WGS 84 to EGM96 height (1) - EPSG:10084 (2024)

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  • OGC WKT 2
  • PROJ.4
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  • JSON
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  • Mapnik
  • PostGIS

Definition: OGC Well Known Text 2 (2019)

COORDINATEOPERATION["WGS 84 to EGM96 height (1)", VERSION["NGA-World"], SOURCECRS[ GEOGCRS["WGS 84", ENSEMBLE["World Geodetic System 1984 ensemble", MEMBER["World Geodetic System 1984 (Transit)"], MEMBER["World Geodetic System 1984 (G730)"], MEMBER["World Geodetic System 1984 (G873)"], MEMBER["World Geodetic System 1984 (G1150)"], MEMBER["World Geodetic System 1984 (G1674)"], MEMBER["World Geodetic System 1984 (G1762)"], MEMBER["World Geodetic System 1984 (G2139)"], ELLIPSOID["WGS 84",6378137,298.257223563, LENGTHUNIT["metre",1]], ENSEMBLEACCURACY[2.0]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[ellipsoidal,3], AXIS["geodetic latitude (Lat)",north, ORDER[1], ANGLEUNIT["degree",0.0174532925199433]], AXIS["geodetic longitude (Lon)",east, ORDER[2], ANGLEUNIT["degree",0.0174532925199433]], AXIS["ellipsoidal height (h)",up, ORDER[3], LENGTHUNIT["metre",1]], ID["EPSG",4979]]], TARGETCRS[ VERTCRS["EGM96 height", VDATUM["EGM96 geoid"], CS[vertical,1], AXIS["gravity-related height (H)",up, LENGTHUNIT["metre",1]], ID["EPSG",5773]]], METHOD["Geographic3D to GravityRelatedHeight (EGM)", ID["EPSG",9661]], PARAMETERFILE["Geoid (height correction) model file","WW15MGH.GRD"], OPERATIONACCURACY[1.0], USAGE[ SCOPE["Derivation of gravity-related heights from GNSS observations."], AREA["World."], BBOX[-90,-180,90,180]], ID["EPSG",10084], REMARK["Replaces WGS 84 to EGM84 height (1) (CT 15781). Replaced by WGS 84 to EGM2008 height (1) and (2) (CTs 3858-59). For reversible alternative see WGS 84 to WGS 84 + EGM96 height (1) (CT 9708). An executable using spherical harmonics is also available."]]

Definition: PROJ.4

+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=us_nga_egm96_15.tif +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:10084","+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=us_nga_egm96_15.tif +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1");

Definition: JSON

{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "Transformation", "name": "WGS 84 to EGM96 height (1)", "source_crs": { "type": "GeographicCRS", "name": "WGS 84", "datum_ensemble": { "name": "World Geodetic System 1984 ensemble", "members": [ { "name": "World Geodetic System 1984 (Transit)", "id": { "authority": "EPSG", "code": 1166 } }, { "name": "World Geodetic System 1984 (G730)", "id": { "authority": "EPSG", "code": 1152 } }, { "name": "World Geodetic System 1984 (G873)", "id": { "authority": "EPSG", "code": 1153 } }, { "name": "World Geodetic System 1984 (G1150)", "id": { "authority": "EPSG", "code": 1154 } }, { "name": "World Geodetic System 1984 (G1674)", "id": { "authority": "EPSG", "code": 1155 } }, { "name": "World Geodetic System 1984 (G1762)", "id": { "authority": "EPSG", "code": 1156 } }, { "name": "World Geodetic System 1984 (G2139)", "id": { "authority": "EPSG", "code": 1309 } } ], "ellipsoid": { "name": "WGS 84", "semi_major_axis": 6378137, "inverse_flattening": 298.257223563 }, "accuracy": "2.0", "id": { "authority": "EPSG", "code": 6326 } }, "coordinate_system": { "subtype": "ellipsoidal", "axis": [ { "name": "Geodetic latitude", "abbreviation": "Lat", "direction": "north", "unit": "degree" }, { "name": "Geodetic longitude", "abbreviation": "Lon", "direction": "east", "unit": "degree" }, { "name": "Ellipsoidal height", "abbreviation": "h", "direction": "up", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 4979 } }, "target_crs": { "type": "VerticalCRS", "name": "EGM96 height", "datum": { "type": "VerticalReferenceFrame", "name": "EGM96 geoid" }, "coordinate_system": { "subtype": "vertical", "axis": [ { "name": "Gravity-related height", "abbreviation": "H", "direction": "up", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 5773 } }, "method": { "name": "Geographic3D to GravityRelatedHeight (EGM)", "id": { "authority": "EPSG", "code": 9661 } }, "parameters": [ { "name": "Geoid (height correction) model file", "value": "WW15MGH.GRD", "id": { "authority": "EPSG", "code": 8666 } } ], "accuracy": "1.0", "scope": "Derivation of gravity-related heights from GNSS observations.", "area": "World.", "bbox": { "south_latitude": -90, "west_longitude": -180, "north_latitude": 90, "east_longitude": 180 }, "id": { "authority": "EPSG", "code": 10084 }, "remarks": "Replaces WGS 84 to EGM84 height (1) (CT 15781). Replaced by WGS 84 to EGM2008 height (1) and (2) (CTs 3858-59). For reversible alternative see WGS 84 to WGS 84 + EGM96 height (1) (CT 9708). An executable using spherical harmonics is also available."}

