EPSG:CODE

ETRS89-GBR [OSNet v2009] to ETRS89-GBR [OSNet v2009] + LSG height (1)

EPSG:11008 → EPSG:10997

Coordinate Reference Systems

Source CRS
EPSG:11008
ETRS89-GBR [OSNet v2009]
Geographic 3D
Target CRS
EPSG:10997
ETRS89-GBR [OSNet v2009] + London Survey Grid height
Compound

Remarks

Reversible alternative to ETRS89-GBR [OSNet v2009] to LSG height (1) (code 10990). File LSGGM2025_W.grd covers areas west of the Greenwich meridian, with complimentary file LSGGM2025_E.grd covering east of the meridian. The full grid is available in a single file in each of Leica, Topcon and Trimble formats.

Frequently Asked Questions

What is the accuracy of the ETRS89-GBR [OSNet v2009] to ETRS89-GBR [OSNet v2009] + London Survey Grid height transformation?

This is an exact transformation (EPSG:10998) with no loss of precision (0m accuracy) using the Geog3D to Geog2D+GravityRelatedHeight (EGM) method. Area of use: UK - Greater London.