Area and perimeter from coordinates
Enter or paste the corner coordinates; area, dönüm, hectares, perimeter and edge lengths are calculated instantly and the parcel is drawn.
| Point | Y | X |
|---|
Bulk paste from NetCAD / Excel
One point per line: Name Y X or Y X. Tabs, spaces and semicolons are accepted; decimal comma works too. You can also paste straight into the table.
Edge lengths
Results are for information only. Official areas are those in the land registry; order a setting-out to see your boundaries on site.
About area calculation
How is area calculated from coordinates?
The corner points are taken in order and the Gauss (shoelace) formula is applied: 2A = Σ (Yᵢ · Xᵢ₊₁ − Yᵢ₊₁ · Xᵢ). Clockwise or anticlockwise order does not matter, but the order must follow the boundary.
How many square metres is one dönüm?
The modern dönüm is 1,000 m². 1 hectare = 10 dönüm = 10,000 m²; 1 decare = 1 dönüm.
Which one is Y and which is X?
In Turkish maps Y is the easting (usually 6 digits, e.g. 520140) and X is the northing (usually 7 digits, e.g. 4077020). If you swapped them, area and perimeter stay the same; press “Y ⇄ X” to fix the drawing.
Why is the result different from the title deed area?
The deed area can differ slightly because of survey date, coordinate system (ED50 / ITRF96), projection scale and rounding. For official purposes the land registry is authoritative; order a boundary setting-out for certainty.
Does it work with latitude/longitude (Google Maps)?
Yes. In “Geographic (lat, lon)” mode points are projected to a local Transverse Mercator on the GRS80 ellipsoid. Points taken from a phone or web map can be off by metres, so treat the result as approximate.
Need an exact survey?
We mark your parcel corners on site and compare the area with official records.