Convert KMZ to OFF

Understanding KMZ and OFF file formats

KMZ is a compressed file format used by Google Earth to store geographic data, including placemarks, paths, and 3D models. It is essentially a zipped version of a KML file, often containing additional resources like images or 3D model files (such as COLLADA .dae).

OFF (Object File Format) is a simple geometry file format used to describe the shape of a 3D object. It stores information about the vertices, faces, and edges of a polygonal mesh, making it popular in computational geometry and 3D modeling applications.

How to convert KMZ to OFF

Direct conversion from KMZ to OFF is not straightforward, as KMZ files may contain 3D models in COLLADA (.dae) format, but not directly in OFF. The process involves extracting the 3D model from the KMZ and then converting it to OFF.

1. Extract the 3D model from KMZ: Rename your .kmz file to .zip and extract its contents. Look for a .dae (COLLADA) file inside.
2. Convert DAE to OFF: Use a 3D modeling tool or converter that supports both DAE and OFF formats.

Recommended software for conversion

• MeshLab: A free, open-source tool that can import DAE files and export them as OFF. To convert, open your DAE file in MeshLab, then use File → Export Mesh As… and select OFF as the output format.
• Blender: While Blender does not natively export OFF files, you can import the DAE file and use an OFF export plugin or script.
• Online converters: Some online services may support DAE to OFF conversion, but always verify the output quality and privacy policies.

Tips for successful conversion

• Ensure your KMZ contains a valid 3D model in DAE format.
• Check the geometry after conversion, as some details may be lost or require manual adjustment.
• MeshLab is generally the most reliable and user-friendly option for this workflow.