A place, thought leader, tool, event, and geographic oddity: January 2026 podcast in the Thinking Spatially series. This month I feature:  The shortness of the Alabama coastline, Eratosthenes' Earth Measurement, GIS as a tool, the Earthrise 1968 photo, and the northernmost, easternmost, southernmost, and westernmost points of land in the USA.  Enjoy! Joseph Kerski at GIS lighted sign