The overall task of BGI is to collect, on a world-wide basis, all measurements and pertinent information about the Earth gravity field, to compile them and store them in a computerized data base in order to redistribute them on request to a large variety of users for scientific purposes.
See Terms & References:
IAG Geodesist’s Handbook 2016 (PDF – full open access)
IAG Geodesist’s Handbook 2012 (PDF – full open access)
IAG Structure 2007-2011 (PDF – H. Drewes Ed., Journal of Geodesy, 82, 11, 2008).
Link to IAG Office webpage : http://www.iag-aig.org