Area

Area measurement app: square metre, decare and perimeter on a phone

9 min read June 18, 2026

People searching for an area measurement app usually want a quick answer: how many square metres, decares or metres of perimeter.

Field takeaways

The boundary source must be clear: GPS walk, manual drawing, KML/DXF or RTK measurement.
Phone GPS is useful for approximate area, not official parcel area.
1 decare is 1000 m2 and 1 hectare is 10,000 m2.
The polygon must close for a reliable area.
MapLab Survey keeps area, perimeter, notes, photos and export in one project.

Three practical ways

Draw the boundary manually, walk it with GPS, or import an existing KML/DXF. The right method depends on the job. Phone GPS can be enough for planning, while official or precise work needs professional control.

MapLab Survey workflow

Create a project, add an area layer, draw or import the boundary, close the polygon, read area and perimeter, then export to KML, DXF, GeoJSON or CSV.

Units

1 decare is 1000 m2. 1 hectare is 10,000 m2. Keep the unit and boundary source in the project note.

In the field · MapLab Survey

Measure, check and deliver in the right format.

MapLab Survey is a mobile field app for RTK/GNSS points, drawings, area/volume calculations, coordinate conversion and export to DXF, KML/KMZ, GeoJSON and CSV. Capture, calculation and export can work offline; live NTRIP corrections and online basemaps need connectivity.

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Frequently asked questions

What should an area app support?

Area, perimeter, layers, KML/DXF export, offline use and CRS support.

Is phone area measurement accurate?

Useful for approximate work, not official surveying.

Can MapLab Survey export KML?

Yes, KML/KMZ, DXF, GeoJSON and CSV are supported.

What is 1 decare?

1000 square metres.

Technical references

The field guidance in this article is aligned with the technical and official references below.