Enterprise Linear ReferencingClive Reece, Esri Professional Services

Transportation Practice

When someone says “Network”, what do they mean?

Different uses and goals for each

Routing Network Linear Referencing Network Schematic Network

When someone says “Network”, what do they mean?

• Routing from A to B• Multi-Vehicle Routing• Find Closest Facilities• Perform Location Allocation• Generate Service Areas• Create Origin-Destination

Matrices

Routing Network Linear Referencing Network Schematic Network

When someone says “Network”, what do they mean?

Routing Network Linear Referencing Network Schematic Network

• Generate schematic views• Visualize both Map and Schematic

• Focus on connections between branches

• Analyze network connectivity and traces

When someone says “Network”, what do they mean?

Routing Network Linear Referencing Network Schematic Network

• Methodology for locating assets and business data based on a position along a route (Route and Measure) rather than X-Y coordinates

When someone says “Network”, what do they mean?

Routing Network Linear Referencing Network Schematic Network

Different uses and goals for each

Linear Referencing Basics

Route Networks contain polylines used for measurement called “routes”

Events are point locations or linear extents that are referenced against a route

The collection of data and tools for maintaining Routes and Events is called a Linear Referencing System (LRS)

0 10 mi

Route 1001

Linear Referencing Basics

0 10 mi

2 8

Route 1001

4

Linear Referencing “Routes” in different Industries

Industry “Route”

Department of TransportationLocal Government

HighwayRoad or Street

Utilities Pipeline

Rail Line Segment or Track

Examples of Events in Rail

• Assets

- Switches

- Signs

• Characteristics

- Number of tracks

- Grade

• Classifications

- Subdivision

- Ownership

- STRACNET

LRS Networks contain polylines used for measurement called “routes”

LRS Events are point locations or linear extents that are referenced against a route

0 10 mi

Route 1001

Linear Referencing Basics – Events are Tabular data

Many tabular LRS systems

0 10 mi

2 8

Route 1001

4

Event ID Route From Measure

To Measure

Business Data

1 1001 2 8 55 mph

Event ID Route Measure Business Data

1 1001 4 Crash

Typical LRS Business Challenges

Business data out

of sync (Multiple

copies of data)

Combining data is a

headache so people

keep ‘private’ copies

of other teams’ data

Track and alignment

changes create a

nightmare for

updating measure

changes on events

Different business

units use different

location referencing

methods

Typical LRS Business Problems

Business data out

of sync (Multiple

copies of data)

Combining data is a

headache so people

keep ‘private’ copies

of other teams’ data

Track and alignment

changes create a

nightmare for

updating measure

changes on events

Different business

units use different

location referencing

methods

Typical LRS Business Problems

Business data out

of sync (Multiple

copies of data)

Combining data is a

headache so people

keep ‘private’ copies

of other teams’ data

Track and alignment

changes create a

nightmare for

updating measure

changes on events

Different business

units use different

location referencing

methods

Wouldn’t it be nice to have an Enterprise solution …

Authoritative

and open data

access across

the organization

Keep rail event

attributes

aligned with rail

line changes

Each business

unit can

manage their

own data

Provide tools to

combine and

report on data

Create an authoritative system of record for location

Esri Linear Referencing

Esri Core Linear Referencing

• Linear Referencing Toolbox

• Provides tools for

- Creating Routes

- Calibrating Routes

- Create Event features from tabular data (Dynamic Segmentation)

- Combine (segment) two event tables

• Not an Enterprise Solution

- Event data is not dynamically linked to changes in routes

- Does not scale well to large numbers of editors

- Focused on desktop, single-user experience

Esri Roads and HighwaysIntegrate Data across

business units and business

systems

Edit across the webSimplify LRS Updates

Analyze and Report Data When

You Need It

Advanced Linear Referencing

❖Support for Multiple LRMs

❖Support for translating event data to different LRMs

❖Rule Based Location Management : Stay Put, Move, Retire & Snap

❖Communicating updates to LRS using Redlines

❖Time Aware LRS

❖Web-based Event Data editing using Roadway Characteristics Editing

Route Editing Activities

Create Route

Extend Route

Realign Route

Reassign Route

Retire Route

Calibration

0 100

0 100

120

0 100

retired

0 100

0 10052

20 80

30 70

20 80

I-110 I-10I-10

0 100

retired

Activities

Route & Measure

0 10

2 8

Referent & Offset

2 miles - 4 miles

Stationing Co-ordinates and Offset

0 1000

300 ft.

(34.054, 117.182)

Event Location Model

Event Measure BehaviorsAutomatically keep event measure behaviors in sync with route edits

Stay Putbehavior

Movebehavior

Retirebehavior

Before Realignment

5 255

25

5

8.35

25

When the LRS routes are edited, measure behavior rules can be applied to events.

Time Aware LRSSee how routes and events have changed over time

Before After

Realignment

Communicate using Redlines

❖Mark-up feature to illustrate desired network changes

❖Has measure values and route reference

❖Geometry need not be accurate

❖Provides a template for making edits

❖Indicates where work needs to be done

❖Optional

Editing Roadway Characteristics

❖Web-based event editing

❖Edit multiple event layers simultaneously

❖On entry quality control

❖Valid value drop down lists

❖Automatically retire overlaps

❖Merge coincident events

❖Prevent measures not on route

❖Batch quality control

❖ Identify gaps

❖ Identify overlaps

❖ Identify measures not on routes

Roadway Reporter

Reporting available across the enterprise from a web application

Road Mileage Report

Road Segment Report

Road Log Report

Demo: Rail LRS with Schematic view

Demo Re-cap

Dynamic updates of Events

on a single, authoritative LRS

Network exposed through a

GIS Enterprise

Roads and Highways REST API in action

• Geometry to Measure

• Edit/Add Events

Roads and Highways Event

Editor (COTS)

• Add/manage point and

linear events

• Flexible options for linear

referencing method input

Didn’t get to Route Reporting

… happy to arrange a demo

separately

Wrap Up: Roads and Highways is part of the ArcGIS Platform

• Leverage all the great patterns of the platform

Integrate with Portal and Enterprise Identity Management

Integrate Collector with your LRS

Import and visualize Reporter data in Ops Dashboard