Characteristics of a route, such as speed limit and functional class, can be represented as a linear event offset from a point feature class. The Line Events tool provides an interface to add linear events into the geodatabase. The reference offset data is translated to routes and measures for storage.
The reference point feature layer must be in the same map service as route/network layer.
- Open Event Editor and, if prompted, sign in to Portal for ArcGIS or ArcGIS Online.
- Click the Edit tab.
- In the Edit Events group, click the Line Events button .
The Add Linear Events widget appears.
The selections for the network to and from method and measure can be configured in advance when configuring, creating, or editing the default settings for attribute sets. For more information about configuring, creating, and editing default settings for attribute sets, see Producing attribute sets and Configuring attribute sets.
- Click the Network (LRM) drop-down arrow and choose the network that will serve as a source LRM for defining the input measures for the new events.
- Type a route ID in the Route ID text box on which the new event measure will be based.
You can also click the Select a Route on the Map button to choose the route on the map.
If a message appears that is related to acquiring locks, the need to reconcile, or not being able to acquire locks, Roads and Highways conflict prevention is enabled. For more information about these messages, see Conflict prevention in the Event Editor.
- In the From section, click the Method drop-down arrow to choose a point feature layer to enter the from measure value using a reference offset layer.
The point layers are suffixed with the word offset in the drop-down list.
- For the location, click the Select a Location on the Map button and choose a point feature on the map that participates in the layer selected for offsetting.
- Provide the Offset value for the reference offset using one of these options:
- Select the direction of the offset using the Direction drop-down arrow, type the offset value, and choose the units.
- Type the value and choose the units.
- Click the Select an Offset Location on the Map button to choose a location on the map along the route.
The direction is an optional selection. If no direction is selected, a positive offset value will place the from measure location along the direction of calibration from the selected point feature. If a direction is selected, an offset value will place the from measure location towards the direction selected from the selected point feature.
The green plus symbol now moves to the new offset location along the route on the map. This is the location of the from measure value for the events.
- In the To section, click the Method drop-down arrow and choose Length.
- Provide the length for the events using one of these methods:
- Type the value.
- Click the Select a Location on the Map button and choose a location on the map along the route.
A red cross symbol appears at the selected location on the map.
- Choose the date that will define the start date of the events by doing one of the following:
- Click the Start Date drop-down arrow to choose the start date using a calendar.
- Check the Use route start date check box to use the start date of the routes.
The start date defaults to today's date, but you can choose a different date using the date picker. The end date is optional, and if it's not provided, the event remains valid now and into the future.
- Choose the date that will define the end date of the events by doing one of the following:
- Click the End Date drop-down arrow to choose the end date using a calendar.
- Check the Use route end date check box to use the end date of the routes.
- You can choose four different data validation options to prevent erroneous input while characterizing a route with linear events.
- Retire overlaps—The system will adjust the measure and start and end dates of existing events in such a way that the new event does not cause an overlap with respect to time and measure values.
- Merge coincident events—When all attribute values for a new event are exactly the same as an existing event, and if the new event is adjacent to or overlapping the existing event in terms of measure values, the new event is merged into the existing event and the measure range is expanded accordingly.
- Prevent measures not on route—This data validation option ensures that the input measure values for from measure and to measure values fall within the minimum and maximum range of measure values on the selected route.
- Save events to dominant routes—Adds events to the dominant route in a section with concurrent routes. If enabled, any concurrent sections on the route selected will allow you to choose which route the events will be added to on each concurrent section. This option is available when the network selected has dominance rules configured.
- Click Next.
The tab showing the attribute set for the events opens. The event fields are shown under the attribute group named G1.
You can use the check boxes to add data for specific events within the attribute set. No records are added for the unchecked events. As shown in the example below, no records are added to the County_A and City_A events.
- Enter the attribute information for the new event in the tables defined by attribute sets.
You can click the Copy Attributes button and click a route on the map to copy event attributes from another route.
Coded value, range domains, and subtypes are supported when configured for any field in the Attribute-Value table.
- Use these options to access more information on the attribute set.
- Check the Show network name check box to see which LRS Network the selected event layer is associated with.
- Checking the Go to the next measure upon save check box results in prepopulating the from measure value using the to measure value of the present section to continue the event creation process. For example, this will occur if events are created on the route using a from measure value of 0 miles and a to measure value of 0.289 miles. If you click Save, using this option checked on the Attribute Set tab, the Add Linear Events widget is prepopulated with the value of 0.289 miles as the from measure value for the new events.
- Click Save.
If you configured your instance of Event Editor to not allow dates prior to the start date of the route, and you enter a date prior to the start date of the selected route in Start Date, a warning message will appear alerting you to choose a date on or after the start date of the selected route.
A confirmation message appears in the bottom right once the newly added line events are saved.
The new linear events are created and displayed on the map. The reference offset data is translated to routes and measures for storage.
After an event has been successfully created, you have the following two options to continue characterizing the route:
- When you click New Edit, all the input entries in the widget are cleared, and the default values from the geodatabase are populated in the attribute table.
- When you click Next Edit, all the existing entries in the widget and the attribute table are retained for the convenience of quick editing of similar characteristics.