EPSG Dataset :: v12.003

Geocentric translations (geog3D domain)

Coordinate Operation Method Details [VALID]

Name:

Geocentric translations (geog3D domain)

Code:

1035

Operation is Reversible:

Yes

Formula:

Note: These formulas have been transcribed from EPSG Guidance Note #7-2. Users are encouraged to use that document rather than the text which follows as reference because limitations in the transcription will be avoided.

Transformation of coordinates from one geographic coordinate reference system into another is often carried out as a concatenation of the following operations:

(geographical to geocentric) + (geocentric to geocentric) + (geocentric to geographic)

The Coordinate Frame Rotation (geog2D domain) transformation has 3 steps:

(i) geographic 3D coordinates are converted to geocentric coordinates using EPSG coordinate operation method code 9602;

(ii) the middle step of the concatenated transformation, from geocentric coordinates to geocentric coordinates, uses the Geocentric translations(geocentric domain) method, EPSG method code 1031;

(iii) finally the geocentric coordinates are converted to geographic 3D using EPSG coordinate operation method code 9602.

Example:

(For the geocentric step only). Given a three parameter datum shift from WGS 84 to ED50 for this North Sea area is given as
dX = +84.87m, dY = +96.49m, dZ = +116.95m.

The WGS84 geographical coordinates convert to the following WGS 84 geocentric values using
the above formulas for X, Y, Z:

XA = 3771 793.97m
YA = 140 253.34m
ZA = 5124 304.35m

Applying the given datum shifts to these, we obtain new geocentric values now related
to ED50:

XB = 3771 878.84m
YB = 140 349.83m
ZB = 5124 421.30m

Method
Parameters:

Parameter Name	Parameter Code	Sign reversal	Parameter Description
X-axis translation	8605	Yes	The difference between the X values of a point in the target and source coordinate reference systems.
Y-axis translation	8606	Yes	The difference between the Y values of a point in the target and source coordinate reference systems.
Z-axis translation	8607	Yes	The difference between the Z values of a point in the target and source coordinate reference systems.

Meta Data

Remarks:

See methods 1031 and 9603 for similar tfms operating between other CRSs types.

Information Source:

EPSG guidance note #7-2, http://www.epsg.org

Data Source:

EPSG

Revision Date:

November 29, 2022

Change ID:

[2009.083] [2020.125] [2022.084]

Alias:

Alias	Naming System	Remarks
Geocentric Translations	EPSG alias	This name is ambiguous as it makes no distinction of the domain of the source and target CRSs to which it is applied. See also methods 1031 and 9603.
Geocentric translations (geog3D domain)	EPSG alias

Wildcard	Example
% or *	Any wildcard characters
? or _	One wildcard character
[ - ]	[ - ] Range e.g. N[a-c] will return all geodetic objects that contains a string starting with the letter 'N' or 'n' followed by any of the letters contained within the range specified within the square bracket, e.g. letters a, b and c.
\|	Or e.g. E[a\|e]M will return all geodetic objects that contains a string starting with the letter E(e), ends with the letter M(m) and also contain either the letter a or letter e.