The Spatial extension enhances the value of advanced tools and models created with the ArcGIS Spatial Analyst extension for ArcGIS Desktop by putting those resources to work in repeatable enterprise applications, improving productivity and increasing data analysis capacity for your organisation. You can deliver Web services for:
- Finding optimum locations and areas based on designated spatial criteria (suitability modeling
- Calculating distances and directions to closest resources
- Studying the flow of water across an area, creating stream networks, and delineating watersheds (hydrologic modeling)
- Creating maps showing the concentration of features across the landscape (density analysis)
- Utilising many other surface modeling techniques, such as calculating slope, aspect, and hillshade
If you're a registered user of ArcGIS Server, you can get a 60-day evaluation of the Spatial extension for free. The Spatial extension for ArcGIS Server requires ArcGIS Server Advanced edition.