'P' is the key

[Loose_Spell_9313]

Okay, I'll entertain the notion you weren't intentionally lying. Here's what I have issue with...

You opened with the statement: 

"The map with ship vellum is 29cm high x 41cm wide, while You are not allowed to view links. Register or Login to view. is ~22.5cm high. So it would be more like this (my best attempt):"

This is categorically untrue and I don't know why you would go through the effort of going and getting the measurements and then obfuscating that not only is that not the vellum dimensions, but avoiding listing the vellum vs sheet dimensions. The 'Map with Ship' vellum is 23.5cm.

Anything after this, I gotta be honest I checked out.

With the real measurements and only a 1.5cm discrepancy, scaling the height appropriately is sound. And I'd imagine you'd find that in the version I posted, there is also an additional buffer at the bottom, which would further account for any discrepancies in the 1.5cm.

You replied as I edited my post, I mentioned what I took the measurements to mean. I'll post again in case. 

If you are saying the vellum in the image is 22cm x 19cm, that makes no sense. Its a clear rectangle, not a square. Its far more wide than tall as well. The 22x19 is the size of the map, I believe. Something like this:

You're using the wrong measurement still for the 'Map with Ship'. Please see my previous statement.