I'm working on this double proportion problem I found in American Surveyor magazine and I'm getting the correct easting but my northing is the incorrect. I'm not in a PLSS state so I rarely work with sections, but I am preparing for both the PS and PLS exams so any clarification on what I'm doing wrong will be very helpful. I'm getting C but the correct answer is A. Thanks.
Here is a link to the actual page if the image doesn't come through clearly: (Question 4)
http://archive.amerisurv.com/PDF/TheAmericanSurveyor-TestYourselfWithAnswers-March-April2004.pdf
Need a better picture. This one is too blurry to read the cornnuts. I tried everything in my photo programs to make a decent picture, but it would not clear up so that it is readable.
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Something is missing from that question. Do you know what it is?
Looking at the other questions there are other problems too. I can assure you NCEES does a better job writing questions than this.?ÿ
This is not a Double Proportion corner since it is a ?¬ corner and not a section corner and is a Single Proportion for reestablishment. I come up with C as the cornnuts?ÿ for the ?¬ corner to Sections 9 and 16.
wouldn't you dp the section corner then sp the quarter section corner?
Assuming the north-south section line is cardinal North and 80 chains plus 40 chains (GLO record) AND the east-west section line is cardinal east with given distances in chains (GLO record) I get answer A.
coordinates at the corner common to 8/9/16/17 are N19,926.667; E7,603.609.
?ÿ
@dave-karoly I got to thinking about this and I should have proportioned in the section corner first and then single proportioned in the ?¬ corner. Must be a sign Old Age is creeping up on me.
@dave-karoly?ÿ You didn't complete the problem. It asks for the ?¬ corner to Sectipns 9 & 16. I get the same cornuts as you for the section corner. I'll redo?ÿ my single proportion for the ?¬ corner tomorrow.
@charles-l-dowdell Thanks, I wasn't doing that but using this method gets me the correct answer!
Quick breakdown:
Northing of section corner 8,9,16 & 17 is 19926.67 so:
19926.67+(40.05/80.10)(19800.00-19926.67)=19,863.335
I was right there the entire time, I was caught up on using only the given original monuments.
Hopefully like one of the others suggested, if a problem like this is to come up for me on my exam its worded a little different and asking for just the section corner.
@aliquot Thanks for the reassurance, I really hope so. I'm just trying to do any questions I can find so I'm prepared for any senerio given to me.
I computed the answer in red.?ÿ I screwed up the first time and put all the corners on the east-west line in-line with the existing corners.?ÿ But that line will deflect at the double-proportioned section corner.?ÿ I'm guessing that's the the original poster in this thread got the easting correct, but the northing wrong.?ÿ Two steps - 2P the section corner, then 1P the quarter corner on that new line.
my post last night is confusing, it was late.
i did calculate my way to answer A but it's confusing how I posted the coordinates for the section corner at the end like that.
My calculation:
No bearings, no chains, no notes, no answer. I suppose you can "assume" all the elements that go into a calculation, but even for the N1/4 of Section 16 it's critical that you know at least if the north line of 16 is an even or odd chain length. That will effect the 1/4 location.
