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| GeoCommunity Mailing List |
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| Subject: | Re: GISList: PLSS GIS |
| Date: |
01/17/2002 01:36:32 PM |
| From: |
Dawn Jones |
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If there are any surveyors on this list they will be able to
give you a better explanation. But this is my recollection:
After the section corners were monumented, the quarter section monuments were
set. The goal was to divide the north line into 2 equal segments by
setting the north
quarter corner at the center point: ditto the east, west and south quarter
corners.
Then the north quarter corner was connected to the south
quarter corner and the east quarter corner was connected to the west.
I think the subdivisions of quarter sections were done similarly. If the
section
is bounded by a river then the process is different, but I've forgotten the
procedure.
Hope this helps.
Dawn Jones
Eng Tech
University of Iowa
At 09:17 AM 1/17/02 -0800, Gordon, Heather C. wrote:
>Ah, the joys of the public land survey system. I've run into an odd
>conundrum, and I'm wondering if any of you have experience in something
>similar.
>
>Many legal descriptions of federally administered land parcels are described
>using PLSS, in township, range, and section language. For example, say I
>have an area whose legal description is "T16N R18W Sec. 33 SW/4SE/4SE/4"
>which can be translated as "the southwest quarter of the southeast quarter
>of the southeast quarter of section 33, range 18 west, township 16 north."
>Of course, I have the PLSS down to the section for the area of interest, but
>I've never seen it broken down further in any type of coverage or on any
>map. So how do I convert that legal description into digital format?
>
>Another wrench in the works is that sections are seldom regularly shaped:
>although they're supposed to be 40 acres, they're usually oddly-sized
>quadrilaterals (since the original surveyors were trying to account for the
>curvature of the earth). So how are they subdivided? If I were to cut a
>section into 20 acre rectangular east/west halves, and the sides of the
>section were like so: / /, would the division line be parallel or oriented
>towards north (straight up and down)?
>
>If you can offer any thoughts or shared experience on the matter, I'll be
>deeply grateful!
>Thanks in advance,
>Heather
>
>
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