Linear Reference System (LRS) · · 2009-05-28Linear Reference System (LRS) Steve Kadolph –...

AASHTO Technology Implementation Group (TIG)

FY 2007 AASHTO TIG Focus Technologies

Linear Reference System (LRS)

Steve Kadolph – Iowa DOTJonathan (J.J.) DuChateau – Wisconsin DOT

Oscar Jarquin – California DOTEric Abrams – Iowa DOT

Technology Implementation GroupTechnology Implementation Group

AASHTOAASHTO’’s TIG invests time and money to accelerate s TIG invests time and money to accelerate selected technology adoption by agencies nationwide. selected technology adoption by agencies nationwide. TIGTIG’’s lead states team objective is to share information s lead states team objective is to share information with AASHTO member agencies to improve the Nationwith AASHTO member agencies to improve the Nation’’s s transportation system transportation system The LRS TIG objectives areThe LRS TIG objectives are

Knowledge and experience related to LRS implementationKnowledge and experience related to LRS implementationWebinars to share experiences and educate othersWebinars to share experiences and educate othersCustomized state visitsCustomized state visitsIowaIowa’’s LRS Maintenance Tool and system at no charges LRS Maintenance Tool and system at no charge

NCHRP 20NCHRP 20--27 (2) LRS Model27 (2) LRS ModelLinear Referencing System Data ModelLinear Referencing System Data ModelDeveloped in response to the need to integrate linearly Developed in response to the need to integrate linearly referenced datareferenced dataIncludes Includes

Multiple linear referencing methods (LRM)Multiple linear referencing methods (LRM)Multiple cartographic representations Multiple cartographic representations Multiple Network RepresentationsMultiple Network RepresentationsMultiple Route NamesMultiple Route Names

Business data integration is supported through Business data integration is supported through transformations among methods, networks and transformations among methods, networks and cartographic representations by associating with a cartographic representations by associating with a central linear datumcentral linear datum

What Does a 20What Does a 20--27 (2) System 27 (2) System ContainContain

Spatial representation of a transportation systemSpatial representation of a transportation systemAccurate CenterlineAccurate CenterlineMultiple Cartographic abstraction layersMultiple Cartographic abstraction layers

Datum most stable layer over timeDatum most stable layer over timeNetwork LayerNetwork Layer

Links and Nodes that define the networkLinks and Nodes that define the networkLRM LocationLRM Location

Data required for those methodsData required for those methodsPrograms and interfaces to supply a LRS location to Programs and interfaces to supply a LRS location to business databusiness data

What Does a 20What Does a 20--27 (2) System 27 (2) System Does Not ContainDoes Not Contain

Business data is separated from the 20Business data is separated from the 20--27 27 (2) model order to minimize the impact on (2) model order to minimize the impact on existing business dataexisting business data

Why Implement a 20Why Implement a 20--27 (2) Model27 (2) Model

Single source for transportation systemsSingle source for transportation systemsNavigable networkNavigable networkAs many LRMs, routes and cartographies As many LRMs, routes and cartographies as neededas neededMinimizes changes to existing business Minimizes changes to existing business datadataCan support needs of multiple business Can support needs of multiple business areasareas

Marketing Plan forMarketing Plan forLinear Referencing SystemLinear Referencing System

Assess LRS Needs and Contacts in Each StateAssess LRS Needs and Contacts in Each StateDevelop PowerPoint Presentation, Brochure and Develop PowerPoint Presentation, Brochure and Posters Posters Develop Value Analysis Document (Contractor) Develop Value Analysis Document (Contractor) Develop and Host Webinar(s)Develop and Host Webinar(s)Give Presentation and/or Workshop at TRB, Give Presentation and/or Workshop at TRB, GIST and AASHTO IS Conferences GIST and AASHTO IS Conferences Visit States Offering Invitation Visit States Offering Invitation Assess LRS Level of Knowledge Transfer and Assess LRS Level of Knowledge Transfer and Implementation Success Implementation Success Final ReportFinal Report

TIG LRS Team MembersTIG LRS Team MembersIowa Lead StateIowa Lead State

Peggi Knight Peggi Knight ( Team Leader)( Team Leader)

Eric AbramsEric Abrams (Gis Coordinator)(Gis Coordinator)

Karen Carroll Karen Carroll (LRS Manager)(LRS Manager)

Mike Clement Mike Clement (QA LRS)(QA LRS)

Steve KadolphSteve Kadolph (Technical Exp.)(Technical Exp.)

