| Input 3D Cross-Section | Required | Input | Feature Layer | 3D Polylines - polyline with Z property |
| Thinning Method | Required | Input | String | Operation Type:FractionOfVertices = fraction of vertices left after the thinning operation, between 0 and 1MaxNumberOfVertices = max number of vertices left after the thinning operation |
| Max Number/Fraction of Vertices | Required | Input | Double | Fraction of vertices left after the thinning operation, between 0 and 1 when Thinning Method = FractionOfVerticesmax number of vertices left after the thinning operation when Thinning Method = MaxNumberOfVertices |
| Output 3D Simplified Cross-Section | Required | Output | Feature Class | Output polyline feature layer after the thinning operation |
| Output Thinning Report FeatureLayer | Required | Output | Feature Class | Output point feature class storing the vertices of the operation polyline. |