Do I need 3D data to use ArcGIS 3D Analyst?
No, ArcGIS 3D Analyst can use all the data sets supported by ArcGIS. If your data does not have explicit three-dimensional coordinates, you can drape it on other surface data, such as a digital elevation model (DEM), or you can extrude the features in a 3D thematic representation, (e.g., sales districts extruded by sales with the height representing the amount of sales).
