A transformation is a conversion of coordinates from one coordinate system to another.

Why are coordinate transformations performed?

Coordinate transformations need to be done, for example, to be able to present different geographic data sets together, if they are not already given in the same coordinate system.

Lantmäteriet has developed the Gtrans software for coordinate transformations.

How do we use the term transformation?

Here, we use the term transformation for all operations where a set of coordinates is transferred from one coordinate system (source system) to a new set of coordinates in another coordinate system (target system).

The difference between conversions and empirical coordinate transformations

There are two types of coordinate transformations

  • Theoretically defined coordinate transformations, which are transformations within a reference system. Sometimes they are called conversions
  • Coordinate transformations with empirically determined parameter values, between two reference systems.

Read more about the differences here.


The coordinate transformation service can be used if you, for example, want to convert your GPS positions to a format compatible with the grid on Swedish maps.

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