Land Area Mapper

—

Units

Find a place

Exact coordinates jump straight to the point at full zoom. Decimal (-17.606222, 16.893528), degrees-minutes-seconds (17°36'22.4"S 16°53'36.7"E) or a pasted Google Maps link.

Boundary

Click to place each corner — four is enough to start. Finish, then drag the white handles to adjust, or drag a faint midpoint handle to add a corner. Click a corner to type its coordinates instead of dragging. Double-click a corner to remove it.

Paste a corner list

One per line or all run together, decimal or degrees-minutes-seconds. Corners are joined in the order given. If that order crosses itself, Untangle reorders them around the centre; Outer boundary keeps only the corners on the outside and drops any that fall within.

Survey

Boundary schedule

Leg	Length	Bearing

Display

Base map

Plot colour

Number the corners Label each leg length Show widest and narrowest spans Show bounding box

Save & share

Name this plot

The file is plain GeoJSON with the measurements attached, so it also opens in QGIS, Google Earth Pro and geojson.io. Anyone with this page can load it and keep editing.

Accuracy

Areas are computed on the WGS84 ellipsoid radius, not on the flat screen, so they hold at any latitude. Expect agreement with a professional survey to within the accuracy of the imagery itself — typically a few metres of horizontal registration. This is a planning tool, not a cadastral one.