COGO Survey Calculator icon

COGO Survey Calculatorv2.1

Released September 5, 2026Major

iOS

What changed

  • UXAdded customizable misclosure bearing display options for azimuth/quadrant and DMS/decimal formats.
  • UXIntroduced entry defaults in Preferences for distance units, azimuth/quadrant entry, and angle format.
  • New featureEnabled in-place editing of traverse legs with automatic recomputation of coordinates, closure, and area.
  • New featureAdded support for mixed units per leg (metres, feet, links) with background conversion.
  • New featureAdded Line Tools for four-point intersection and parallel/perpendicular constructions.
  • New featureAdded Common Tangent tool to calculate all four tangents between two circles.
  • New featureAdded Two Unknowns solver for missing distances or bearings against a closing point.
  • New featureAdded Recessed Invert field-term calculator for pipe inverts with a diagram.
  • UXAdded 'What's New' and Version history screens in Preferences.

Original release notes

v2.1 is built from working surveyors' feedback: misclosure bearings the way you read them, editable legs, mixed units, and four new geometry tools.

• Misclosure bearing display: choose azimuth or quadrant and DMS or decimal. Closure & Area shows the bearing at full size, the plot legend and PDF report follow the same setting.
• Entry defaults: set your distance unit, azimuth/quadrant entry, and angle format once in Preferences.
• Edit any traverse leg in place — downstream coordinates, closure, area, and plot recompute.
• Mixed units per leg: type metres, feet, US survey feet, or links on any leg; the job converts in the background. Changing a job's unit now converts stored values.
• Line Tools: four-point intersection, parallel and perpendicular constructions with station, offset, and left/right.
• Common Tangent: all four tangents between two circles (L-L, R-R, L-R, R-L) from two centres or a bearing + distance, with offsets.
• Two Unknowns: solve two missing distances, bearings, or one of each against the closing point, offsets included, and apply the result.
• Recessed Invert: field-term calculator for recessed pipe inverts with a diagram.
• What's New on update and a Version history screen in Preferences.

Fully offline. Thanks for using COGO Survey Calculator.

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