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Events data model

  • Route and Measure events
  • Storing Referent Location with events
  • Stationing events

Events are registered, or created, in Esri Roads and Highways in feature classes called event feature classes. For internal events, Esri Roads and Highways manages the shape of the feature based on the route, measure, and to and from dates. This provides increased performance in ArcGIS for Desktop for mapping and spatial query of the event data. For external events, a read-only connection with the source event data is established, and a feature class for that event is created, but changes are not written to the source event data. When registering an event, you can register either a feature class or event table. Depending on the type of event being registered, different fields are required in the source event data. The required fields for each event type are below.

Route and Measure events

Registering an event based on Route and Measure requires the records in the source data to have a route in the network and measure value to locate properly. In addition to those fields, the following fields are required in the source event data.

FieldData TypeLengthIsNullableDescription

EventID

String

Between 32 and 255

Yes

Unique ID for each event record

RouteID

String

Length of the Network RouteID field or greater

Yes

Unique ID for each route in the network

FromDate

Date

8

Yes

The date the event became active on the route

ToDate

Date

8

Yes

The date the event was retired on the route

Measure (point events)

Any Numeric

Yes

The measure on the route where the event will be located

FromMeasure (line events)

Any Numeric

Yes

The measure on the route where the beginning of the event will be located

ToMeasure (line events)

Any Numeric

Yes

The measure on the route where the end of the event will be located

Route and Measure events fields

Storing Referent Location with events

When registering Route and Measure events, the option to store the event location based on its offset from another location is possible. These offsets can be based on x- and y-coordinates, a station, length from the beginning of an event, other LRS events, intersections, or another point feature class. To enable storing referent locations with a Route and Measure event, the following fields should be in the source event data.

FieldData TypeLengthIsNullableDescription

ReferentMethod (point events)

Short Integer

5

Yes

Method of referencing the offset feature. Can be X,Y coordinates, Stationing, Length, LRS Network, Event, Intersection, or other point feature class.

ReferentLocation (point events)

String

Between 50 and 255

Yes

Location of the offsetting feature. Can be an X,Y coordinate, Feature/EventID, or IntersectionID.

ReferentOffset (point events)

String

Between 50 and 255

Yes

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

FromReferentMethod (linear events)

Short Integer

5

Yes

Method of referencing the offset feature. Can be X,Y coordinates, Stationing, Length, LRS Network, Event, Intersection, or other point feature class.

FromReferentLocation (linear events)

String

Between 50 and 255

Yes

Location of the offsetting feature. Can be an X,Y coordinate, Feature/EventID, or IntersectionID.

FromReferentOffset (linear events)

String

Between 50 and 255

Yes

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

ToReferentMethod (linear events)

Short Integer

5

Yes

Method of referencing the offset feature. Can be X,Y coordinates, Stationing, Length, LRS Network, Event, Intersection, or other point feature class.

ToReferentLocation (linear events)

String

Between 50 and 255

Yes

Location of the offsetting feature. Can be an X,Y coordinate, Feature/EventID, or IntersectionID.

ToReferentOffset (linear events)

String

Between 50 and 255

Yes

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

Referent location fields for linear event

Stationing events

When registering a stationing event, all of the fields from a Route and Measure event are required in the source event data. In addition, the following fields should be present in the source event data.

FieldData TypeLengthIsNullableDescription

AheadStation

String

Between 10 and 255

Yes

Stationing value for the station.

BackStation

String

Between 10 and 255

Yes

Back stationing value for the station. This value would be populated if an equation point is present at the station location.

Direction

Any Numeric or String

Yes

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

Stationing event fields

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