An overview of topo classes

The topo classes define the input data to be used in the creation of the interpolated surface raster. A topo class contains a list of input features and sometimes a field identifying the elevation values to use in the calculations.

TopoBoundary	Defines a list of feature classes containing polygons that represent the outer boundary of the output raster.
TopoContour	Defines a list of line feature classes that represent contours and the fields identifying their elevation values.
TopoLake	Defines a list of polygon feature classes that specify the location of lakes.
TopoPointElevation	Defines a list of point feature classes representing surface elevations and the fields identifying their elevation values.
TopoSink	Defines a list of point feature classes that represent the locations and magnitude of known topographic depressions and the fields identifying their elevation values.
TopoStream	Defines a list of line feature classes of stream locations.

Tools that use topo objects

Topo To Raster