In this example you will see how to repair a small gap in linework, then create a new lot polygon feature and fix some topology errors.

The key combination Alt+R opens the Editor menu, and N opens the Snapping Environment dialog box. Pressing the Z key while you are editing allows you to quickly switch to the Zoom In tool. Using keyboard shortcuts can make editing quicker.

In this example you double-click a feature to switch to the Modify Feature edit task. This allows you to click and drag individual vertices of the feature to reshape it. Since snapping has been enabled for the endpoint of the line features, it is possible to accurately snap the end of the feature that you're editing to the nearby line's end point.

The Construct Features tool lets you build new features from selected features' geometry during an edit session. The new feature will be constructed in the Target feature class. Since the two selected lines are connected to adjacent polygon features, you use the option to create polygons considering existing features. This creates a new polygon in the space enclosed by the lines and adjacent polygons.

After the new Lot polygon is created you can validate the topology. The new polygon covers the LotID point, the polygon boundary covers the lot lines, and you fixed the dangle errors by snapping them together, so when you validate the topology in the area, all of those errors go away.

It is important to note that the new polygon has a null value for its Parcel_ID attribute. The other parcels, which you created in ArcCatalog, derived their Parcel_ID attribute values from the LotID point feature class. There are several ways that you could add this information to the new parcel. You could edit the parcel’s attributes and type in its Lot_ID value. You could select the LotID point feature and the Lot polygon, open the Attributes dialog box, and copy and paste the Parcel_ID value from one to the other. You could even use the Attribute Transfer tool on the Spatial Adjustment toolbar to transfer the attributes from the point to the polygon.

This example skips the step of updating the new polygon feature’s attributes. In the next segment you'll see how to edit another of the polygons.