This was previously published on the NC Map Blog on May 15, 2019. It somehow has completely vanished. Not only is it no longer on the published blog, it isn’t anywhere in my list of posts on my admin page. Unfortunately, Internet Archive (Wayback Machine) captured only the blog home page in August 2019, at which time the Kocherthal post introduction was still there. However, the entire Kocherthal post page was not captured. I previously did save the post as a pdf, but this pdf did not capture footnotes, references, or hyperlinks. Here is a link to the pdf if the viewer below does not work in your browser.