How to create a KML file for points, lines, areas and parcels
KML is one of the simplest ways to share field geometry, but layer names and coordinate handling matter.
Field takeaways
- KML can carry points, lines, polygons and simple styling.
- KML coordinate tuples are longitude, latitude and optional altitude.
- Use clear layers for parcels, routes, measured areas and notes.
- MapLab Survey helps export field data to KML/KMZ.
- CAD/GIS delivery may also need DXF, CSV or GeoJSON.
Draw or capture, then export
A KML can come from features you drew on a map or points you measured on the ground. The file looks the same either way, which is why the source has to be recorded separately.
Name the features
Give each point and polygon a meaningful name before exporting. Files full of "Point 1" cost the recipient more time than they saved you.
It is always WGS84
KML stores latitude and longitude on WGS84. If your data is in a projected system, the export transforms it, so verify one point afterwards.
Say what it represents
Send the date, method and purpose with the file. Otherwise the recipient treats a sketch as a surveyed boundary.
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 create KML?
Yes, MapLab Survey can export field geometry as KML/KMZ.
What is KML coordinate order?
Longitude, latitude and optional altitude.
Can parcels be shared as KML?
Yes, as references.
KML or DXF?
KML for map viewing, DXF for CAD delivery.
Technical references
The field guidance in this article is aligned with the technical and official references below.
Related: Open KML file · What is KMZ? · Parcel query layer · MapLab Survey