[jimhefferon]

I followed your link but it did not lead to a discussion of Longitude. It lead to a discussion that mentioned Longitude and had a link to a longer discussion, which however was dead for me. If you could fix that, I for one would be interested in more.

[abrowne]

I posted some better info in a reply to a sibling comment: https://news.ycombinator.com/item?id=18746779