Create a Subset Geography

After at least one geography has been imported, a new subset geography can be created from the parent geography.  

Follow these steps:

1. In the map view, use the select tool to click and drag a rectangular border around the geography that will be a subset of the parent geography. Alternatively, you can hold down the control key and add items to the selection individually.

2. Right-click on the subset you have created. From the list of options, choose "New geography from selected."

3. Select the parent geography and give a new name to the subset geography you want to create.

4. Determine if you want to include the parent geography's datasets, then check the appropriate box. Click Ok. The subset geography will appear in the dataset pane of the map window, listed under the parent geography you chose. You can view the subset as a new map and proceed with your analysis.

If you want to include only a subset of the datasets, deselect the check box to include the datasets from the parent geography.  After the subset geography is created, drag the datasets you want from the parent geography and drop them on the name of the subset geography.  They will appear below the geography name.  It is also possible to drag datasets from a "child" geography up to the parent geography level.