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JMap Server manages database connections by placing them in pools. The pools contain a certain number of open database connections. These connections are shared with the entire system and used according to database access needs.

All the database connection pools (hereafter called databases for simplicity) are centrally managed using JMap Admin. Databases are typically used by JMap Server to read spatial data stored in tables and to access descriptive data related to spatial data. Once databases are configured in JMap Admin, they can be used from other sections and for various purposes in the administration process.

The Databases section in JMap Admin is used to display a table of existing databases and to show their statuses.

System Database

JMap has a System database that contains JMap Server's configurations and geometry tables. This database is mandatory and generally should not be modified. It cannot be deleted and should only be manipulated by advanced users. See section JMap Server System Database for more information.