https://registry.opendata.aws/ https://bigdata-madesimple.com/70-websites-to-get-large-data-repositories-for-free/
https://solaris.readthedocs.io/
https://github.com/johanmodin/clifs/
http://ucrel.lancs.ac.uk/wmatrix/
https://pacscenter.stanford.edu/person/jeff-hancock/
https://dl.acm.org/doi/abs/10.1145/2187836.2187864
https://dl.acm.org/doi/abs/10.1145/2858036.2858414
https://dl.acm.org/doi/abs/10.1145/1518701.1518782
https://dl.acm.org/doi/abs/10.1145/2531602.2531646
https://ift6758.github.io/lectures/geolocation.pdf
https://www.youtube.com/watch?v=vsKNxbP8R_8