What is KMZ and how is it different from KML?
KML and KMZ are often confused. KMZ is a compressed package that usually contains KML.
Field takeaways
- KML stores map geometry and style.
- KMZ is a compressed package.
- KML is enough for simple geometry.
- KMZ helps when packaging extra files.
- MapLab Survey can use KML/KMZ as field layers.
KMZ is a zipped KML
A KMZ is a compressed archive containing a KML plus any images, icons or overlays it references. Same data model, smaller file, one attachment instead of several.
When to send which
Send KMZ when the file is large or carries images. Send plain KML when the recipient may need to open it in a text editor or feed it into a script.
How KMZ breaks
If the archive is built incorrectly or truncated in transit, nothing opens at all. A KML that fails usually still shows partial content, which makes it easier to diagnose.
Neither carries a projection
Both use latitude and longitude on WGS84. Any other coordinate system has to be stated separately.
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
What is KMZ?
A compressed KML package.
Which is better?
KML for simple geometry, KMZ for packaged content.
Can KMZ open on a phone?
Yes.
Can parcels use KMZ?
Yes, as reference data.
Technical references
The field guidance in this article is aligned with the technical and official references below.
Related: Open KML file · Open KML on phone · Preparing KML for cadastre · MapLab Survey