| Oracle® Database PL/SQL Packages and Types Reference 11g Release 1 (11.1.) Part Number B28419-02  | 
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The SDO_CS package contains functions and procedures for working with coordinate systems. You can perform explicit coordinate transformations on a single geometry or an entire layer of geometries (that is, all geometries in a specified column in a table).
For a complete description of this package within the context of Oracle Spatial, see SDO_CS in the Oracle Spatial Developer's Guide.