How to meet these Challenges

September 2006

Marc Kratzschmar

Implementing the Canadian National Road Network linear referencing data model at New Brunswick DOT

Acknowledgements

• New Brunswick DOT Project Team– Kim Mathisen– Dawn Vincent Dixon– Pablo Romero– Dean Fletcher

• Exor Project Team– Zubran Solaiman– Sarah Kistulinec– Jon Libby

Three Stories

National Road Network

New Brunswick DOT Project

Network Data Lessons

Not much time, but they’re all related

Canadian National Road Network (NRN)

National Street Data ModelNational Street Database

National PartnershipLed by NRCan

Objective: One homogeneous (core) geometry for the entire

Canadian Landmass and maintained by closest to the

source providers.

Canadian National Road Network (NRN)

��NETWORK LINEAR ELEMENT

NID : UUID ["aa"] FromJunction : UUID ToJunction : UUID OGC_LineString : 2D_Geometry DataSetName : Integer [1-13] ObjectMetadata : OBJECTMD

�

ROAD ELEMENT

ExitNumber 0,1 : String (10) DirectOfTrafficFlow: Int [1-3]

FERRY CONNECTION

��JUNCTION

NID : UUID ["aa"] OGC_Point : 2D_Geometry JunctionType : Integer [1-4] ExitNumber 0,1 : String (10) DataSetName : Integer [1-13] StandardsVersion:Str(100)

�

Is the start of 1,NStart at 1,1

Is the end of 1,NEnds with 1,1

DirectOfTrafficFlow: Int [-1, 1-3]

["aa" / "-"]

["aa" / "-"]

["aa"]["aa"]

["aa"]

Canadian National Road Atlas (NRN)

��NETWORK LINEAR ELEMENT

NID : UUID ["aa"] FromJunction : UUID ToJunction : UUID OGC_LineString : 2D_Geometry DataSetName : Integer [1-13] ObjectMetadata : OBJECTMD

�

ROAD ELEMENT

ExitNumber 0,1 : String (10) DirectOfTrafficFlow: Int [1-3]

FERRY CONNECTION

��JUNCTION

NID : UUID ["aa"] OGC_Point : 2D_Geometry JunctionType : Integer [1-4] ExitNumber 0,1 : String (10) DataSetName : Integer [1-13] StandardsVersion:Str(100)

�

Is the start of 1,NStart at 1,1

Is the end of 1,NEnds with 1,1

DirectOfTrafficFlow: Int [-1, 1-3]

["aa" / "-"]

["aa" / "-"]

["aa"]["aa"]

["aa"]

Canadian National Road Network (NRN)

��NETWORK LINEAR ELEMENT

NID : UUID ["aa"] FromJunction : UUID ToJunction : UUID OGC_LineString : 2D_Geometry DataSetName : Integer [1-13] ObjectMetadata : OBJECTMD

�

ROAD ELEMENT

ExitNumber 0,1 : String (10) DirectOfTrafficFlow: Int [1-3]

FERRY CONNECTION

��JUNCTION

NID : UUID ["aa"] OGC_Point : 2D_Geometry JunctionType : Integer [1-4] ExitNumber 0,1 : String (10) DataSetName : Integer [1-13] StandardsVersion:Str(100)

�

Is the start of 1,NStart at 1,1

Is the end of 1,NEnds with 1,1

DirectOfTrafficFlow: Int [-1, 1-3]

["aa" / "-"]

["aa" / "-"]

["aa"]["aa"]

["aa"]

Canadian National Road Network (NRN)

��NETWORK LINEAR ELEMENT

NID : UUID ["aa"] FromJunction : UUID ToJunction : UUID OGC_LineString : 2D_Geometry DataSetName : Integer [1-13] ObjectMetadata : OBJECTMD

�

ROAD ELEMENT

ExitNumber 0,1 : String (10) DirectOfTrafficFlow: Int [1-3]

FERRY CONNECTION

��JUNCTION

NID : UUID ["aa"] OGC_Point : 2D_Geometry JunctionType : Integer [1-4] ExitNumber 0,1 : String (10) DataSetName : Integer [1-13] StandardsVersion:Str(100)

�

Is the start of 1,NStart at 1,1

Is the end of 1,NEnds with 1,1

DirectOfTrafficFlow: Int [-1, 1-3]

["aa" / "-"]

["aa" / "-"]

["aa"]["aa"]

["aa"]

