Module 6: QA/QC, Ethics, and Capstone Workflow - Worked Examples

The authoring surveyor used 52.48 m for one course. The independent checker re-extracts the approved plan and finds 52.84 m.

A client asks the Geodetic Engineer to “move the line 20 centimeters” so an existing fence will appear inside the property.

A field crew sets a stake at a computed coordinate even though the approved plan and an adjoining record are still being researched.

The checked plan lists the directed boundary as P1-P2-P3-P4-P1. The technical description begins at P3 and lists P3-P4-P1-P2-P3. After rotation, all four corner identities and directed bearing-distance calls match the checked geometry.

A checked plan lists P1-P2 as $40.000\text{ m}$, P2-P3 as $30.000\text{ m}$, P3-P4 as $40.000\text{ m}$, and P4-P1 as $30.000\text{ m}$. A draft technical description begins at P3 and preserves the same cyclic order, but lists P2-P3 as $29.820\text{ m}$.

The drafted plan appears correct, but the raw total-station observation file for one field day cannot be located.

The survey is complete and shows a fence crossing the retraced boundary by varying offsets.

A four-corner parcel has two well-supported monuments, one missing corner, and one old monument that conflicts with a supplied coordinate by 0.55 m.

The survey package is complete except that two authoritative-looking record copies contain irreconcilable common-line information that could materially affect one corner.

For a synthetic training project, the work instruction states an independent check-point residual limit of $0.020\text{ m}$ for this exercise only. A known check coordinate is $(E,N)=(2400.000,1800.000)\text{ m}$; the independent observation is $(2400.012,1799.991)\text{ m}$. Compute the residual magnitude and classify this check.

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A synthetic classroom packet uses a local metre grid and has no legal parcel status. The checked plan gives P1 $(E,N)=(1000.000,2000.000)$, P2 $(1060.000,2000.000)$, P3 $(1060.000,2050.000)$, and P4 $(1000.000,2050.000)$, in order. P1, P2, and P4 are recovered; P3 is not found on the first search. A draft report states area $2980.000\text{ m}^2$.

The traverse summary gives course lengths $60.000,50.000,60.000,50.000\text{ m}$, total length $220.000\text{ m}$, $f_N=+0.006000\text{ m}$, and $f_E=-0.0051909\text{ m}$. The fictional exercise sheet asks for a relative closure of at least $1:10{,}000$ and a check-point residual no greater than $0.020\text{ m}$. An independent check-point reference is $(E,N)=(2400.000,1800.000)\text{ m}$; the observation is $(2400.012,1799.991)\text{ m}$. On P1-P2, fence offsets are $+0.600\text{ m}$ at Sta. $22.000\text{ m}$ and $-0.600\text{ m}$ at Sta. $30.000\text{ m}$, with the subject-parcel side positive.

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