How to measure a lot: parcel boundary, corners, area and official survey
Lot measurement needs more care because boundaries often relate to buildings, roads and legal records.
Field takeaways
- Parcel reference, occupation boundary and official boundary must be separated.
- Phone GPS is approximate.
- Corners and stake-out need professional control.
- KML/DXF can be reference data.
- MapLab Survey organizes notes, measurements and exports.
Small plots punish error
On a building plot the boundary is mostly corners, so a few metres of GNSS uncertainty translate into a large percentage of the area. This is where phone measurement is weakest.
Occupation versus title
Walls and fences on urban plots are frequently built by eye. What you measure is what is there, which may not be what is registered.
Urban sky is difficult
Buildings block and reflect satellite signals. Occupy each corner longer, and repeat corners that will not settle.
When it has to be legal
Anything affecting a sale, a permit or a party wall needs a licensed cadastral survey. Use your own measurement to prepare, question and check.
Try these steps on your own phone.
MapLab Survey handles RTK/GNSS point capture, drawing, area and volume calculations and coordinate conversion, then exports to DXF, KML/KMZ, GeoJSON, Shapefile, GeoPackage, NCZ or CSV. Capture, calculation and export work offline. Live NTRIP corrections and online basemaps need a connection.
Frequently asked questions
Can a phone measure a lot?
Approximately, yes.
How are lot corners found?
With authorized survey control.
Is parcel KML official boundary?
Not by itself.
How does MapLab Survey help?
It organizes reference and field records.
Technical references
The field guidance in this article is aligned with the technical and official references below.
Related: Finding parcel corners · Parcel query on phone · Parcel area difference · MapLab Survey