The Bowditch (Compass) Adjustment: Corrections in Proportion to Leg Length
This lesson is part of the course
In this lesson
You distribute the leftover ΣΔN and ΣΔE over the five legs in proportion to their lengths, adjust every latitude and departure so that both sums close to zero, and find the leg that takes the largest correction.
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Lessons in this course
- Angle Units & Angular Misclosure: DMS, Decimal Degrees and the (n − 2) × 180° Check Locked
- Bearings & Azimuths: Carrying Whole-Circle Bearings Round the Traverse, Back Bearings and Quadrant Bearings Locked
- Distance Reductions: Repeat Readings, Slope to Horizontal and Correction Factors Locked
- Latitudes & Departures: ΔN and ΔE, Linear Misclosure, Precision 1 : x and an Accuracy Class Locked
- The Bowditch (Compass) Adjustment: Corrections in Proportion to Leg Length Locked
- Coordinates & Joins: From a Start Point, Join Bearings with ATAN and a Quadrant Correction, and Radiation Locked
- Levelling: Rise-and-Fall and Height-of-Collimation Side by Side, Arithmetic Checks, Misclosure & Distribution Locked
- Capstone – Area & Setting Out: Parcel Area from Coordinates, a Setting-Out Table and the Traverse Plot Locked