principal meridian


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principal meridian

[′prin·sə·pəl mə′rid·ē·ən]
(civil engineering)
One of the meridians established by the United States government as a reference for subdividing public land.
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Tenders are invited for purchase and develop the property legally described as follows: lots 11, 12, 13 and 14 in the town center subdivision, being a subdivision in the east 1/2 of the southeast 1/4 of section 34, and the west 1/2 of the southeast 1/4 of section 35, township 41 north, range 9, east of the third principal meridian.
Transit-oriented Development Site
In irregular astigmatism the orientation of the principal meridian changes from point to point across the pupil.
Corneal astigmatism in leprosy and its importance for cataract surgery
In 1815, two surveyors set out with stakes, chains, and compasses to establish Michigan Territory's baseline and principal meridian, the standard coordinates by which townships and property descriptions would later be established.
Michigan celebrates survey bicentennial
After 'zeroing' the focimeter, the first step is to establish the power of the principal meridian with the higher absolute back vertex power (BVP).
Spectacle verification
Peter Dorsher's study of Myers' nine myofascial meridians revealed that, 'In 8 of 9 comparisons, there was substantial overlap in the distributions of the anatomically derived myofascial meridians with those of the acupuncture Principal Meridian distributions'.
Acupressure and myofascial therapy: a unified approach
the axis varied +- 15-30o from 180 principal meridian, which is in agreement with other studies conducted on the refractive errors of children.
Frequency of amount and axis of astigmatism in subjects of Rawalpindi, Pakistan
Thus, the description of a township as "Township 16 North Range 7 West" would mean that the township is situated 16 tiers north of the Base Line for the Principal Meridian and 7 ranges west of that meridian.
Surveying, mapping & subsurface investigation
The K-readings can be used to determine the radius of the steeper meridian, along with the use of axial edge tables to finalise the peripheral curves for each principal meridian, or it may be possible to determine the fit from the fluorescein pattern
The soft approach to RGPs: part 3: don't let torics put you in a spin
He is a charter member of the 6th Principal Meridian Surveyors, vice president for Southern Colorado Professional Land Surveyors, a member of the Colorado Department of Transportation Survey Activities Committee (a group overseeing surveying within the department), project manager for the Statewide GPS Network, surveying instructor for the department, chair for Colorado Section - American Congress on Surveying and Mapping, and a member of the Civil Technology Advisory Committee for Trinidad State Junior College and the University of Southern Colorado.
About our cover
Croswell~s Subdivision of Original Lot 26 of the Mesheketeno Reservation in Township 31 North, Range 12 East of the Third Principal Meridian; together with that part of Lot 13 of the Subdivision of Original Lot 27 of the Subdivision of the Mesheketeno Reservation in Township 31 North, Range 12 East of the Third Principal Meridian, formerly known as Lots 3 and 5 of the Subdivision of said Lot 27, lying westerly of the southerly prolongation of the westerly line of Lot 2 in Drake~s Second Addition to the Village of Bourbonnais, aforesaid, all in Kankakee County, Illinois.
Sale of real estate

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