#DYK Before GPS, satellites, lidar, and drones, cartographers relied on tools like the Gunter's Chain, a 66-foot-long chain with 100 links, for precise land measurement. 📷 Chainmen of the USGS measuring a baseline near Fort Wingate, New Mexico, 1883 #WorldGeographyWeek #GISWeek #GISDay #Geospatial #Cartography #GuntersChain