Ryan Wyllie Ryan Wyllie (QA LRS)

Other StatesOther StatesDavid Blackstone (Ohio)David Blackstone (Ohio)Jonathan (J.J.) DuChateau Jonathan (J.J.) DuChateau (Wis)(Wis)John Farley (N. Car.)John Farley (N. Car.)Oscar JarquinOscar Jarquin (Calif.)(Calif.)Thomas Martin (Minn.)Thomas Martin (Minn.)

oo Non StateNon StateTim Bisch Tim Bisch (Bentley Systems, Inc.)(Bentley Systems, Inc.)

Dave Fletcher Dave Fletcher (Geographic (Geographic Paradigm Computing, Inc. )Paradigm Computing, Inc. )

Mark Sarmiento Mark Sarmiento (FHWA)

(QA LRS)

(FHWA)

IowaIowa’’s LRS Experiences LRS Experience

AgendaAgenda

What IowaWhat Iowa’’s LRS includess LRS includes

What do the DOTWhat do the DOT’’s business units gains business units gain

What allowed Iowa to succeedWhat allowed Iowa to succeed

IowaIowa’’s LRSs LRS

Implementation of NCHRP 20Implementation of NCHRP 20--27 27 model. Which separates business model. Which separates business data from the location components data from the location components of linear features (roads, navigable of linear features (roads, navigable rivers, railroads, pipelines, etc.).rivers, railroads, pipelines, etc.).

NCHRP 20NCHRP 20--27 Model27 Model

LRS Components

CoordinateRoute

ReferencePost

CoordinateRoute Milepoint Stationing Literal

Description

BaseRecordCrash PMIS Inventory Project

Data Program

CenterlineRepresentation 2



AddressRange

LRS ComponentsLRS Components(all public roads 114,000 miles)(all public roads 114,000 miles)

CartographyCartographyTraveled Way Spatial Traveled Way Spatial Roadway Spatial Roadway Spatial

Datum Datum (Anchor Sections & Points)(Anchor Sections & Points)

Network Network (Transport Links & Nodes)(Transport Links & Nodes)

RoutesRoutesParsed NamesParsed NamesPathsPaths

LRM Components (i.e. Reference Post)LRM Components (i.e. Reference Post)

Transformations between Transformations between supported business location supported business location referencing methods (LRM)referencing methods (LRM)

A common linear description of the network that can relate all the methods.

LRM

LRM

LRM

LRM

LRM

LRM

DatumTransform

Transform

Transform

How does LRS benefit the DOTHow does LRS benefit the DOTImproved AccuracyImproved Accuracy

Entire road system (all public roads) are Entire road system (all public roads) are created based upon same standardcreated based upon same standardA separate abstraction layer call Roadway A separate abstraction layer call Roadway exist that provides a single representation exist that provides a single representation of divided roadwaysof divided roadwaysThe system is represented over time (from The system is represented over time (from 1/1/2001) 1/1/2001)

How does LRS benefit the DOTHow does LRS benefit the DOTCentral location of dataCentral location of data

Route names for all roadway systemsRoute names for all roadway systems

One navigable networkOne navigable network

Centerline for all roadsCenterline for all roads

History of road network History of road network

How does LRS benefit the DOTHow does LRS benefit the DOTClearly defined rules and practicesClearly defined rules and practicesLRM usage and resultsLRM usage and results

Data staged has same location componentData staged has same location componentProcesses and QC processes clearly definedProcesses and QC processes clearly defined

Metadata for all LRS componentsMetadata for all LRS componentsSource for centerlines identified and datedSource for centerlines identified and datedWho owns LRS components knownWho owns LRS components known

LRS how did Iowa succeedLRS how did Iowa succeed

Business case for creation of LRSBusiness case for creation of LRS

Division Level SponsorsDivision Level Sponsors

Business data kept separate from locationBusiness data kept separate from location

