Somewhere in the blog I provide an explanation of how to use the NDIC GIS map server. (I have not updated that post in ages, so there may be some inaccuracies. It was accurate at the time I posted it to the best of my knowledge, which is quite limited.)
I understand much of the GIS map server, but not all of it. But I understand enough of it to a) make it useful; b) know that it is the best GIS map server among the 50 US states; and, c) make me think I know all I need to know about the GIS map server.
Recently there has been a new wrinkle: "overlapping spacing units." I explain how the GIS map server designates "overlapping spacing units" elsewhere. At that site, scroll to the August 2, 2013, entry.
