ISO Geodetic Registry
The ISO Geodetic Registry is a structured database of coordinate reference systems and transformations that is accessible through this on-line registry system. The Register includes only systems and transformations of international application. It does not include all possible coordinate reference systems and transformations.
This Registry is provided under the auspices of ISO Technical Committee 211 on geographic information/geomatics and conforms to ISO standards ISO 19111:2007 (Spatial referencing by coordinates), the soon to be published ISO/TS 19127 (Geodetic register), ISO 19135:2005 (Procedures for item registration) and its soon to be published revision ISO 19135-1 (Procedures for item registration - Part 1: Fundamentals), and ISO 19135-2:2012 (Procedures for item registration -- Part 2: XML schema implementation).
The Registry also provides a web service interface, allowing geospatial software to query and retrieve information from the Register. Information on using the web services is available in the Registry user's guide.