Inspired by Mike Bostock's population pyramid, global salmon hatchery release data plotted as an interactive pyramid. https://isdl-220916.appspot.com/release
There is some affordance for this in Darwin Core with the RecordLevel class, but this class holds foreign keys or IDs for contributors etc. This can be expanded with relationships that point to more detailed information regarding the contributor or t...
The beauty of graphs. This is the hatchery release data for US and Canada, NPAFC Hatchery Statistics Species Data - Canada, United States, graph 2b1841ac-73d1-4603-9492-2f281f375171.