Help deciphering these case dimensions?

[PCnooberson]

Im planning on building my own desk case, but finding exact dimensions has been rather rough. I did find this online, but it seems like complete gibberish? The official dimensions of the case are LxWxH : 1502mm x 726mm x 765mm

Yet these dimensions show the length being 4603mm
I thought, maybe all the dimensions are just a multiple of the actual? But the length is 3.06458056x bigger, while the width is a different 3.01473829x bigger.

Can anyone decipher what these numbers are supposed to be, if not dimensions?

http://shawnrabensburg.com/wp-content/uploads/2013/10/Internal_Test_Layout_Measure.jpg

 

[USAFRet]

That would seem to be this:
http://shawnrabensburg.com/portfolio/uncategorized/the-cross-desk/

Obviously, 4603mm is not right. That is 15.1 feet.

So, from one of his other pics, there are 8 x 120 or 140mm fans across the back, plus some extra space

8 x 140mm = 1120mm + another 600mm(?) for that extra space = 1720mm.
About 1/3 of that "4603mm" number.

Those dimensions are just junk. Meaningless.

 

[PCnooberson]

That would seem to be this:
http://shawnrabensburg.com/portfolio/uncategorized/the-cross-desk/

Obviously, 4603mm is not right. That is 15.1 feet.

So, from one of his other pics, there are 8 x 120 or 140mm fans across the back, plus some extra space

8 x 140mm = 1120mm + another 600mm(?) for that extra space = 1720mm.
About 1/3 of that "4603mm" number.

Those dimensions are just junk. Meaningless.

Yea like i said i know the outside dimensions, but knowing the internal ones would seriously save me a lot of trouble. Considering a lot of those numbers are super specific, they have to mean something? Hopefully someone on the internet can figure this out

 

[USAFRet]

Yea like i said i know the outside dimensions, but knowing the internal ones would seriously save me a lot of trouble. Considering a lot of those numbers are super specific, they have to mean something? Hopefully someone on the internet can figure this out

No, they don't have to mean anything.
That is just his design.

The only real numbers you need to worry about are in the ATX spec.
http://www.formfactors.org/developer%5Cspecs%5Catx2_2.PDF

Size of the PSU, spacing for motherboard mount points, spacing and threading for drive mounts, drive case widths.
Stuff like that.

Everything else is up to your design.

A good way to start with something like this is to obtain a junked PC.
Take all the parts out. Cut off the motherboard mount tray.
Lay it out on a piece of plywood, and see how it fits in your design. Use a Sharpie for those parts you don't yet have.