Take a look at the official Downloads and Documentation website Downloads and Documentation: Getting the Most out of your Board , there you’ll find the file you need, it is named “Intel Edison DXF File”
I did not find more information in the official page. No DXF for the Arduino board.
The Intel DXF file is only for the Edison alone.
After few days, I redrew the Intel Edison for Arduino kit with skechup.
I took all the dimensions from the Hardware Guide, revision 007, but I'm not sure if there are corrects.
Is anybody have the exactly mechanical drawing to finish the job and release the file for the community ?