Coordinate transformations to IGN 1988 LS height

The EPSG Geodetic Parameter Dataset defines official transformations from 2 coordinate reference systems to IGN 1988 LS height (EPSG:5616). Each page lists the published parameters, accuracy and area of use, with a free in-browser converter.

• RGAF09 → IGN 1988 LS height±0.1 m
• RRAF 1991 → IGN 1988 LS height±0.2 m