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Name: ETRS89 to EWR3-IRF (1)
Method: NTv2
Grid Files: TN15-ETRS89-to-EWR3-IRF.gsb
Remarks: In conjunction with the EWR3-TM map projection (code 9765) applied to EWR3-IRF (code 10849), emulates the EWR3 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009 CORS) defines EWR3-IRF hence is errorless. In 2024 the EWR2 Grid (ETRS89 / EWR2 SnakeGrid) was extended eastwards as the EWR3 Grid (ETRS89 / EWR3 SnakeGrid). To the west of Bedford the EWR2 Grid is an exact subset of the EWR3 Grid; over this extent the EWR3 Grid replaces the EWR2 Grid. The EWR2 emulation file TN15-ETRS89-to-EWR2-IRF.gsb (CT code 9764) is a subset of this EWR3 emulation file TN15-ETRS89-to-EWR3-IRF.gsb; west of Bedford the content of the two files is identical.
Information source: Network Rail.
Revision date: 2025-05-05
Unit: degree
Geodetic CRS: ETRS89
Datum: European Terrestrial Reference System 1989 ensemble
Data source: EPSG
Information source: OGP
Revision date: 2002-11-22
Scope: Geodesy.
Remarks: See CRS code 4258 for recommended coordinate axis representation for the human interface.
Area of use: Europe - onshore and offshore - ETRF extent - approximately 16°W to 33°E and 33°N to 84°N.
Coordinate system: Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: dec deg
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