APREF – Asia-Pacific Reference Frame

APREF (Asia-Pacific Reference Frame) maintains the regional densification of the ITRF for the Asia-Pacific region. It combines GNSS data from regional stations to ensure precise and consistent positioning. APREF supports scientific, mapping, and disaster-monitoring applications in the region.

More Info: https://www.ga.gov.au/scientific-topics/positioning-navigation/geodesy/asia-pacific-reference-frame