An overview of the Functional Surface toolset

The following table lists the tools in the Functional Surface toolset and a brief description of each.

Tool	Description
Add Surface Information	Interpolates surface elevation properties for point, multipoint, and polyline features.
Interpolate Shape	Interpolates z-values for a feature class based on elevation derived from a raster, triangulated irregular network (TIN), or terrain dataset.
Line Of Sight	This tool uses an input 2D or 3D polyline feature class along with a raster, triangulated irregular network (TIN), or terrain dataset surface to determine visibility between observer and target points. A multipatch feature class can optionally be supplied to participate in the visibility analysis.
Surface Volume	Calculates the area and volume of a raster, triangulated irregular network (TIN), or terrain dataset surface above or below a given reference plane.

Overview table of Functional Surface tools

The following tools that were available in the ArcGIS 3D Analyst toolbox prior to version 10.0 have been removed, since they have been replaced by the more capable Add Z Information geoprocessing tool.

Geoprocessing Tool	Recommendation
Surface Length	Use the Add Z Information tool to calculate the surface length of each line input line feature based on a surface.
Surface Spot	Use the Add Z Information tool to add surface values for each point of a point feature class based on a surface.