Georeferencing Routing Junctions

When defining a routing reach, the user might use multiple cross sections or reach geometries. In this situation, several routing reaches are connected with routing junctions to represent the extent of the routing reach to which the defined reach geometry should be applied. If a routing junction is not located at the correct location on the routing reach, the user can use the Georeference Routing Junctions command to automatically map/georeference that routing junction to a required location.

Note that a CRS should be assigned prior to running this command. Otherwise, the software will display the informational dialog box that appears below.

Refer to this article in our knowledge base to learn how to assign a coordinate reference system to a project.

Follow the steps below to georeference an existing routing junction:

1. From the Input ribbon menu, click on the Routing Junctions dropdown menu and select the Georeference Routing Junctions command.
   
2. The Georeference Routing Junctions dialog box will be displayed.
   

The following sections describe how to georeference an existing routing junction and interact with the above dialog box.

Selecting Routing Junction to Georeference

The Select Routing Junction to Georeference section allows the user to interactively select the routing junction to georeference.

Follow the steps below to select the routing junction to be georeferenced:

1. Select the routing junction from the Routing junction ID dropdown combo box that lists all the routing junctions contained within the current scenario.
   
2. Alternatively, the user can click the [Pick] button to select the routing junction from the Map View. After clicking the [Pick] button, the Georeference Routing Junctions dialog box will temporarily disappear, and a prompt will be displayed on the status bar instructing the user to select the routing junction from the Map View.
3. Upon selecting the routing junction, the user will be immediately returned to the Georeference Routing Junctions dialog box, and the selected routing junction will be highlighted on the Map View.
4. Click the [Clear] button to cancel the previous selection and redo the entire process.

Once the routing junction has been selected, the user can choose among the following georeferencing options:

• Snap to Alignment Point
• Slide Along Alignment Polyline
• Draw on Map View

Snapping Routing Junction to an Alignment Point

If an existing alignment point for the routing junction exists on the Map View, the Snap to Alignment Point georeferencing option can be used to snap the routing junction to the alignment point.

Follow the steps below to use the Snap to Alignment Point option:

1. Select the Snap to Alignment Point radio button option.
2. Click the [Pick] button next to the Select alignment point read-only field.
   
3. The Georeference Routing Junctions dialog box will temporarily disappear, and a prompt will be displayed on the status bar instructing the user to select the alignment point.
4. Select the alignment point on the Map View. Note that the user can select only one alignment point at a time for georeferencing.
5. The Georeference Routing Junctions dialog box will be redisplayed and the status of the Select alignment point read-only field will be changed from Not Selected to Selected. Click the [Clear] button to cancel the previous selection and redo the entire process.
6. After selecting the alignment point, click the [Snap] button to snap the selected routing junction to the alignment point.
   

Sliding Routing Junction Along Alignment Polyline

If a routing junction has been snapped to an alignment point on the Map View but is not precisely located where it should be, the Slide Along Alignment Polyline option can be used to manually slide the routing junction along the routing reach alignment polyline.

Follow the steps below to use the Slide along Alignment Polyline option:

1. Select the Slide Along Alignment Polyline radio button option.
2. Click the [Pick] button to select the routing reach alignment polyline from the Map View.
   
3. The Georeference Routing Junctions dialog box will temporarily disappear, and a prompt will be displayed on the status bar instructing the user to select the routing reach alignment polyline from the Map View.
4. After selecting the routing reach alignment polyline, the following informational dialog box will be displayed. Click the [Yes] button to select the polyline or abort the selection by clicking the [No] button.
   
5. Once the routing reach alignment polyline is selected, the Georeference Routing Junctions dialog box will be redisplayed and the status of the Select alignment polyline element read-only field will be changed from Not Selected to Selected. Then, click the [Slide] button.
   
6. The Georeference Routing Junctions dialog box will temporarily disappear, and a prompt will be displayed on the status bar instructing the user to select the routing junction and drag it along the underlying routing reach alignment polyline.
7. Click and drag the routing junction on the Map View to revise its alignment.
8. When finished, press the [Enter] key or right-click and select Done from the displayed context menu. The Georeference Routing Junctions dialog box will be redisplayed, and the routing junction will be georeferenced at the new location.

Note: For more precision, the user can use the Snap to Alignment Point option first and then use the Slide Along Alignment Polyline option.

Drawing Routing Junction on Map View

The Draw on Map View option allows the user to draw an alignment point and automatically snap the selected routing junction to the drawn point.

Follow the steps below to use the Draw on Map View option:

1. Select the Draw on Map View radio button option and click the [Draw] button.
   
2. The Georeference Routing Junctions dialog box will temporarily disappear, and a prompt will be displayed on the status bar instructing the user to draw the alignment point on the Map View.
3. Draw the alignment point on the Map View. When finished, press the [Enter] key or right-click and select Done from the displayed context menu.
4. The Georeference Routing Junctions dialog box will be redisplayed, and the routing junction will automatically snap to the drawn alignment point.

Assigning Routing Junction Elevation

The user can check the Assign Elevation checkbox option to assign an elevation to the routing junction using a terrain model. Define this section before georeferencing a routing junction so that the elevation can be assigned.

Terrain Elevation Source

Depending upon the selected terrain elevation source, the contents of the Assign Elevation section changes to specify additional elevation data information.

The Terrain elevation source dropdown combo box supports the following surface types:

• Elevation Grid
• LandXML Data
• TIN Surface

Elevation Grid

If the user selects Elevation Grid as the terrain elevation source, the contents of the Assign Elevation section changes, as shown below.

The following option is displayed when Elevation Grid is selected as the terrain elevation source:

• Elevation grid layer
  This dropdown combo box allows the user to select the elevation grid layer available in the project.

LandXML Data

If the user selects LandXML Data as the terrain elevation source, the contents of the Assign Elevation section changes, as shown below.

The following options are displayed when LandXML Data is selected as the terrain elevation source:

• TIN surface layer
  This dropdown combo box allows the user to select the TIN surface layer type.

• TIN surface
  This dropdown combo box allows the user to select the TIN surface type.

TIN Surface

If the user selects TIN Surface as the terrain elevation source, the contents of the Assign Elevation section changes, as shown below.

The following options are displayed when TIN Surface is selected as the terrain elevation source:

• TIN surface layer
  This dropdown combo box allows the user to select the TIN surface layer type.

• TIN surface
  This dropdown combo box allows the user to select the TIN surface type.