Business unit ownership LRSBusiness unit ownership LRS

Active project management Active project management

Implementation IssuesImplementation Issues

Time span (Time span (19981998 20012001--2009)2009)Digitize roads (2001Digitize roads (2001--2005)2005)Develop maintenance tool (2003Develop maintenance tool (2003--2008)2008)Create LRS components (2004Create LRS components (2004--2009)2009)

Cost to develop maintenance toolCost to develop maintenance toolDollarsDollarsMultiple vendorsMultiple vendors

WisconsinWisconsin’’s LRS Experiences LRS Experience

WisconsinWisconsin’’s LRSs LRSSimilarities to IowaSimilarities to Iowa

LRS Components

CoordinateRoute

ReferencePost

CoordinateRoute Milepoint Stationing Literal

Description

BaseRecordCrash PMIS Inventory Project

Data Program




AddressRange

Most concepts in IowaMost concepts in Iowa’’s slides also apply s slides also apply to WIto WI’’s implementations implementationSeparate business data components from Separate business data components from LRSLRSLinear Datum that serves as a LRS Linear Datum that serves as a LRS ““hubhub””Multiple LRMs supported Multiple LRMs supported (each tied to the (each tied to the Linear Datum)Linear Datum)

LRM

LRM

LRM

LRM

LRM

LRM

Datum

WisconsinWisconsin’’s LRSs LRSDifference from IowaDifference from Iowa

WIWI’’s Linear Datum & Network are one and the s Linear Datum & Network are one and the samesameBuilt state roads (1993), then local roads later Built state roads (1993), then local roads later (2002)(2002)InIn--house solution house solution (mainly because commercial (mainly because commercial solutions didnsolutions didn’’t exist at this time)t exist at this time)Best practice to store Linear Datum location Best practice to store Linear Datum location instead of LRM for business event datainstead of LRM for business event dataIowa has put more emphasis on statistics for Iowa has put more emphasis on statistics for determining linear measurement accuracydetermining linear measurement accuracy

WisconsinWisconsin’’s Experiences Experience

17 years production experience with these 17 years production experience with these LRS conceptsLRS conceptsDesign driven by Information Engineering Design driven by Information Engineering principlesprinciplesLRS design was essentially a data LRS design was essentially a data modeling & normalization exercisemodeling & normalization exercise

Results in many of the 20Results in many of the 20--27 concepts27 conceptsAllows management of one LRS Allows management of one LRS component not to dictate management of component not to dictate management of another LRS componentanother LRS component


Designed so linear data processing can be Designed so linear data processing can be done outside of GIS softwaredone outside of GIS softwareOnly Only ““GISGIS”” layer required is a roadway layer required is a roadway centerline representationcenterline representationLRS transformation processes to create LRS transformation processes to create cartographic representation of business cartographic representation of business datadata


Conceptual & design details are important Conceptual & design details are important to understandto understand

Entity Definitions, Business Rules, Use CasesEntity Definitions, Business Rules, Use Cases

Such as:Such as:What is a What is a ““roadroad””??Where does a route start/end?Where does a route start/end?What events cause birth/death of a LRS What events cause birth/death of a LRS object?object?


Implementation considerations for LRS Implementation considerations for LRS entities need to be weighedentities need to be weighed

Is each linear location uniquely described?Is each linear location uniquely described?How many nodes should represent an How many nodes should represent an intersection?intersection?What constitutes a divided roadway?What constitutes a divided roadway?What point should be used for What point should be used for merging/diverging roadways?merging/diverging roadways?


Additional LRS functionality considerationsAdditional LRS functionality considerations(Some things not explicitly mentioned in 20(Some things not explicitly mentioned in 20--27)27)

Ability to associate still valid portions of old Ability to associate still valid portions of old Anchor Sections to its replacement(s)Anchor Sections to its replacement(s)Ability to associate opposite direction Anchor Ability to associate opposite direction Anchor SectionsSections

The temporal aspect of this data is much The temporal aspect of this data is much harder than it seemsharder than it seems

CaliforniaCalifornia’’s LRS Experiences LRS Experience

California Business DriverCalifornia Business Driver……Corridor ManagementCorridor Management

