EPSG:CODE

EPSG:7406 — NAD27 + NGVD29 height (ftUS)

Compound · USA - CONUS - onshore

Export Formats

OGC WKT
COMPD_CS[
    "NAD27 + NGVD29 height (ftUS)",
    GEOGCS[
        "NAD27",
        DATUM[
            "North_American_Datum_1927",
            SPHEROID["Clarke 1866",6378206.4,294.978698213898,AUTHORITY["EPSG","7008"]],
            AUTHORITY["EPSG","6267"]
        ],
        PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4267"]
    ],
    VERT_CS[
        "NGVD29 height (ftUS)",
        VERT_DATUM[
            "National Geodetic Vertical Datum 1929",
            2005,
            AUTHORITY["EPSG","5102"]
        ],
        UNIT["US survey foot",0.304800609601219,AUTHORITY["EPSG","9003"]],
        AXIS["Gravity-related height",UP],
        AUTHORITY["EPSG","5702"]
    ],
    AUTHORITY["EPSG","7406"]
]

Frequently Asked Questions

How do I add EPSG:7406 to GeoServer?

Add the following definition to your GeoServer configuration: 

7406=COMPD_CS["NAD27 + NGVD29 height (ftUS)",GEOGCS["NAD27",DATUM["North_American_Datum_1927",SPHEROID["Clarke 1866",6378206.4,294.978698213898,AUTHORITY["EPSG","7008"]],AUTHORITY["EPSG","6267"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4267"]],VERT_CS["NGVD29 height (ftUS)",VERT_DATUM["National Geodetic Vertical Datum 1929",2005,AUTHORITY["EPSG","5102"]],UNIT["US survey foot",0.304800609601219,AUTHORITY["EPSG","9003"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5702"]],AUTHORITY["EPSG","7406"]]
Read the full GeoServer guide →

How do I add EPSG:7406 to PostGIS?

Add the following definition to your PostGIS configuration: 

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (7406, 'EPSG', 7406, '+proj=longlat +datum=NAD27 +vunits=us-ft +no_defs +type=crs', 'COMPD_CS["NAD27 + NGVD29 height (ftUS)",GEOGCS["NAD27",DATUM["North_American_Datum_1927",SPHEROID["Clarke 1866",6378206.4,294.978698213898,AUTHORITY["EPSG","7008"]],AUTHORITY["EPSG","6267"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4267"]],VERT_CS["NGVD29 height (ftUS)",VERT_DATUM["National Geodetic Vertical Datum 1929",2005,AUTHORITY["EPSG","5102"]],UNIT["US survey foot",0.304800609601219,AUTHORITY["EPSG","9003"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5702"]],AUTHORITY["EPSG","7406"]]');
Read the full PostGIS guide →

How do I add EPSG:7406 to MapServer?

Add the following definition to your MapServer configuration: 

PROJECTION
  "+proj=longlat"
  "+datum=NAD27"
  "+vunits=us-ft"
  "+no_defs"
  "+type=crs"
END
Read the full MapServer guide →

How do I use EPSG:7406 with Proj4js?

Add the following definition to your Proj4js configuration: 

proj4.defs("EPSG:7406", "+proj=longlat +datum=NAD27 +vunits=us-ft +no_defs +type=crs");
Read the full Proj4js guide →