This example uses the sample survey LEARN LEAST SQUARES NETWORK.trv included with TPC. 

1.We solved the solved the Least Squares network for the sample survey LEARN LEAST SQUARES NETWORK.trv using a 95% confidence interval.

2.We turned on error ellipses in the drawing.

3.We selected Traverse 1 (delineated) in the ALTA tab as the boundary traverse we want to test.

4.We generated the following report, telling TPC to use both Test #1 and Test #2.  Both tests passed.

[ Relative Positional Precision (RPP) ]

Maximum allowable RPP based on 'line of sight distance' and 0.07 Feet and 50 ppm at 95% confidence level

95% confidence level was used for this solution

[ Test #1: Semi-major Axis of Error Ellipses ]

F-Statistic Multiplier (95% Confidence) 2.864 is applied to Semi-Major and Semi-Minor values.

Because the ChiSquared test failed, the Reference Standard Deviation 0.287 will also be applied.

 Traverse: Traverse 1

 A1 Semi-Major 0.000' <= 0.070' Passed

 1 Semi-Major 0.035' <= 0.070' Passed

 2 Semi-Major 0.063' <= 0.070' Passed

 3 Semi-Major 0.058' <= 0.070' Passed

 Test #1 Passed (4 points passed, 0 points failed) 

[ Test #2: Standard deviations of distances between monuments ]

 Traverse: Traverse 1

 A1 to 1 stdDev 0.013' <= 0.128'  Passed

 1 to 2 stdDev 0.013' <= 0.155'  Passed

 2 to 3 stdDev 0.013' <= 0.143'  Passed

 3 to A1 stdDev 0.013' <= 0.178'  Passed

 Test #2 Passed (4 distances passed, 0 distances failed)

Related Topics

ALTA/NSPS Land Title Surveys

Editions

Professional

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