Some countries are excluded due to lack of available photos, North Korea and many African countries.
Use of S2 Geometry "http://s2geometry.io/devguide/cpp/quickstart", to index world as cells, with different levels associated.
Use of heatmap, to visualize the propability of what region the picture is from.
Could run the image through a text recognizion filter to narrow down what cell it is from.
https://www.geeksforgeeks.org/computer-vision/convnext/
https://github.com/facebookresearch/ConvNeXt/tree/main
https://docs.pytorch.org/vision/main/models/convnext.html
https://huggingface.co/docs/transformers/en/model_doc/convnextv2