Events data model

Available with Location Referencing license.

Events are managed in ArcGIS Roads and Highways in feature classes called event feature classes, which are registered in the same geodatabase as the linear referencing system (LRS). Roads and Highways manages the shape of the feature based on the route, measure, and To and From dates. The required source event data differs depending on the event type being registered. The required fields for each event type are listed in the following sections.

Note:

Event feature classes can be modeled in advance or created when registering the event in the LRS. If modeled in advance, ensure that the spatial reference and x,y-, z-, and m-tolerance and resolution of the event feature class match that of the network in which it's registered.

Learn more about tolerance and resolution settings for the LRS

Minimum event fields

The minimum event fields are as follows:

FieldData TypeLengthIsNullableDescription

Event ID

String

Between 32 and 255

No

The unique ID for each event record.

Route ID

String

Same length as the Route ID field in the centerline sequence table

No

The unique ID for each route in the network.

From Date

Date

8

Yes

The date that the event becomes active on the route.

To Date

Date

8

Yes

The date that the event is retired on the route.

Measure (point events only)

Any Numeric

No

The measure on the route where the event is located.

From Measure (line events only)

Any Numeric

No

The measure on the route where the beginning of the event is located.

To Measure (line events only)

Any Numeric

No

The measure on the route where the end of the event is located.

Location Error

String

100

Yes

The location error for the event.

Event referent fields

When registering events, you can store the event location based on its offset from another location. The offsets can be based on x- and y-coordinates, a station, the length from the beginning of an event, other LRS events, intersections, or another point feature class.

To enable storing referent locations with an event, the following fields are required:

FieldData TypeLengthIsNullableDescription

Referent Method (point events only)

Short Integer

5

Yes

The method for referencing the offset feature. This can be x,y coordinates, stationing, length, LRS Network, event, intersection, or other point feature classes.

Referent Location (point events only)

String

Between 50 and 255

Yes

The location of the offsetting feature. This can be an x,y coordinate, feature or event ID, or intersection ID.

Referent Offset (point events only)

String

Between 50 and 255

Yes

The offset measure. Saved in the unit of measure configured when registering an event and configuring the offset fields.

From Referent Method (line events only)

Short Integer

5

Yes

The method for referencing the offset feature. This can be x,y coordinates, stationing, length, LRS Network, event, intersection, or other point feature classes.

From Referent Location (line events only)

String

Between 50 and 255

Yes

The location of the offsetting feature. This can be an x,y coordinate, feature or event ID, or intersection ID.

From Referent Offset (line events only)

String

Between 50 and 255

Yes

The offset measure. Saved in the unit of measure configured when configuring offset fields.

To Referent Method (line events only)

Short Integer

5

Yes

The method for referencing the offset feature. This can be x,y coordinates, stationing, length, LRS Network, event, intersection, or other point feature classes.

To Referent Location (line events only)

String

Between 50 and 255

Yes

The location of the offsetting feature. This can be an x,y coordinate, feature or event ID, or intersection ID.

To Referent Offset (line events only)

String

Between 50 and 255

Yes

The offset measure. Saved in the unit of measure configured when configuring offset fields.

Stationing event fields

When registering an event that uses stationing, all of the fields from a Route and Measure point event are required in the source event data. The following fields are required for an event that uses stationing:

FieldData TypeLengthIsNullableDescription

Station

String

Any

Yes

The stationing value for the station.

Back Station

String

Any

Yes

The back stationing value for the station. This value is populated when an equation point is present at the station location.

Station Direction

String

Any

Yes

The field used to designate if stationing values increase in the opposite direction of the increase in measure on routes.