ArcGIS Spatial Analyst adds a comprehensive set of advanced spatial modeling and analysis tools to the ArcGIS Desktop. Using ArcGIS Spatial Analyst, you can derive new information from your existing data, analyze spatial relationships, and build spatial models integrating core ArcGIS Desktop and ArcGIS Spatial Analyst tools. With ArcGIS Spatial Analyst you can

• Find suitable locations
• Find the best path between locations.
• Perform integrated raster/vector analysis
• Perform distance and cost-of-travel analyses
• Perform statistical analysis based on the local environment, small neighborhoods, or predetermined zones.
• Generate new data using simple image processing tools
• Interpolate data values for a study area based on samples
• Clean up a variety of data for further analysis or display.

Because ArcGIS Spatial Analyst is so strongly integrated with the ArcGIS Desktop geoprocessing environment, it is easier than ever to solve complicated analysis problems. Geoprocessing analysis models are not only easy to create and implement, but they are also self documenting, so anyone can quickly understand your spatial analysis process. Thousands of ArcGIS users are leveraging this modeling environment to take full advantage of their data and make better decisions