Data source: EPSG
Revision date: 1996-09-12
Scope: Geodesy, topographic mapping.
Remarks: Normal orthometric heights.
Definition: OGC Well Known Text
VERT_DATUM["National Geodetic Vertical Datum 1929",2005, AUTHORITY["EPSG","5102"]]
Definition: OGC Well Known Text 2 (2019)
VDATUM["National Geodetic Vertical Datum 1929", ID["EPSG",5102]]
Definition: ESRI Well Known Text
VDATUM["National_Geodetic_Vertical_Datum_1929"]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json", "type": "VerticalReferenceFrame", "name": "National Geodetic Vertical Datum 1929", "scope": "Geodesy, topographic mapping.", "area": "United States (USA) - CONUS onshore - Alabama; Arizona; Arkansas; California; Colorado; Connecticut; Delaware; Florida; Georgia; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Louisiana; Maine; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Montana; Nebraska; Nevada; New Hampshire; New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; Oklahoma; Oregon; Pennsylvania; Rhode Island; South Carolina; South Dakota; Tennessee; Texas; Utah; Vermont; Virginia; Washington; West Virginia; Wisconsin; Wyoming.", "bbox": { "south_latitude": 24.41, "west_longitude": -124.79, "north_latitude": 49.38, "east_longitude": -66.91 }, "id": { "authority": "EPSG", "code": 5102 } }