Now that you have selected the commercial properties that are the required size and that are near the city's sewer system, it is time to calculate how much area of each of those parcels is within the floodplain. To do that, you will use the Union geoprocessing tool to union the new layer that you just created with the floodplains.
This will create a new layer that will split each commercial property into the part that is in the floodplain and the part that isn't:
- Using the skills that you have already learned, open the attribute tables for both the CommercialProp_near_sewer and Floodplains layers. Take a moment to review what fields are located in each table and some of the values that they contain. This will help you understand the results produced by the Union tool.
- Close the tables.
- Click on the Analysis tab in the ribbon. ...