By selecting this section the coordinate operation will perform a transformation with parameters.

Transformation type

It selects the type of the used transformation:
• 1D (on height);
• 2D (in plane):
• 3D (in space).

Transformation method

It selects the used transformation method. The contents of the list of available methods can be modified according to the type of the chosen transformation.

Information about the transformation methods can be found at Supported transformations and conversions - Table no.3: Transformations with parameters.

Button Load parameters from the EPSG database

It opens The window of loading parameters from the EPSG database. The data taken from an operation of type Transformation (2D and 3D) is: the transformation type, the method of transformation and the transformation parameters. Information about how the parameters are interpreted in some cases can be found when Accessing the EPSG database.

Transformation parameters

Parameters can be typed, loaded from a file or from the EPSG database or copied from another parameters box. The description of the buttons and of the contextual menu of the parameters group box can be found at The contextual menu of the parameters group box.

Parameters for forward transformation

Introduce the parameters of the selected transformation.

Use the following parameters for reverse transformation

This option becomes visible and can be used only for the transformations that are not reversible.

Check this option and introduce the parameters for the selected transformation to make the reverse transformation.