FOREWORD.

Every four year the International Association of Geodesy (IAG) publishes its reports for the past four year period, called the "Travaux de l’Association Internationale de Geodesie".

The "Travaux " is normally published shortly after the General Assembly of the International association of Geodesy held as a part of the General Assembly of the International Union of Geodesy and Geophysics (IUGG).

In light og the possible restructuring of the IAG within the upcoming two years, the IAG decided to publish a new version of the IAG Travaux covering reports for the past two years (1999-2001). The Travaux will be published in association with the IAG scientific Assembly in Budapest, Hungary, 2-8 september, 2001 so that scientific information can be disseminated rapidly throughout the geodetic community.

The Travaux is the complete collection of all the reports of all the bodies constituting the Association and in the current version it. This version of the Travaux is very successful in that it contains as many as 47 reports. Hereby this version of the Travaux is complete in the sense that all bodies of the IAG have reported.

Each of the 5 sections within the IAG has their own chapter in the Travaux. In these chapters the sections report on their commissions, services, special commissions, special study groups and working groups. Finally a number out of sections reports are found. In this version also meeting reports have been added to the Travaux.

It is an instantaneous picture of the work performed the last two years by a large number of individuals and groups through international coorporation under the auspices of the International Association of Geodesy.

I would like to thank all the contributors who did a very good job in collecting the individual reports of their sections. I would also like to thank Anne Louise Vest for her very fine work in preparing the individual documents in the Travaux for publication.

The IAG homepage on the Internet (www.gfy.ku.dk/~iag) is an open up-to-date forum for communication. Through this electronic address, all members of the IAG are now able to have almost real time access to all information related to the IAG. An electronic version of the "Travaux" can also be found here

Ole B. Andersen

TABLE OF CONTENTS                                                          TOP