Coordinate transformations to Lao 1997

The EPSG Geodetic Parameter Dataset defines official transformations from 2 coordinate reference systems to Lao 1997 (EPSG:4678). Each page lists the published parameters, accuracy and area of use, with a free in-browser converter.

• Lao 1993 → Lao 1997±0.15 m
• Vientiane 1982 → Lao 1997±2 m