Here's another "technical bug" from Springer. Rebadging of PLoS content as "Springer Images", under CC-NC and for re-sale.
"Once is happenstance. Twice is coincidence. The third time it's enemy action."
There are too many different sources to assume it's a glitch. It looks like a systematic attempt to copyright Open material. Note that there is NOTHING in this material that highlights PLoS' copyright and CC-BY licence. (Lesson: It's a very good idea to stamp all OA material everywhere to prevent predatory companies like Springer).
Map of sampling sites. From: Rusch, D. B., Halpern, A. L., Sutton, G., Heidelberg, K. B., Williamson, S., et al. (2007). The Sorcerer II global ocean sampling expedition: Northwest Atlantic through Eastern Tropical Pacific. PLoS Biology, 5(3), e77 DOI 10.1371/journal.pbio.0050077
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'A Map of Lewis and Clark's Track, Across the Western Portion of North America from the Mississippi to the Pacific Ocean.' Copied by Samuel Lewis from the original drawing by William Clark. Published in 1814
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