ArcGIS Spatial Analyst provides a broad range of powerful spatial modeling and analysis features. With it you can

o Create, query, map, and analyze cell-based raster data.
o Perform integrated raster/vector analysis.
o Derive new information from existing data.
o Query information across multiple data layers.
o Fully integrate cell-based raster data with traditional vector data sources.

ArcGIS Spatial Analyst is integrated into the ArcGIS Desktop interactive mapping environment. This allows you to perform spatial analytical tasks such as