How To: Clip a grid with ArcView 3.x and Spatial Analyst
Clipping, extracting and/or subsetting grid data can be accomplished using the Spatial Analyst extension in ArcView 3. The most effective procedure is to set up an Analysis Extent. Here are two methods for specifying an Analysis Extent.
The steps below can be used in ArcView GIS 3.x to clip a grid with another theme's extent. The theme being clipped can be from any data source, such as anything on a map. ArcView Spatial Analyst extension is required.