Available with Spatial Analyst license.
Before you begin to perform analysis, it is important to understand the geoprocessing analysis environment within which you are working. The analysis environment includes the workspace into which results will be placed and the extent, cell size, and coordinate system of results.
When running geoprocessing tools, you can specify environment settings for your project via the Environments window. You can override the default settings of the environments at various levels. Each tool dialog has an Environments tab that allows you to override application-level settings.
Some environments are conditionally supported, depending on the input format, output format, settings made in the parameters for a tool, and specific behaviors for that tool.
For more information about the specific environments that influence the analysis, see Analysis environments and Spatial Analyst.