Extending a route using multiple source geometry features

Sometimes you have more than one source geometry feature to extend an existing route. This is often the case when source geometry comes from computer-aided design and drafting (CADD) files or other sources outside of the GIS team. Using multiple source geometries can cause problems for route calibration, especially when some of the features are not contiguous.

The Roads And Highways Editing tools seamlessly detect when you use more than one source geometry feature.

Esri Roads and Highways supports the following geometry selections:

• Multiple segments from one source geometry feature
• Multiple segments from multiple source geometry features

Steps:

1. Start ArcMap.
2. Add the necessary layers to begin an edit session.
3. Zoom to the location of your new route.
4. Optionally select a redline feature.
5. Select source geometry features.

   Press the SHIFT key to draw a bounding box to select or deselect source geometry features. The features are labeled on the map based on the order of selection. You can opt to select multiple source geometry types, including CADD, shapefile, or feature class.

   Note:

   If you draw a bounding box around multiple features, the labels may not be in sequential order.

   The selected source geometry features are highlighted on the map. A label is placed in the center of the feature to let you know the sequence of the extension.

6. Click the Apply button on the Roads And Highways Editing toolbar.
7. Define the From Measure. There are many ways to define the From Measure as outlined below:

   Redline	If a redline is selected, the From Measure that is displayed is pulled from the From measure column in the redline attributes. Note: If you select both a redline and one or more source geometry features, the redline attributes take precedent and is input as the From Measure. If the redline feature does not have a From measure column or the field is NULL, the From measure is auto-populated as 0. You can change the method by which the From Measure is calculated using suggested measures. Alternatively, you can reset your selection and select only the source geometry to pull the From Measure from the source geometry length.
   Source geometry	If no redline is selected and one or more source geometry features are selected, the From measure that is displayed is pulled from the source geometry attributes. Note: If a redline and a source geometry is selected, the From Measure is pulled from the redline attributes. You can change the method by which the From Measure is calculated using spatial selection or suggested measures.
   Suggested measures	If you do not know the From Measure, you can let Roads and Highways suggest the From Measure. The Calculate tool returns the From Measure by calculating the source geometry length minus (-) the To Measure. Optionally enter a To Measure. Next to the From Measure, click Calculate .

   When you hover the pointer over the From Measure field, text appears at the bottom of the dialog box to let you know how the From Measure was calculated.

8. Define the To Measure. There are many ways to define the To Measure as outlined below:

   Redline	If a redline is selected, the To Measure that is displayed is pulled from the To measure column in the redline attributes. Note: If you select both a redline and one or more source geometry features, the redline attributes take precedent and is input as the From Measure. If the redline feature does not have a From measure column or the field is NULL, the From measure is auto-populated as 0. You can change the method by which the To Measure is calculated using suggested measures. Alternatively, you can reset your selection and select only the source geometry to pull the To Measure from the source geometry length.
   Source geometry	If no redline is selected and one or more source geometry features are selected, the To measure that is displayed is pulled from the source geometry attributes. Note: If a redline and a source geometry is selected, the To Measure is pulled from the redline attributes. You can change the method by which the To Measure is calculated using spatial selection or suggested measures.
   Suggested measures	If you do not know the To Measure, you can let Roads and Highways suggest the To Measure. The Calculate tool returns the To Measure by calculating the source geometry length plus (+) the From Measure. Optionally enter a From Measure. Next to the To Measure, click Calculate .

   When you hover the pointer over the To Measure field, text appears at the bottom of the dialog box to let you know how the To Measure was calculated.

9. Verify the attributes in the form and click OK.

   The extension is applied to the existing route.