Datum and Projection Job Sheet
A free, browser-based tool. Runs entirely in your browser — no sign up, nothing stored.
Job reference
Everything stays in your browser. Getting the datum, projection and units agreed up front is what stops a job ending up metres out.
Job sheet
Datum & projection job sheet
How to use this calculator
- Fill in the job name and the horizontal/vertical datum, projection, zone, epoch and units for the job.
- Add a geoid model and any notes.
- Copy or download the job sheet so the whole crew works to the same reference.
How it works
It assembles your entries into one consistent reference block — only the fields you fill in are shown.
Agreeing the datum and projection up front is the single biggest thing that stops a job ending up metres out (e.g. mixing GDA94 and GDA2020, or the wrong MGA zone).
Worked example
A typical WA job. Horizontal GDA2020, vertical AHD, projection MGA Zone 50, epoch 2020.0, units metres, geoid AUSGeoid2020 — captured once, shared with everyone.
Frequently asked questions
Does this convert coordinates?
No — it records the reference frame for a job. For converting between datums use the dedicated datum/grid converters.
Is this official course material?
No. It is free study support mapped to surveying course levels — not official North Metropolitan TAFE content or advice. Always follow your lecturer and the official assessment brief, and check your own working.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.