How to open a KML file on a phone
KML is one of the most common map files used in the field for parcels, routes, boundaries and points.
Field takeaways
- KML carries location data in WGS84 geographic coordinates.
- Parcel or site KML can be opened on a phone and used as a layer.
- TUREF or ED50 metre coordinates need transformation before KML delivery.
- Viewing KML is different from connecting it to field measurement.
- MapLab Survey connects KML/KMZ to measurement and export workflows.
Start with the name
Many messaging apps add suffixes or change the extension. Renaming the file back to .kml solves a large share of cases where nothing opens.
Open it with a map app
Open the file from an application that can import it as a layer, not from the message preview. Then you can see it over the terrain and measure against it.
Size decides
A file with tens of thousands of features can lock up a modest phone. Split it by area or simplify it before it goes to the field.
It opens but shows nothing
If the file loads and the map stays empty, the geometry is probably in another part of the world, which is a coordinate problem at the source.
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 KML open on a phone?
Yes, with MapLab Survey or Google Earth.
What is KMZ?
A compressed KML package.
Can parcel KML be opened?
Yes, as a reference layer.
Why is my KML shifted?
Wrong CRS transformation or coordinate order.
Technical references
The field guidance in this article is aligned with the technical and official references below.
Related: Open KML on phone · Preparing KML for cadastre · Parcel query layer · MapLab Survey