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# Topic: classification

| Tool | Description |
|--------|-------------|
| [i.cluster](i.cluster.md) | Generates spectral signatures for land cover types in an image using a clustering algorithm. The resulting signature file is used as input for i.maxlik, to generate an unsupervised image classification. |
| [i.gensig](i.gensig.md) | Generates statistics for i.maxlik from raster map. |
| [i.gensigset](i.gensigset.md) | Generates statistics for i.smap from raster map. |
| [i.maxlik](i.maxlik.md) | Classifies the cell spectral reflectances in imagery data. Classification is based on the spectral signature information generated by either i.cluster, g.gui.iclass, or i.gensig. |
| [i.signatures](i.signatures.md) | Manage imagery classification signature files |
| [i.smap](i.smap.md) | Performs contextual image classification using sequential maximum a posteriori (SMAP) estimation. |
| [v.class](v.class.md) | Classifies attribute data, e.g. for thematic mapping |

*See also the corresponding keyword for additional references:*

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