45N-90W

45⁰N - 90⁰W Geographic Marker Seiler Instrument is proud to have helped along with many other local surveying firms with the building and monument restoration/relocation of the 45th Parallel of Latitude and the 90th Meridian of Longitude.  In short, this is known as the 45-90 Geographic Marker, which is the center of the Northwest Hemisphere.  [...]