Levelling: Rise-and-Fall and Height-of-Collimation Side by Side, Arithmetic Checks, Misclosure & Distribution
This lesson is part of the course
In this lesson
You reduce a fictional levelling run from BM1 to BM2 twice – by rise and fall and by height of collimation – run the arithmetic checks, compare the misclosure with a fictional allowance k × √km and distribute it over the set-ups.
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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