Scale is 1:25
Google to Madurodam and you find many sites with photos about this miniature city.
The following site says it includes a whopping 58 ships.
the latter shows a lot of photos.
This is one of the best tourist attractions in Holland.
I also posted another photo on main page -- models -- koningin beatrix
Don't know how you can get a plan, I have no contacts in that field.
Found a photo in a gallery where it appears that small models were made at a school??