ArcView Spatial Analyst The ArcView Spatial Analyst extension adds an entirely new dimension to desktop mapping and GIS analysis by making sophisticated spatial analysis and visualization tools easily accessible through ArcView . The Spatial Analyst enables desktop GIS users to create, query, and analyze cell-based raster maps; derive new information from existing data; query information across multiple data layers; and fully integrate cell-based raster data with traditional vector data sources. Cell-based raster data sets, or grids, are especially suited to representing traditional geographic phenomena that vary continuously over space such as elevation, slope, precipitation and so on, and can also be used to represent less traditional types of information such as population density, consumer behavior, and other demographic characteristics. Grids are also the ideal data representation for spatial modeling and analysis of flows and trends over data represented as continuous surfaces such as hydrologic modeling or the dynamics of population change over time. The combination of these spatial analysis and visualization tools for raster-based data with ArcView's vector based spatial operators brings unprecedented seamless analysis, modeling, visualization, and mapping capabilities to your organization in an affordable desktop package. The Spatial Analyst extension provides quick access to fundamental raster data creation and modeling capabilities such as surface generation (conversion of feature themes to grid themes from your existing data sources), surface analysis (create buffers of distance from features, determine the proximity to a feature, derive density surfaces, and perform site suitability analysis), terrain modeling (slope, aspect, hill shade, watershed delineation, visibility), and contouring. Integrating these tools directly into ArcView's graphical user interface means that users can quickly and easily leverage these key spatial operations with just a few mouse clicks. Additional capabilities available through the standard user interface include queries on multiple grid themes, neighborhood and zone analysis, grid classification and display, summary histograms, and more. Requirements: Multi-platform design for portability (MS Windows 95/98, Windows NT 4.0, Windows NT 3.51 with ArcView 3.0a only, Digital UNIX Version 4.0 or higher, Hewlett-Packard 700 and 800 series HP-UX version 10.20 or higher, IBM RS/6000 AIX version 4.1.4.0 or higher, SGI IRIX version 6.2 or higher, Sun Solaris 2.5 or higher).    Buy now! Click here for MapMart Internet pricing. NOTE: Volume discounts available. Contact us by email or phone for details.