EPSG:CODE

ETRS89-GBR [OSNet v2009] to EWR3-IRF (1)

EPSG:11009 → EPSG:10849

Coordinate Reference Systems

Source CRS
EPSG:11009
ETRS89-GBR [OSNet v2009]
Geographic 2D
Target CRS
EPSG:10849
EWR3-IRF
Geographic 2D

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.

Frequently Asked Questions

What is the accuracy of the ETRS89-GBR [OSNet v2009] to EWR3-IRF transformation?

This is an exact transformation (EPSG:10850) with no loss of precision (0m accuracy) using the NTv2 method. Area of use: UK - Oxford to Cambridge.