1103 
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B4. Beijing 2008 
http://www.whitehouse.gov/omb/circulars/aO 16/print/aO 16_rev. 
html (accessed 21 Apr. 08) 
Groot R. and McLaughlin J., 2000, Geospatial Data 
Infrastructure: Concepts, Cases and Good Practice, New York: 
Oxford University Press. 
Li L., Chen A., Bai Y., Wei Y., 2006, Implementation of 
Geospatial Product Virtualization in Grid Environment, 
NASA's Earth Science Technology Office (ESTO) Conference 
- ESTC 
Masser I., 2005, GIS Worlds - Creating Spatial Data 
Infrastructures, ESRI Press. 
Mondini M., 2006, La realizzazione di soluzioni interoperabili 
in una spatial data infrastructure, X° Conferenza Nazionale 
ASITA, Bolzano, Italy 
Nebert D., 2004, Developing Spatial Data Infrastructures: The 
SDI Cookbook, Version 2.0, Global Spatial Data Infrastructure 
Association. http://www.gsdi.org/gsdicookbookindex.asp 
(accessed 21 Apr. 08) 
UNGIWG, 2007, STRATEGY for developing and 
implementing a United Nations Spatial Data Infrastructure in 
support of Humanitarian Response, Economic Development, 
Environmental Protection, Peace and Safety. 
http://www.ungiwg.org/docs/unsdi/UNSDI_Strategy_Implemen 
tation_Paper.pdf (accessed 21 Apr. 08) 
UNGIWG, 2007, UNSDI COMPENDIUM. A UNSDI Vision, 
Implementation Strategy and Reference Architecture. 
http://www.ungiwg.org/docs/unsdi/UNSDI_Compendium_13_0 
2_2007.pdf (accessed 21 Apr. 08) 
Zwicker C., Pierce B., 2007, Geodatabase - An Introduction, 
ESRI International User Conference