You can possibly generate and save a .dxf file from shapes in a .kmz or .kml file (Google Earth markup) with several programs that support this function. Probably used to generate a shape from some part of map.
Convert Compressed Keyhole Markup Language (Google Earth) data to AutoCAD DXF Drawing Exchange Format.
We found 4 software records in the database related to .kmz to .dxf file format conversion.
Microsoft Windows software - convert kmz to dxf on Windows
A CAD 3D geometry translation software
Convert from kmz file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned kmz to dxf. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A software used to geocode pictures
A very popular free program used for work with 3D graphics
Apple macOS / Mac OS X software - convert kmz to dxf on OS X
3D modeling application for Mac