North American Datum
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The North American Datum is the horizontal datum used to define latitude and longitude in North America. A datum is a formal description of the shape of the Earth along with survey markers serving as
The Meades Ranch Triangulation Station, the fundamental station for the North American Datum of 1927
The Meades Ranch Triangulation Station is a survey marker in Osborne County in the state of Kansas in the Midwestern United States. The marker was initially placed in 1891. From 1901, it was the refer
North American Datum
…north and the triangulation arc along the 98th meridian west that was near the geographic center of the contiguous United States. The datum declares the Meades Ranch Triangulation Station in Osborne County, Kansas to be 39°13′26.686″ north latitude, 98°32′30.506″ west longitude. NAD 27 is oriented by declaring the azimuth from Meades…
Horizontal survey control network in the United States in 1931
Marker at Osborne rest area, incorporating replica of Meades Ranch station marker disc