The Sloan Digital Sky Survey has created the most detailed three-dimensional maps of the Universe ever made, with deep multi-color images of one third of the sky, and spectra for more than three million astronomical objects.
Free Downloads and Links - ODBMS.ORG was created to serve faculty and students at educational and research institutions as well as OO software developers in the open source community or at commercial companies.
Community Maps is a mapping site for community groups that allows users to add their own information to the map. This can include local events, organisations, planning applications, history and local shops.
X. Ma, Z. Fu, Y. Jiang, M. Yang, and H. Stephen. International Journal of Computer Science and Information Technology (IJCSIT), 9 (3):
31 - 41(June 2017)
B. Martins, H. Manguinhas, and J. Borbinha. Proceedings of the International Conference on Semantic Computing, page 1--9. IEEE Computer Society, (August 2008)