Local Jurisdiction 2 – Traffic Signal System


Bus Company – AVL system

State DOT – Freeway Management System

Regional Rail Agency – Train Management System

P



Bus Company – AVL system

State DOT – Freeway Management System

Regional Rail Agency – Train Management System

P

Multiple LRMMultiple LRM’’ss

County Route Postmile

ORA 405 R 23.000

County Route KiloPost

ORA 405 R 33.877

Service Oriented Architecture Service Oriented Architecture (SOA)(SOA)

Security

Internet

Other TIMIGIS

SOA(Service Oriented Architecture)

Java/XML Message Bus

TASASData Files

Applications

TSM

Hwy.Inven.

HPMS

Programming

TrafficVolume

OE-PSE

PMS

TMCs(loops, CMS, etc.) Web

Pages

SOA output via GIS =Planning, PID, Design, Proj. Mgt., Constr., Operations, etc. for system performance, geometrics, etc.

Other

CTIS PEARParcels

Others

GoogleEarth

CAD

Others

Public

StateAgencies

Locals

CT PASSMain Frame External Sources

Linear Referencing

Search FunctionsMapping

Other Functions

St. Hwy Inv.

HPMS Envir. Doc MgtAsset Mgt

SHARED FUNCTIONS

Identifying Common SOA Identifying Common SOA ComponentsComponents

Common Mapping Functions Common Search Functions

Sharable Functions PEAR Specific Functions

Common Metadata Functions

TIMI Specific Functions

CTIS Specific Functions

Display associated media file Export RSS feed

Read traffic information

sources Display attribute information

window

Import CTIPS projects

Edit planned project

Login

Manage Users

Validate location

Map Navigation Functions

Map Cartographic Functions

Metadata search

Map Components(scale bar, north

arrow, etc)Legend Functions

Mao List Functions Map Print Functions

Edit metadata

Help Functions

Attribute Search

Common table functions

Print Report

Clear Project Set

Login

Manage Users

Validate location

Map Navigation Functions

Map Cartographic Functions

Search for project

Search listMetadata search

Map Components(scale bar, north

arrow, etc)Legend Functions

Map Print Functions Spatial Search and Select

Edit metadata

Help Functions

Attribute Search Project Set Overlap Report

Project Set Summary Report

(average cost, total cost, etc)

Project Set ExportCommon table functions

Print Report

Search Adjoining Projects

Submit, Review and Approve

Create audit log

Upload site data

Spatially review information

Initiate PEAR Request

Define activities and resources

Track activities

Develop cost estimates

ID need for risk assessment

Append data, maps to request

Map Specialty Scoping Areas

Compile documentPublish document

Office of GISService Oriented

Architecture Diagram

(Confederated Level)

10/30/06

Map List Functions

GIS Files

Cadastral

CADDPost Mile Info

Geodatabase / Web ServicesGeodatabase / Web ServicesMicroStationMicroStation

Geospatial DataGeospatial Data

GISGIS

WebWeb

GoogleGoogleEarthEarth

Geospatial Data ManagementGeospatial Data Management

Postmile Lookup ToolPostmile Lookup Tool

ArcGISArcGIS Tool BarTool Bar

QuestionsQuestions

State Name and who you representState Name and who you representAsk question to the panel Ask question to the panel

The LRS TIG objectives areThe LRS TIG objectives are

••Knowledge and experience related to LRS implementationKnowledge and experience related to LRS implementation••Webinars to share experiences and educate othersWebinars to share experiences and educate others••Customized state visitsCustomized state visits••IowaIowa’’s LRS Maintenance Tool and system at no charges LRS Maintenance Tool and system at no charge

Technology Implementation GroupTechnology Implementation Group

The LRS TIG objectives areThe LRS TIG objectives areKnowledge and experience related to LRS implementationKnowledge and experience related to LRS implementationWebinars to share experiences and educate othersWebinars to share experiences and educate othersCustomized state visitsCustomized state visitsIowaIowa’’s LRS Maintenance Tool and system at no charges LRS Maintenance Tool and system at no charge

Linear Reference System (LRS) · · 2009-05-28Linear Reference System (LRS) Steve Kadolph –...

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