Traverse Closure and Adjustment
Latitude and departure misclosure, relative precision, and compass-rule adjusted coordinates.
Example
You enter
- Courses azimuth (deg) 0, distance 200, and 3 more
- Start N 0
- Start E 0
You get
- Sum dep 0.1
- Linear misclosure 0.1
- Perimeter (ft) 999.9
- Relative precision denominator 9999
Details, formula, and sources
Per course Lat = dist*cos(azimuth), Dep = dist*sin(azimuth); misclosure components = sum Lat, sum Dep; linear misclosure = sqrt(sumLat^2 + sumDep^2); relative precision = perimeter / misclosure (1:N); Compass (Bowditch) correction per course = -(course_length / perimeter) * (that component).
Traverse latitude/departure, linear misclosure, relative precision, and the Compass (Bowditch) rule adjustment per FM 5-233 Construction Surveying and the standard surveying references, by name; public-domain and first-principles.
FM 5-233 is public-domain US Government work, free at US Army publication archives. The field procedure, instrument calibration, and the surveyor of record govern the record traverse.
Estimate. AHJ and licensed professional govern.
Field names used by the API: courses, n0, e0, sum_dep, linear_misclosure, perimeter_ft, relative_precision_denominator
- Adjustment method Compass (Bowditch) rule; the transit rule and least-squares are alternativesFM 5-233