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Sample Data are stored in a relational database.
A perl script is run to retrieve events located in a region defined by ra_max, dec_max, ra_min,dec_min. (typically 2x2 degrees).
The time spent by the query as well as the number of events found are kept.
The query is launched 100 times, statistics are output.

See also:

• the Astrogrid DataDocs page.
• Pat Nolan's report

Posgresql

Postgresql, since a long time, has implemented geospatial features.

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