My current thesis research is based around georeferencing historical maps in a collaborative, crowdsourced environment.
I use Observable a lot to create web maps--sometimes to share ideas, other times to just test out new layers.
This was a testing ground for the historic map overlays and extra basemaps that I included in the Cane River Heritage Inventory & Map.
This map features a two special layers related to Vernon County: a 1967 US Army Corps of Engineers map of Kickapoo Valley Reserve and a LiDAR-derived relief basemap.
Staging ground for 2015 work on Armed Forces Retirement Home historic map overlays. These will be used in the new Arches installation for the AFRH.