This has led to the development of global ellipsoid models such as WGS72, GRS80, and WGS84 (current). The Global Positioning System (GPS) references theWorld Geodetic System (WGS84)as its coordinate reference system. Never before have we been able to estimate the ellipsoid with such precision...
NAD83 (NSRS 2007, 2011): National Spatial Reference System and current survey standard using multi-year adjusted locations based on GNSS from the CORS. What’s Next? A New Horizontal Datum in 2022 Surveyors, mappers, and anyone in the geography profession use NAD27, NAD83, and WGS84 as ...