Levallois medal was established by IAG in 1979, to honour the former Secretary General and his outstanding contributions to IAG. The award is made in recognition of distinguished service to the Association, and/or to the science of geodesy in general. During IAG 1995 the Levallois medal was awarded to Professor Willem Baarda. Prof. Baarda worked for several decades at the Technical University at Delft, Netherlands, and the results of his research strongly influenced geodesy.
The contributions of Baarda were;
- he was the first to develop a systematic framework of statistical quality control, including the famous "data snooping".
- he also firstly introduced criterion matrices for testing a network precision, and invented the reliability concept, now at widespread use.
- finally, the invention of the S-transformations, nowadays employed at "free network" adjustments.
Some of Prof. Baarda's publications from the 1960's and 1970's belong to the fundamental literature in geodesy. Most recently (in 1995) a new basic publication from Prof. Baarda was highlighted, related to the coupling and interaction between geometric and physical geodesy.
Between 1979 and 1991, the award was given to Charles Whitten (USA), Rudolf Sigl (Germany), Arne Bjerhammar (Sweden), and Paul Melchior (Belgium).
Baarda - b.1917;d.2005
(1982 photo)
photo 2003
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