Celebrating St. Patrick’s Day with Maps, By Aileen Buckley, ESRI
The following link will take you to these maps: “Geo-Genealogy of Irish Surnames”, “The Luck O’ The Irish Ancestry Map”, “Irish populations in Montana and Nebraska”, “The Mine and Mineral Processing Plant Locations maps from the U.S. National Atlas” (for analysis). There are some great Story Maps included as well. Oh, be sure to give yourself plenty of time to enjoy these maps!
http://blogs.esri.com/esri/arcgis/2012/03/16/celebrating-thisst-patricks-day-with-maps/