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Database Development for Load-Restricted Zone in Texas

Database Development for Load-Restricted Zone in Texas. By Pithon Vithayasricharoen. Objectives. To develop a procedure for projecting the load-restricted zones on a road map of Texas To understand Linear Referencing and Dynamic Segmentation in ArcGIS

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Database Development for Load-Restricted Zone in Texas

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  1. Database Development for Load-Restricted Zone in Texas By Pithon Vithayasricharoen

  2. Objectives • To develop a procedure for projecting the load-restricted zones on a road map of Texas • To understand Linear Referencing and Dynamic Segmentation in ArcGIS • To perform a pilot test on the road system in Travis County in order to verify the effectiveness of the developed procedure

  3. What is Load-Restricted Zone? Sections of the transportation facilities legally posted to restrict excessive loading

  4. Linear Referencing • Using x,y,m coordinate system. • Each point along a linear feature has a measure value (m value)

  5. Dynamic Segmentation • Allows multiple sets of attributes to be associated with any portion of a linear feature. • Consists of 2 components • Routes • Route Events • A unique identifier (Highway Name) • Measure Values (M Values) • Point Events • Line Events

  6. Data Sources • The Street Network Shapefile of Travis County from BTS web site • Load-Restricted Zone Database from TxDOT • Milepoint Reference Marker Database from CTR

  7. Create the Routes • Requirement • A unique identifier • A measurement system

  8. Aggregate features

  9. Export Shapefile to Geodatabase Enable the Measure Values (M Values) of TravisRoad Feature Class Contains M Values is set to Yes

  10. M Values are NaN (Not a Number) M Values at Each Vertex

  11. VBA Script Code Assign M Values • IMSegmentation Important Interface for Dynamic Segmentation in ArcGIS • SetAndInterpolateMsBetween Method for interpolating M values between minimum and the maximum M Values

  12. M Values Populated by VBA Script Code

  13. 1.984 + 1.206 = 3.19 0.040 – 0.040 = 0.00 Route Events (Load-Restricted Zone) 7.813 9999 1.984 5.969 0.040 0558 0562 3.984 0556 0.000 0000 0560

  14. Create the Route Events Table • Using VB Code • Access Both Database • Create the Route Events Table in Ms Access • Create the Route Events Table for each county

  15. Add Route Event Table in ArcGIS

  16. Results

  17. Future Work • Perform the Dynamic Segmentation for every county in the State of Texas • Develop the GIS-integrated database for Load-Restricted Zone of the highway network in the State of Texas

  18. Acknowledgment • Dr. David R. Maidment • Dr. Zhanmin Zhang • Venkatesh Merwade • Uarporn Nopmongcol

  19. Questions ?

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