"Horses for courses", part II

Update 2: see two much later updates here (this spot) and here (Northwest Passage)

Update 1: a fascinating firsthand report from the discoverers posted on Russell Potter's excellent blog.

A previous post here contrasted full professional workflows for petroleum geology students, with very simple analytical tools for a businessman looking to ascertain population density. As my subsequent posts show, I have an interest in Antarctic and Arctic maps, history and climate as for example in this Story Map.