How to open a Google Earth KML file on a phone
KML files often arrive by message or email, then fail to open or appear in the wrong place on a phone.
Field takeaways
- KML/KMZ is a visual exchange format for Google Earth and GIS tools.
- KML expects WGS84 longitude, latitude, altitude order.
- Projected metre coordinates should not be written directly into KML.
- MapLab Survey can use KML/KMZ as a field layer for measurement and notes.
- KML imagery is not legal boundary evidence by itself.
The practical route
If the file arrived by email, WhatsApp, Drive or the file manager, first check the extension: .kml or .kmz. Google Earth opens KML as visual map content; in MapLab Survey the same file becomes a layer in a field project, with measurements, drawings, photos and notes added on top. A viewer shows you the shape; a layer lets you stand on the boundary and measure against it — which is usually why the file was sent.
On Android
Tapping the file lists the apps that can take it: Google Earth, MapLab Survey or another GIS app. If nothing opens, check that the download completed, that the extension is right, and whether the file is a compressed KMZ. Messaging apps rename files — changing the name back to .kml resolves a good share of cases.
On iPhone
Send the file to the supporting app from the Share menu. If it will not open directly, save it to the Files app and share it from there. Very large or complex KML files can slow a phone on either platform — split them by area or simplify before the field day.
If it opens in the wrong place
The classic mistake is metre coordinates written into the KML. KML expects WGS84 geographic coordinates in the order longitude, latitude, altitude; TM or ED50 data must be transformed properly first, and swapped E/N values carry the file to another part of the world. A file that loads onto an empty screen is a coordinate problem at the source, not a broken file.
From viewing to working
When a parcel boundary, working area or route arrives as KML, add it to the MapLab Survey project as a layer, collect new points on a separate layer, attach photos and notes, and export back as DXF, GeoJSON or CSV when needed. That flow turns the KML from a file being looked at into a measurable field layer. Determining an official boundary is licensed survey engineering work; the app speeds up the field side and does not replace the side that signs.
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
Why does KML open in the wrong place?
Usually wrong CRS conversion or swapped coordinate order.
Can KML be used as a layer?
Yes, it can be used as a field layer in MapLab Survey.
Is Google Earth imagery legal boundary evidence?
No. It is visual context.
Technical references
The field guidance in this article is aligned with the technical and official references below.
Related: Preparing KML for cadastre · Parcel query layer · Exporting field data to CAD/GIS · MapLab Survey