working group III/4 'Automated Object Extraction' for the XX. ISPRS Congress, 12 - 23 July 2004, Istanbul, Turkey. Please note, that the deadline for abstracts is as early as 20 September 2003 For submission as well as for registration and further information please use the web site http://www.isprs2004-istanbul.com Further important dates Deadline early fee 01 December 2003 Deadline of applications for Fellowships to support Congress Expenses 31 December 2003 Notification of authors 01 January 2004 Deadline for registration to Tutorials and Workshops 30 April 2004 Deadline for submission of full papers 30 April 2004 Deadline guaranteed hotel reservations 15 June 2004