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**Recode** is a post-classification tool that reassigns class values in a thematic raster. You enter the classified image, then renumber the *New Value* column to merge or rename classes (e.g., collapse three forest subclasses into one "Forest" class). - **Use after** a classification run to simplify the final map. - **Available in ERDAS Imagine** under *Raster → Thematic → Recode* (older: *Interpreter → GIS Analysis → Recode*).

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