How to edit a KMZ file
- Open the editor. Select Open and choose your
.kmzfile. EditPolygon decompresses and reads it locally in your browser. - Select a polygon. Click a feature on the map or in the feature list. Enter vertex-editing mode to move, add or remove points.
- Run validation. Use Validate / repair polygons to check for unclosed rings, self-intersections and other export problems.
- Export the result. Choose KMZ if the receiving system requires KMZ, or GeoJSON when you want a simpler web-mapping format.
What to check after editing
KMZ is a compressed package that usually contains KML and may also contain icons or other assets. EditPolygon focuses on geometry and feature properties. After export, check styling, folder structure, labels, altitude values and any embedded resources if those details matter to your workflow.
| Element | Recommended check |
|---|---|
| Polygon and MultiPolygon geometry | Inspect every part and hole, then run validation. |
| Feature names and properties | Confirm important attributes are still present. |
| Styles, icons and folders | Verify in the destination software after export. |
| Coordinate assumptions | KML normally uses longitude, latitude order in WGS 84. |
Common KMZ editing problems
The file opens but no polygon appears
The archive may contain points, lines, overlays or unsupported KML constructs rather than polygon geometry. Inspect the import preview before adding the file.
The polygon looks displaced
This often indicates an incorrect coordinate order or a source file that was converted from a projected coordinate reference system without reprojection.
The exported file fails elsewhere
Run validation and repair before export. Also test the exported file in the application that will consume it; format support differs between GIS products.
Ready to work on your file?
Open the editor, import your geometry and use the relevant operation from the toolbar or More menu.
Open the editor