CogoKit is 10 coordinate-geometry calculators, a 61-page reference library, 12 long-form guides, 330 practice questions and 61 fully worked problems, for land surveyors and for candidates preparing for the Fundamentals of Surveying exam. Closing a traverse, solving a horizontal curve, reducing a level loop, converting between the survey foot and the international foot: the daily arithmetic of a crew, worked through in the open.
Where the material comes from
The reference pages list their sources, and two public-domain federal bodies of work carry most of the weight: the Bureau of Land Management's Manual of Surveying Instructions for the Survey of the Public Lands of the United States (2009) for the Public Land Survey System, and the National Geodetic Survey's publications for datums, heights and coordinate systems.
Where a quantity is exact by definition, the code uses the exact value rather than a rounded table: the US survey foot, for instance, is carried as exactly 1200/3937 metre.
Who runs it
CogoKit is a one-person project by an independent developer, who also keeps other single-subject references, among them Surveyor Case, SpanRef, GaugePass and Trigonify.
Guides and reference pages appear as CogoKit's work, without an individual byline, and their schema markup records the site's organization as author. No licensed surveyor is named, no license number appears and no seal is reproduced; the cited manuals are the authority, not this site.
What it deliberately does not do
- It does not reproduce the reference material supplied during the Fundamentals of Surveying examination. That document belongs to the exam provider, and you will have it on screen during the exam in any case.
- It does not teach any state's boundary law. Boundary questions here are limited to the nationally applicable principles - the PLSS, the commonly taught ordering of conflicting title elements, proportionate measurement - and name no statutes and no cases.
- It does not send your field data anywhere: the calculators run in your browser.
- It does not replace a licensed surveyor. A computed number is a check on your own work, not a professional opinion and not a sealed document.
On the exam, and on names
The Fundamentals of Surveying exam is developed and administered by the National Council of Examiners for Engineering and Surveying. This site names that exam because naming it is the only way to say what the practice material is for. Not affiliated with or endorsed by NCEES. NCEES® is a registered mark of the National Council of Examiners for Engineering and Surveying. Its specifications and examinee materials come from the council itself, and nothing here substitutes for them.
Corrections
If a result disagrees with your own computation or with a cited manual, send the page and the figure you got instead to [email protected].