Now that all of the polylines are drawn, we can use the Draw | Edit Boundaries | Create Polygons by IDs command to combine all polylines with the same name into a new polygon. Each polyline must have a Primary (Left) and Secondary (Right) ID properly assigned before using this command.
To combine the polylines:
To assign the left side to the Primary and the right side to the Secondary ID, click the Map | Data | Edit Attributes Fields command.
In the Data Attributes dialog,
Click on Tertiary next to Polygon Left and select Primary from the list.
Click on Quaternary next to Polygon Right and select Secondary from the list.
Click OK.
Click the Draw | Edit Boundaries | Create Polygons by IDs command.
In the Create Polygons by ID's dialog,
Click on Colorado in the Select Left/Right ID box.
Click Create. The polygon is created on the map with the default polygon properties and the Primary name of Colorado.
Click on Kansas in the Select Left/Right ID box.
Click Create. The polygon is created on the map with the default polygon properties and the Primary name of Kansas.
Click on Nebraska in the Select Left/Right ID box.
Click Create. The polygon is created on the map with the default polygon properties and the Primary name of Nebraska.
Click on Wyoming in the Select Left/Right ID box.
Click Create. The polygon is created on the map with the default polygon properties and the Primary name of Wyoming.
Click Close to close the dialog.
If a polygon is not created, check the left and right IDs. Usually, troubles with polygon creation mean the IDs were entered incorrectly. Another common cause of a polygon not being created is the digitized beginning and ending points not being within the snap tolerance circle of the other points. in the area.
Congratulations! You have now completed the advanced tutorial for Didger.
Back to Digitizing the Shared Polylines
Back to Tutorial Introduction