "west on random, correct to true" does this mean traverse out close to true line, then compute corrections to stake to on your way back down the line? what does "west on random, return on same line" mean then? finally, on pg 48 there is "r&t" in fig 3-14. uh, regular and true? i don't know what this terminology means.
>
> thanks, in advance, for not beating me down over it
When the surveyor would do the tie to the east or west section corner, they would basically traverse on a random straight line over to the section corner. When they got to the section corner, they would measure how far away they were from the true corner. Make calculations to adjust the random line to a true line between the two section corners and set the 1/4 corner in the correct position. Basic priniciple here.
These instructions are for the original survey of the Public Land and the terminology simply means that a random line is run westerly, since the surveyor does not know yet where the corner is that he is running to; and after he gets there, has a falling (right angle distance) to the corner monument and then returns on the true line (corner monument to corner monument) with the calls as found, creeks, roads, line trees, etc.
At least that is the protocol for the official field notes of the survey.
Keith
thanks so much. sounds like surveyors have regional vernacular. for instance, i might 'wiggle in on line', but would 'buck in on elevation'.
Eddie! What test might this be? The CFeds program addresses these subjects in depth!! And it offers a significant amount of clarification to the manual, or "secret decoder rings" as they put it...
2009 BLM Manual - following the tangent
I always would "wiggle in" on line between two monuments and "buck-in" on a line of two monuments - extended.
When and why would you buck in on an elevation?
2009 BLM Manual - following the tangent
> I always would "wiggle in" on line between two monuments and "buck-in" on a line of two monuments - extended.
>
> When and why would you buck in on an elevation?""
my point exactly, its local vernacular.
in my commercial construction days, we would buck in on a 5 ft AFF mark and just put the pencil on the crosshairs to extend vertical control on walls and columns. eliminates the bs reading as a source of error.
wiggle in, conversely, was for getting coincident to a horizontal line, with a theodolite
trying for maryland principles and practice for october. trying to buckle down and study on a regular schedule
I think that R & T stands for: Random & True
2009 BLM Manual - following the tangent
I did get your point, I was just curious about bucking in on an elevation. I guess I was bucking in on a tangent. 😉 Thanks.
Another mind gone to PLSS waste 😉
Why would the BLM Manual be on the Maryland test?
Keith
Because the first six hours is a national exam.
I agree: Random and True.
Historically, the terms first seem to appear in the Instructions of 1815, in the directions about the subdivision of townships.
Section 3:
"The sections must be made to close, by running a random line from one corner to another except on the north and west ranges of sections, and the true line between them is to be established by offsets."
This applied mainly to the setting of quarter posts, which were first temporarily set until the mile line was closed out, and then run in reverse on the "true" line which was blazed back to the temporary quarter post which was "corrected" by applying half of the misclosure in line and distance, then blazed on back to the section corner, from which a line was run north to begin the next section.
The "random" line was not a traverse but a trial compass line run in the cardinal direction with the correction applied to the compass computed and supplied to the deputy surveyor by the surveyor general.
I will suggest that a random line has always been a line that was run toward the object section corner and probably at a cardinal direction, and then after the falling on the object corner was noted, the true line bearing and distance was known.
In practice, the line was not rerun on the true line.
Keith
> I will suggest that a random line has always been a line that was run toward the object section corner and probably at a cardinal direction, and then after the falling on the object corner was noted, the true line bearing and distance was known.
>
> In practice, the line was not rerun on the true line.
>
> Keith
Around here, it was solid forest in 1820 with few exceptions.
The "true" line would be blazed back to the ability and patience of the deputy surveyor, as instructed, and the line trees (frequently several) would be blazed and described in the notes. The temporary quarter post would be permanently monumented to the same standards as a section corner, and referenced to witness trees. All the transcriptions of the original notes I have retraced reflect this as the practice in the First Meridian Survey. Because if you didn't follow surveyor general Tiffin's instructions to the letter, you didn't get the three dollars for that mile!
Carl
I only wish that was always the procedure in practice!
Keith