Definition: MapServer - MAPfile

PROJECTION"proj=pipeline""step""proj=axisswap""order=2,1""step""proj=unitconvert""xy_in=deg""xy_out=rad""step""inv""proj=vgridshift""grids=us_nga_egm96_15.tif""multiplier=1""step""proj=unitconvert""xy_in=rad""xy_out=deg""step""proj=axisswap""order=2,1"END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?><Map srs="+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=us_nga_egm96_15.tif +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1"><Layer srs="+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=us_nga_egm96_15.tif +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1"></Layer></Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 10084, 'EPSG', 10084, '+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=us_nga_egm96_15.tif +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1', 'None');
WGS 84 to EGM96 height (1) - EPSG:10084 (2024)

FAQs

What is the difference between WGS84 and EGM96? ›

WGS84 approximates Earth by an elipsoid, which is basically a deformed sphere. EGM96 is a more complex model based on the gravitational force of the Earth (which is not constant) that defines what "sea level" or "up/down" mean, a smooth but irregular shape called "geoid".

What is the EPSG datum for WGS84? ›

The WGS84 Coordinate Systems adds Greenwich as the starting point (prime meridian) for the longitude (0°) and sets the units in degrees (°). This coordinate system also has a unique reference code, the so-called EPSG code, which is 4326.

How accurate is WGS84? ›

At inception, WGS84 provided positional accuracy in the order of one to two metres. Over time, the datum has been mathematically refined and the input parameters revised to reflect new gravitational models, improving resultant accuracies to mere centimetres.

Is EGM96 a vertical datum? ›

We would recommend you to convert the coordinates of the flight with the WGS 84 coordinates to the egm 96 vertical coordinate system. To do so, you can just add the N value (difference between the ellipsoid WGS84 and the geoid 96; varies between 30-100 meters depending on the location).

What is WGS84 good for? ›

The World Geodetic System 1984 (WGS 84) is a 3-dimensional coordinate reference frame for establishing latitude, longitude and heights for navigation, positioning and targeting for the DoD, IC, NATO, International Hydrographic Office and the International Civil Aviation Organization.

How accurate is EGM96? ›

EGM96 model is used to compute geoid undulations accurate to better than one meter (with the exception of areas void of dense and accurate surface gravity data) with reference to WGS84 ellipsoid.

What is the difference between WGS and EPSG? ›

Reference System: EPSG 4326 provides a full coordinate reference system, adding depth to the otherwise simple pairs of numbers. WGS84, in some contexts, can refer just to the ellipsoid. Database vs. Datum: WGS84 is a datum, a reference from which measurements are made.

Is WGS84 a projection or datum? ›

The World Geodetic System 1984 (WGS84) is a global datum, used for determining positions on the Earth's surface. The WGS84 is a reference system used by the satellite navigation systems like GPS and is used in various mapping applications.

Is Google Maps in WGS84? ›

(Google uses the World Geodetic System WGS84 standard.) World coordinates, which reference a point on the map uniquely.

What datum does Google Earth use? ›

Google Maps and Microsoft Virtual Earth use a Mercator projection based on the World Geodetic System (WGS) 1984 geographic coordinate system (datum). This Mercator projection supports spheres only, unlike the ESRI Mercator implementation, which supports spheres and ellipsoids.

Is WGS84 in meters or feet? ›

By default the UTM zones are always in meters. This is because Hydromagic uses the EPSG database which does not include definitions for UTM zones in International Feet or U.S. Survey Feet.

Should I use NAD83 or WGS84? ›

NAD83 can be used for GPS applications where high precision is not so critical, and WGS84 can be used for mapping in North America. However, it might not provide the same local accuracy as NAD83.

What vertical datum should I use? ›

In the United States, prominent vertical datums in use by professionals include the National Geodetic Vertical Datum of 1929 and the North American Vertical Datum of 1988.

What is the resolution of EGM96? ›

The raster from EGM96 is provided at 15'x15' resolution.

What is egm level? ›

So, scientists came up with Earth Gravitational model (EGM) which gave us a standard to. measure elevation of a place above or below mean sea level. GNSS uses it to give the. elevation of a place on surface of earth.

Does Google Maps use WGS84? ›

The Maps JavaScript API uses the following coordinate systems: Latitude and longitude values, which reference a point on the world uniquely. (Google uses the World Geodetic System WGS84 standard.) World coordinates, which reference a point on the map uniquely.

What is the meaning of WGS84? ›

The World Geodetic System 1984 (WGS84) is a global datum, used for determining positions on the Earth's surface. The WGS84 is a reference system used by the satellite navigation systems like GPS and is used in various mapping applications.

What is the difference between WGS84 and universal transverse Mercator? ›

Both examples are coordinate systems. The difference is that WGS 84 is a geographic coordinate system, and UTM is a projected coordinate system. Geographic coordinate systems are based on a spheroid and utilize angular units (degrees).

What is the EGM96 model of the Earth? ›

The Earth Gravitational Model 1996 (EGM 96) is a spherical harmonic expansion of the Earth's gravitational potential field.

References

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