Add linear events

Characteristics of a route, such as speed limit, functional class, and so on, can be represented as a linear event with starting and ending measure information along a route. This tool provides an interface to add linear events into the geodatabase.

• You can specify the LRS Network to be used as the LRM for defining the start and end measures of the new linear event. Roadway Characteristics Editor (RCE) also accepts measures in another network or LRM than the linear event layer is not associated with.
• The new event will be associated to the route (route ID) from the LRS Network with which the event location is intersecting.
• If the event ID field in the event layer is of string data type (minimum 32-character length), then RCE will assign a GUID to the new linear event.

Steps:

1. Open a web browser and navigate to Roadway Characteristics Editor.
2. Click Edit > Add Linear Events.
   The Add Linear Events dialog box appears.

3. Select the Network (LRM) that will serve as a source LRM for defining the input measures for the new linear events.

   The Network (LRM) can be a LRS Network published as a layer in RCE.

4. Type the Route ID on which the new event measure will be provided in the Route ID text box or use the Select a Route on the Map tool to pick the route from the map.

   Notice the selected route is now highlighted in the map.

   Note:

   If the selected route is not in active view of the map, you can click the Zoom to route on the map button to refresh the map display to zoom in to the entire extent of the selected route.

5. Type the intended start location for the new linear event along the route in the From Measure text box or use the Select From Measure on the Map tool to pickthe start location from the map. Notice a green plus symbol is dropped at the selected location in the map.
6. Type the intended end location for the new linear event along the route in the To Measure text box or use the Select To Measure on the Map tool to pick the end location from the map. Notice a red cross symbol is dropped at the selected location in the map.
7. Using the calendar control, choose the Start Date and End Date that will define the date range of the event. The start date defaults to today's date, but you can select a different date using the date picker. The end date is optional, and if the end date is not provided, the event remains valid now and into the future.
8. You can choose three 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 and To measure fall within the minimum and maximum range of measure values on the selected route.
9. Enter all the attribute information for the new event in the tables defined by Attribute Sets. You can create custom Attribute Sets or use the administrator-configured attribute set.
10. Use the Show network name check box to see what LRS Network the select event layer is associated with. The list of attributes within the tables defined by Attribute Sets can be from more than one event layer. If you would like to identify the source event layer for each attribute, check the Show layer names check box.
11. Click Save. The new linear event is now created and displayed in the map.
12. After a linear event has been successfully created, you have two options in order to continue characterizing the route. When you clickthe New button, all the input entries in the form are cleared and the default values from the geodatabase are populated in the table, whereas when you click the Next button, all the existing entries in the form and the attribute table are retained for convenience and for quick editing of similar characteristics.

Providing measures in a different LRM than the events are stored in.

You can specify the LRS Network that will used as a source LRM for input start and end locations for the new linear event. If the selected LRS network is not the same as the one that the linear event layer is registered with, then Roadway Characteristics Editor (RCE) performs an internal translation of measures to always store the measure value in the LRM of the LRS Network with which the event is registered.

• In cases where the input location for the new event does not have partial overlap with the route in the target LRS Network, the measure values of the linear event created is adjusted to match the shape of the route.
• In cases where the input location for the new event may intersect with more than one route in the registered LRS Network, the linear event is split into multiple events such that the shape of the events matches the shape of the route feature intersecting it, and the measure values are adjusted.
• In cases where the input location for the new event may intersect more than one route (overlapping) in the registered LRS Network, a linear event is created for all the routes in the overlapping section of the input.