Prof. Dr. rer. nat. Thomas H. Kolbe
Institute for Geodesy and Geoinformation Science
Technical University Berlin
Straße des 17. Juni 135
10623 Berlin, Germany
Phone: +49 (0)30 / 314-23274
EMail: kolbe(at)igg.tu-berlin.de

(Speaker of the SIG 3D of the GDI NRW and
vice-chair of the OGC CityGML Standards Working Group)

PD Dr. Gerhard Gröger
Institute for Geodesy and Geoinformation
University of Bonn
Meckenheimer Allee 172
53115 Bonn, Germany
Phone: +49 (0)228 / 73-1764
EMail: groeger(at)ikg.uni-bonn.de

(Speaker of the Modeling Group of the SIG 3D)

Carsten Rönsdorf
Ordnance Survey UK
Romsey Road
Southampton SO16 4GU, United Kingdom
Phone: +44 (0)23 / 8030-5733
EMail: Carsten.Roensdorf(at)ordnancesurvey.co.uk

(Chair of the OGC CityGML Standards Working Group)