Learning ArcGIS Pro

When the Copy Features tool completes, a new layer is added to your map that
contains only those commercial parcels you had selected. If you have features
selected in a map or table, most geoprocessing tools will automatically only use those
selected records within that tool.
7. Open the Attribute table for the CommercialProp_near_sewer layer that was just
added to your map.
8. Verify the table contains the same number of records as you had selected previously.
It should be approximately 18.
9. Clear your selection by clicking on the Clear button in the Selection group on the
MAP tab.
10. Close the table.
11. Turn off the sewer lines, sanitary sewer manholes, sewer_line_Buffer, and
Commercial Properties 1 to 3 AC layers. You do not need to see those for the rest
of your analysis. They might cause confusion.
12. Save your project.
Step 3 – determining how much of each commercial property is in the
floodplain
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 union the new layer 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 that which is not:
1. Using skills 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 they contain. This will
better help you understand the results produced by the Union tool.
2. Close the tables.
3. Click on the ANALYSIS tab in the ribbon.