Geometric world map (resized version):

Default size is around 150cmx90cm with resized continents

167 pcs (all parts can be print at full size on a standard printer bed)
All parts are numbered on the back and here you can find the numbers assignment :
Geometric world map (pdf)

Organize pieces to the wall:

use paper mask
print pdf it with the same scale of your 3D print. tape it to the wall at the right level then place the first or 2 pieces to the wall then add other pieces like a puzzle game
custom scale or custom paper format: you can generate the paper mask with the scale and the paper format that you want using adobe acrobat reader Dc ( free version) it lets you print in "poster" mode and select the paper format that you want.
use projector
print one or two page of the paper mask with the same scale of your print and tape it/them to the wall at the right level
project the fullsize pdf, scale it and level it to the paper mask

Fix pieces to the wall:

use velcro tape
use double sided tape
use hot glue
use blu-tack ( you can also add small pieces of paper tape between wall and blu-tack to be sure to not have any traces to the wall)
...

paper mask: (print on A4 pages without margin and resizing)
you can use one page to place your first pieces to be sure to have it at the right level

Full size geometric worldmap (resized) fullsize multiA4 (pdf)
Half size geometric worldmap (resized) halfsize multiA4 (pdf)
Custom: use this Fullsize pdf file adapt the dimension and paper format as you want

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Geometric world map (resized version)

0.2mm layer, 2 walls, 10 infill