Presentation on theme: "GIS-Based Rail Line Asset Viewer"— Presentation transcript:
1 GIS-Based Rail Line Asset Viewer Washington Metropolitan Area Transit AuthorityMinhua WangGIS Enterprise ArchitectGIS in Transit Conference 2013October 16-17, 2013GIS-Based Rail Line Asset Viewer
2 GIS-Based Rail Line Asset Viewer Issues to Visualize Rail Line AssetsLocation Referencing for Rail Line AssetsRail Line Linear Reference (LRS) ModelChallenges in Constructing WMATA Rail Line LRS ModelDesign of GIS-Based Rail Line Asset ViewerDemo of GIS-Based Rail Line Asset Viewer
3 Visualizing Rail Line Assets Engineer's ViewStraight Line Diagram: Track ChartWhat track chart tells you: track line and chain marker locationGIS Map ViewAsset location with X/Y coordinatesHow do you get X/Y locations for assets in underground tunnel?How to convert Track Chart location (one-dimension) to X/Y location?
4 Location Referencing for Rail Line Assets Common Location Referencing ModelsX/Y Coordinates: e.g., GPS locationsAddress LocationsPlace Name or Landmark LocationsLinear Referencing ModelDefinition: Location Referencing based on linear distanceDistance along specific route (track) and from the defined starting pointLocating points and linear events along specific route (track)Key componentsLRS route: network segment with spatial coordinates and measurements: e.g., track segment with chain markersLRS event: attribute tables with location reference data items: LRS route identifier and measurements: incidents, assets along track
5 Linear Referencing System Concept Emergency Exit at TrackBridge from toTrack 2Track 1Incident Happened at this location (chain marker )Platform from toEmergency Exit at TrackLinear Events:Bridge: location from ft to ft on Track line A1 & A2Platform: location from ft to ft on Track line A1 & A2Point Events:Emergency Exit: location at ft on Track A1 & A2Incident: location at ft on Track A1
6 Constructing WMATA Rail Line LRS Model Track geometryChallenge: Equation point for chain marker stationingTrack Segment definitionLRS DefinitionDefine Begin and Ending Chain Marker Values for a track segmentDual Track LRSLRS GenerationArcGIS LRS generation toolsEvent Data ProcessingStandardize trackside event location data structureLRS SegmentLRS Measures(single measure for point events, dual measures for linear events): chain marker valueTool to process event data automaticallyMake LRS EventsArcGIS LRS Tools
7 Design of GIS-Based Rail Line Asset Viewer Three Viewing PanelsStraight-line Diagram PanelAsset View PanelGIS Map PanelLRS SearchAlign Location Reference (from 1-D straightline diagram to 2-D map)Visualizing Asset Locations and AttributesIntegration with Other Applications based on LRS (e.g., Track Geometry, Workorder Management, Train Positions, etc.)
8 GIS-Based Rail Line Asset Viewer WMATA Rail Line Asset Viewer Interface
10 ConclusionLinear Referencing System (LRS) model is a preferred location referencing model for locating assets and incidents along Metro track networkDue to the complexity of Metro track network stationing (chain makers), a custom-built LRS model has been developed for Metro track networkBased on the LRS model, a custom-built Asset Viewer application has been developed to visualize assets (both point and linear assets and incidents) along the track networkThis Asset Viewer application provides a means to transfer one-dimension location referencing (Track Chart based) to two-dimension location referencing (GIS map based) hence enabling other GIS functions such as routing for locating assets and events along the track network and navigating to the locations
11 GIS-Based Rail Line Asset Viewer Questions?Thank You!
12 GIS-BASED RAIL LINE ASSET VIEWER Select chain marker range to show track segments and asset locations
13 GIS-BASED RAIL LINE ASSET VIEWER Use Auto Rotate View to Align Map Orientation with Track Straight Line Diagram
14 GIS-BASED RAIL LINE ASSET VIEWER Toggle Basemap option to turn on aerial imagery
15 GIS-BASED RAIL LINE ASSET VIEWER Select an asset from the asset panel to view selected asset attributes and the location on the map
16 GIS-BASED RAIL LINE ASSET VIEWER Resize map view area
17 GIS-BASED RAIL LINE ASSET VIEWER Switch track using Track Select Tool from the map
18 GIS-BASED RAIL LINE ASSET VIEWER Track straight line diagram automatically changed from C line to B lince
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