Our advice is to set 2mm for thickness in order to have the best ratio solidity / saving material.
Upload model on a 3d printing manufacturing service
If you do not own a 3D printer, you should use on of the online 3d service for manufacturing, we used successfully Sculpteo which support Multicolor models OBJ + MTL, but you can try others like Shapeways or i.materialize.
After uploading the model, you can choose the material you want. You generally have only one choice if you want to print in color with the satellite imagery texture. (At the time of this post, printing a 80 x 80 mm model in full color costs around ~30 US$ on Sculpteo)
After a few days, you should receive your model, which will look like this:
Aside from being able to directly open you mobile browser and use the methods described above, several apps offer support for the glTF format, I am gonna feature glTFShowCase which is available on both iOS and Android
After installing the app, open this link in your mobile browser and choose to open with glTFShowCase.
With this app you can save and view your file offline
And even view it in Augmented reality (AR) 🤯 !
Microsoft is part of the glTF Working group and is making glTF very easy to work with, on Windows 10 you can directly view your files with the 3D Viewer app.
Even better than this, the Office suite is already supporting glTF, for example you can add a glTF file directly on a powerpoint presentation.
At the time of writing this article, macOS is still lagging behind for first class glTF support, but some third party app exists to preview them.
glTF is very well supported across platform and that is why it is also the export format for https://maps3d.io.
For some reason if you need to convert it to another 3D format (OBJ, STL, COLLADA …), you can do it with blender > 2.80 (currently in beta) which has a built-in importer for glTF.