🌍 GEODETIC REFERENCE
Surveying in United States
NAD83 is the horizontal datum; the State Plane Coordinate System (SPCS) is standard for survey work. NGS is replacing NAD83/NAVD88 with the 2022 reference frames (NATRF2022 etc.).
National datum
NAD83 (2011)
Vertical datum
NAVD88
UTM zones
10N (West) through 19N (East), plus AK/HI
CORS stations (our DB)
2,263
CORS network
NOAA CORS Network (NCN) — NGS
Browse 2,263 United States CORS stations in our directory →Mapping authority
National Geodetic Survey (NGS / NOAA)
Projected coordinate systems & EPSG codes
NAD83 (2011) (geographic)EPSG:6318 →
State Plane (per state, many zones)multiple codes
NAD83 / UTM zones 10N-19Nmultiple codes