Source data are available in a grid (see @@grid@@).
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To define a transformation :
<ul>
	<li>select a source frame and a destination frame</li>
	<li>select the time field if needed (see @@time@@)</li>
	<li>select vector list in which you want to apply the transformation (see @@vectors@@)</li>
</ul>
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If source frame and destination frame are the same, no transformation will be done. Under this condition, the vector list can be empty.
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To validate the definition, click "Next" button on the bottom tool bar.
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