Did some similar work with similar visualizations ~2009, on ~5.7M research articles (PDFs, private corpus) from scientific publishers Elsevier, Springer: Newton, G., A. Callahan & M. Dumontier. 2009. Semantic Journal Mapping for Search Visualization in a Large Scale Article Digital Library. Second Workshop on Very Large Digital Libraries at the European Conference on Digital Libraries (ECDL) 2009. https://lekythos.li…
I can imagine mining all of these articles was a ton of work. I’d be curious to know how quickly the computation could be done today vs. the 13 hour 2009 benchmark :)
Nowadays people would be slamming those data through UMAP!