Closed loop traverse · angle balance · coordinate closure

Traverse Reduction

Enter direct and reverse angle sets and forward/back distances. Angles are balanced to (n−2)·180°, azimuths are carried around the loop, and latitudes and departures are summed for linear error of closure.

Setup

Direction of travel

Angle entry

Starting azimuth · P1→P2

Northing of first point

Easting of first point

Azimuth from two known coordinates

Inverse · sets the starting azimuth

North — point 1

East — point 1

North — point 2

East — point 2

Angles at each point

Interior angle at each occupied point. Leave Rev blank to use the direct reading alone. The balance is spread evenly across every angle. In D-M-S mode, enter an angle as 127-38-03.

Distances

Leg from each point to the next

Azimuths, latitudes & departures

Traverse plot

Legs Closure error, exaggerated

Coordinates

Apply compass rule

The work, step by step

Show

Angular balance: correction = ((n−2)·180 − Σ measured) ÷ n, applied equally to every angle. Azimuth carry: next = previous + 180° ∓ balanced angle. Coordinates chain from the first point and are left unadjusted unless the compass rule is switched on. Nothing is stored — reload starts a blank sheet.