EPSG Dataset :: v12.003

Geographic2D offsets

Coordinate Operation Method Details [VALID]

Name:

Geographic2D offsets

Code:

9619

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.

Lat_T = Lat_S + latitude_offset
Lon_T = Lon_S + longitude_offset.

Example:

A position with coordinates of 38°08'36.565"N, 23°48'16.235"E referenced to the old Greek geographic 2D coordinate reference system (EPSG CRS code 4120) is to be transformed to the newer GGRS87 system (EPSG CRS code 4121). Transformation parameters from Greek to GGRS87 are:
dLat = -5.86"
dLon = +0.28"

Then Lat(GGRS87) = 38°08'3656 5" N (5.8 6") = 38°08'30.705"N
and Lon(GGRS87) = 23°48'16.23 5"E + 0. 28" = 23°48'16.515"E

For the reverse transformation for the same point,
Lat(GREEK) = 38°08'30.705 " N + 5. 86" = 38°08'36.565"N
Lon(GREEK) = 23°48'16.515" E + (-0. 28 ") = 23°48'16.235"E

Method
Parameters:

Parameter Name	Parameter Code	Sign reversal	Parameter Description
Latitude offset	8601	Yes	The difference between the latitude values of a point in the target and source coordinate reference systems.
Longitude offset	8602	Yes	The difference between the longitude values of a point in the target and source coordinate reference systems.

Meta Data

Remarks:

This transformation allows calculation of coordinates in the target system by adding the parameter value to the coordinate values of the point in the source system.

Information Source:

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

Data Source:

EPSG

Revision Date:

June 13, 2017

Change ID:

[1999.79] [2004.33] [2017.018]

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.