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Integration and analysis tools for transit gis data

Abendc. Transit GIS 2013. Routenwahl im IV - Teil 2. Klaus Nökel. Integration and analysis tools for transit gis data. Chetan Joshi, Portland. agenda. Introduction Map Matching – GTFS Integration Analysis Tools. Chetan Joshi, Portland. introduction.

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Integration and analysis tools for transit gis data

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  1. Abendc Transit GIS 2013 Routenwahl im IV- Teil 2 Klaus Nökel Integration and analysis tools for transit gis data • Chetan Joshi, Portland

  2. agenda Introduction Map Matching – GTFS Integration Analysis Tools • Chetan Joshi, Portland

  3. introduction • The availability and quality of transit data has greatly improved in recent years. • Transit agencies maintain detailed transit data, but it is typically not integrated into MPO models or the other way… • GTFS introduced a common data exchange platform for transit data... • No direct integration with the street network • No integrated analysis tools are available All of this data requires integration to be useful for planning...

  4. Map matching • Tool for integration of transit line geometries with any given street network.. • Works by matching a given sequence of coordinates to a target link/polyline geometry within a given snap radius Target street network Source transit line geometry

  5. Map matching • Most likely link sequence is based on weighted score of length and snap distance with two calculation variants… • Incremental matching method – for dense point sequences • Global matching method – for sparse point matching

  6. Map matching • Useful in matching inaccurate geometries…

  7. Map matching • Search graph can be restricted to a specific mode in the network… • Particularly useful in matching multi-modal networks

  8. Map matching in the real world • Integrated street and transit network for Oregon State DOT 33 Transit Agencies 1221 Line Routes 5 Modes 1.5 Million Links in Street Network

  9. Map matching data transferred • All transit lines, stop pointsand timetables including calendar restrictions…

  10. Integrated supply demand analysis • Streamlined interaction with regional travel demand model data • Integrated modeling of actual transit fleet • Integrated modeling of fares and revenue based on ridership data from demand models ** **Scherr. W, Fisher. I "Regional Application of 24-Hour Dynamic Transit Assignment", 12th TRB Transportation Planning Application Conference, Houston TX, May 2009

  11. Spatial analysis tools • Written in GDAL… • GDAL or Geospatial Data Abstraction Library is an open source library that can be used for manipulating geospatial raster data and for manipulating geospatial vector data. • It is offered on multiple platforms including python and includes powerful geo-processing functionality.

  12. Transit analysis tools • How is it connected with third party tools ? COM API COM Compliant third party software

  13. Transit analysis tools Buffers around transit lines – for analysis of catchment area

  14. Transit analysis tools Time dependent shortest path calculation..

  15. Transit analysis tools 2D Isochrones – for accessibility/proximity analysis of POIs from stops or zones Get land use and demographic data such as households, employment, shopping within a given time/distance from a selected point…

  16. Transit analysis tools Schematic line diagram generation for simplification of network views

  17. Acknowledgements • Special thanks to colleagues in Germany: • Klaus Nökel • Martin Seeger • Arne Schneck

  18. Questions ?

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