To create a subset

You can select a feature class and create an expression that specifies a subset of the feature class.

Note: See Use Expressions to learn more about creating expressions.

1. If you are filtering by location, zoom the model to the extents of the feature class or data source.
2. Click in the Utility Bar.
3. In the Model Explorer panel, for the feature class to filter, click .
4. In the Create New Subset dialog box, create one of the following expression types:
   • Simple Filter: Specifies a property, an operator, and a value. For example, ROOF_HEIGHT > 24. The subset defined by that expression includes only buildings whose roof height value is more than 24 feet.
   • Multiple-Condition Filter: Combines two or more simple filters. For example, ROOF_HEIGHT > 24 AND ROOF_MATERIAL = 'Roofing:Copper_Tile_Medium'. The subset defined by that expression includes only buildings whose roof height value is more than 24 feet and that also have medium copper tile roofs.

     For information on creating either of these types of expressions, see Evaluating Properties.

   • Location Filter: Specifies an area in the model. Features within this area are included in the subset, while those outside the area are not. For example, you can include features within a circle that you draw in the model. For information on this type of expression, see Filtering by Location.
5. When you have finished defining the subset, click OK to apply the filter. InfraWorks runs validation to check the syntax of the expression. If validation finds an error, an error message will display in the bottom of the Expression Area.

   To redefine the expression for this subset later, right-click the subset and click Edit Subset. To make a copy of the subset (and its expression), right-click the subset and click Copy Subset. You can then edit the copy.

6. In Model Explorer, enter a name for the subset.

   To rename the subset later, right-click it and click Rename Subset.