Canadian National Road Network

UnpavedDeerSpeed limit

100 metersStart at 30 meters

End at 70 meters

LRS ViewThanks to Marcel Sabourin

Canadian National Road Network (NRN)

UnpavedDeerSpeed limit

7 Segments

Segmented ViewThanks to Marcel Sabourin

NBDOT TRAMS Implementation

Transportation Related Attribute

Management System

(TRAMS)

NBDOT TRAMS Implementation Objectives

Implement Provincial Version of National Road Network (NBRN)

More Attributes or GeometryProvincial

More Attributes or GeometryMunicipal

National

NBDOT TRAMS Implementation Objectives

Implement Provincial Version of National Road Network (NBRN)

• Topological Differences– Junctions at County Boundaries

• Different Event Model– Roads as traversals, not events

• Convenient Denormalization– Control Section IDs on CSNM events

More Attributes or Geometry

More Attributes or Geometry

NBDOT TRAMS Implementation Objectives

Implement Provincial Version of National Road Network (NBRN)

Replace Legacy Systems

Transportation Network Management System (TNMS)

• Legal Roadway Database• Custom Application

– Oracle Forms Application– Oracle Data Warehouse– Periodic Snapshots (With synchronization to relate

historic to current data)

NBDOT TRAMS Implementation Objectives

Implement Provincial Version of National Road Network (NBRN)

Replace Legacy Systems

Transportation Network Management System (TNMS)

Highway Digital Map (HDM)• GIS street centerline• Caris to ArcGIS migration

NBDOT TRAMS Implementation Objectives

Implement Provincial Version of National Road Network (NBRN)

Replace Legacy Systems

Integrate Spatial and Logical Data

Road 1

CS 2

CS1

CS 4

CS 3

CS 6

CS 5

Road 2

Segment1

Segment 4

Segment 3

Segment 2

Segment 5

Segment 6

Segment 7

Segment 8

Anchor Sections and Control Sections from HDM

NBDOT TRAMS Implementation Objectives

Control SectionsImplement Provincial Version of National Road Network (NBRN) CS ID Length

1 32 23 44 25 36 5

Road Name1 Rt 22 Maple St

Asset CS Start EndBridge 4 1 1km 2kmSign 5 2 4.5km

Roads

Replace Legacy Systems

Integrate Spatial and Logical DataEvents

Anchor Sections and Control Sections from HDMControl Sections and Roads and Events from TNMS

NBDOT TRAMS Implementation Solution

Implement Provincial Version of National Road Network (NBRN)

Replace Legacy Systems

Integrate Spatial and Logical Data

Exor suite of network data management software• Network Manager , Spatial Server, Asset Manager,

Spatial ManagerReorganization to combine maintenance teams

Exor DatabaseSpatial (HDM) and

Logical (TNMS) DataOracle Database

Internet / Intranet

Exor Spatial Manager

ArcGIS

Exor ApplicationsBrowser/Applet

Other Systems/

Web Mapping

Exor Application ServerOracle Application Server

NBDOT TRAMS Implementation Project

Small Project

NBDOT TRAMS Implementation Project

Big Mistake

Network Restructuring

Before Restructuring

Road 1

CS 2

CS1

CS 4CS 3

CS 6

CS 5

Road 2

Segment1

Segment 4

Segment 3

Segment 2

Segment 5

Segment 6

Segment 7

Segment 8

Network Restructuring

After Restructuring

Road 1

CS 2

CS1

CS 4CS 3

CS 6

CS 5

Road 2

Road Element f81d4fae-7dec-11d0-a765-00a0c91e6bf6

Road Element e61d4fae-7dec-11d0-a765-01a0c91e6bf2

Road Element a41d4fae-7dec-11d0-a765-03a0c91e6bf4

Network Restructuring

Precision Issues

3.15

3.15

3.15

9.45

3.15 rounds to 3.23.2 + 3.2 + 3.2 = 9.69.45 rounds to 9.5

Adding rounded numbers introduces inaccuracy

Network Restructuring

Cardinality Issues

C

A

B

Result of merging B to C then A to CB

Result of merging B to A then C to AB

Network Restructuring

Lessons• Network data can be restructured• Think it through first

• Sequence is everyting• Plan to test• Plan to rework

Thank you for your time. Any questions?

Marc KratzschmarExor Corporation

mkratzschmar@exorcorp.com+1 (619) 521 2594