location referencing for an asset management system … · location referencing for an asset...
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Location Referencing for An Asset Management System –A State DOT Approach
Jack Stickel
Alaska Department of Transportation and Public Facilities
6th National Conference on Asset ManagementAlaska DOT
6th National Conference on Asset ManagementAlaska DOT
• Enterprise linear referencing system
• Highway inventory program
• GIS environment for asset management
• User interface solutions
• GIS examples
Traditional Asset Management SystemMaintenance Management System
6th National Conference on Asset ManagementAlaska DOT
Enterprise Linear Referencing System
• Typically reference work activity & asset locations using proximity to established features:
- Cross streets- Bridges- Mileposts
• Milepost linear reference - does not meet accuracy or data integration requirements
- Many missing or non-existent - Distance between mileposts does not reflect
true distance between mileposts
Maintenance & Operations
6th National Conference on Asset ManagementAlaska DOT
Milepost User View
Route - MilepointReference System
Milepoint versus Milepost Linear Referencing System
6th National Conference on Asset ManagementAlaska DOT
Enterprise Linear Referencing System
• Reporting MMS work activities requires users to enter milepoint information – very frustrating
• Solution - Enterprise Linear Referencing that incorporates:
– Highway Inventory Program
– Spatial & linear measures in a geodatabase
– Asset management user interface
Maintenance & Operations
6th National Conference on Asset ManagementAlaska DOT
6th National Conference on Asset ManagementAlaska DOT
6th National Conference on Asset ManagementAlaska DOT
Highway Inventory ProgramData Collection Plan *
• What is intended purpose
• What data collection method provides the level of detail to meet this purpose
• Which assets to include
• What is best method available to collection data for selected assets
• What resources are available* Asset Management Data Collection Guide, 2005
Enterprise Linear Referencing System
6th National Conference on Asset ManagementAlaska DOT
Enterprise Linear Referencing System
• Comprehensive effort to collect centerline coordinates, linear measures, & highway features (intersections, mileposts, bridges, etc.) for base reference network
• NavStar Mapping data collection system: – Differential GPS– Inertial Navigation System (INS)
GyrocompassAltimeterDistance Measurement Instrument (DMI)Separate GPS for time
– Calculates linear measures and fills gaps in GPS signal– Accuracy + 15 feet as determined by DOT GIS/Mapping
Highway Inventory ProgramField Data Collection
6th National Conference on Asset ManagementAlaska DOT
Highway Inventory ProgramFeature Data Collection
• 8 core data business areas that cut across work centers:
– HSIP BMS PMS 511 Traveler Information
– Traffic RWIS TDP Maintenance Management System
• Two step calibration process against base reference network
– “Route Begin-to-End” milepoint calibration
– “Reference Feature-to-Reference Feature” segment milepoint calibration
• Proved to be safe, cost effective, and assured data synchronization with the reference network
Enterprise Linear Referencing System
6th National Conference on Asset ManagementAlaska DOT
Highway Inventory ProgramGeodatabase MMS Features
The geodatabase will store location and attribute information for high priority MMS features:
• Paved Shoulders• Rest Areas• Rumble Strips• Turn Outs• Signs
• Bridges• Culverts• Guardrails• Maintenance
Facilities
Enterprise Linear Referencing System
6th National Conference on Asset ManagementAlaska DOT
GIS Environment
ArcGIS 9 ArcIMS
OracleOracleDBMSDBMSServerServer
ArcSDEArcSDE
GIS Data
HAS Data
Desktop User Internet Access
BMS MMS PMS
Geodatabase
External Databases
MapOptix
STIP
6th National Conference on Asset ManagementAlaska DOT
Data Model Elements
«FeatureDataset»Transport Network
External Databases
Linear Referencing
Domains
«FeatureDataset»Jurisdictional Boundaries
Linear Referencing (Routes and Events)
Transportation Centerline network (Links, Nodes)
Jurisdictional Boundaries
External Databases (MMS, PMS, BMS, STIP)
Domains (Data Codes; Ranges; Business Rules)
GIS Environment
6th National Conference on Asset ManagementAlaska DOT
Point Events
Thematic Layers
Line Events
Routes
NetworksReference Network
BaseMaps
LRS
Digital Orthophotos
GIS Environment
6th National Conference on Asset ManagementAlaska DOT
Asset Management User Interface
• Import HAS/GIS reference feature data file to MMS (provides look-up table of features and their milepoints)
• Modify MMS user interface so users can select reference features (and enter + or – offset distance when appropriate); MMS software assigns appropriate milepoint
Enterprise Linear Referencing System
6th National Conference on Asset ManagementAlaska DOT
CAATS/RATTS 2002
6th National Conference on Asset ManagementAlaska DOT
6th National Conference on Asset ManagementAlaska DOT
6th National Conference on Asset ManagementAlaska DOT
6th National Conference on Asset ManagementAlaska DOT