Lot Area & Perimeter from Coordinates
Paste an ordered Easting, Northing coordinate list to calculate plane shoelace area in square metres and hectares, closing-ring perimeter, orientation, and each leg's grid bearing and distance. Exact duplicate vertices and self-intersections are shown for review.
Uses only this tool title and its public link. Inputs, results, coordinates and filenames are not included. Sharing starts only when you press the button.
Free advisory field tool — every result is computed in your browser from the inputs you provide and is advisory and unverified, not for survey deliverables. Where a published guideline applies, results only ever read “within guideline” or “exceeds guideline — review”. The full working is shown for every calculation so each step can be re-checked. Registered surveyor confirmation required before reliance.
Area, perimeter and legs
One simple closed ring was calculated from the supplied order.
- Shoelace magnitude (m2)
- 1500
- Area (ha)
- 0.15
- Perimeter (m)
- 160
- Orientation
- anticlockwise
- Vertices
- 4
| Leg | From - to | Bearing DMS | Distance (m) |
|---|---|---|---|
| 1 | P1 - P2 | 90°00′00.00″ | 50 |
| 2 | P2 - P3 | 0°00′00.00″ | 30 |
| 3 | P3 - P4 | 270°00′00.00″ | 50 |
| 4 | P4 - P1 | 180°00′00.00″ | 30 |
Show the working
- signed double areasum(Ei * N(i+1) - E(i+1) * Ni), translated to point 13000
- shoelace areaabs(signed double area) / 21500
- area in hectaresarea in square metres / 100000.15
- perimetersum of closing-ring leg distances160
- duplicate groupsexact repeated E,N vertices0
- intersection pairsnon-adjacent closed-ring segment intersections0
Working trace rendered from the same computation as the result above — re-check any step by hand before relying on it.
Prepare a local sheet copy (PDF/CSV)
Prepare the current lot area sheet directly in this browser. CSV downloads here; PDF opens the print dialog so you can save it. Nothing is submitted to SurveyMarkup.
How to calculate lot area from an ordered coordinate list
Paste an ordered plane-grid ring, calculate its geometry and inspect the topology cues before relying on the figures.
Prepare the vertex order
List each Easting and Northing once in consecutive boundary order; the tool closes the final point back to the first.
Paste or load the coordinates
Paste comma-separated or whitespace-separated E,N rows, or load the fictional worked example.
Review area and topology
Inspect square metres, hectares, perimeter, orientation, each leg and any duplicate or self-intersection cue.
Questions about Lot area from coordinates
Can I calculate lot area from coordinates in MGA2020 format?
You can paste Easting and Northing values in an MGA2020-style list, but the calculator treats them as generic plane-grid coordinates. It does not establish the actual datum, zone or epoch.
What order should the lot vertices use?
Enter consecutive boundary vertices around one ring. Do not repeat the first point at the end; the tool closes the last vertex back to the first and reports the orientation.
Is the displayed square-metre or hectare value a title or ground area?
No. It is a plane shoelace magnitude from the entered coordinates. The tool does not infer combined scale factor, title boundary status or ground area, and a crossing ring needs review.
Safety & scope
SurveyMarkup helps prepare and review working information. Every professional decision remains with the registered surveyor, and original data and final outputs require qualified review.
Assistance only - professional review remains required.