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A transformation is a conversion of co-ordinates from one co-ordinate system to another.

In this context the term transformation can be generally used for all functions where one set of co-ordinates is mathematically converted from one co-ordinate system – the From (source) system – to another set of co-ordinates in another co-ordinate system – the To (destination) system. Lantmäteriet has developed a software package, Gtrans, for co-ordinate transformations.

A distinction is made between defined transformation relationships, conversions, and empirical relationships which are the result of fitting between two different systems.

You can do co-ordinate transformations interactively, using the Co-ordinate transformation service.

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