Geographic Information Systems Applications in Transit (2004) / Chapter Skim
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22 CHAPTER FOUR GENERAL CASE STUDIES SURVEY RESULTS INTRODUCTION To balance the findings of the 2002 and 2003 transit GIS surveys, which collected information from mainly small- and medium-sized transit agencies, case studies were conducted with the following large transit agencies: • • • • • Chicago Transit Authority (CTA) , King County Metro Transit, Miami–Dade Transit (MDT)
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23 TABLE 5 TRANSIT OPERATING STATISTICS OF CASE STUDY AGENCIES Agency Size of Fixed-Route Bus Fleet Annual Revenue Vehicle Miles (millions)
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24 FIGURE 7 Case studies: GIS applications development. F IGURE 8 Case studies: GIS training programs.
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25 TABLE 7 CASE STUDIES: GIS PLATFORMS AND NUMBER OF L IS Software Tri et Metro ransit NJ T Miami–Dade Transit Chicago Transit ICENSES King County G M T ransit Authority ArcView 3.x 25 20 12 31 ArcView 8.x 25 5 1 31 Arc/Info MapObjects 5 4 4 2 Site license 2 MGE 1 1 ial 1 ArcIMS, ArcSDE Arc E Ge ia MA M CA L Ar E, Ar S MapInfo Autodesk Map 2 2 1 2 Geomedia Intergraph 12 10 TransCAD Oracle Spat 2 12 Other SD omed Web /CO D/AV cSD cIM compatible GIS format such as shapefiles. Even so, the ay the data are specified may still make it difficult to inograms om a single vendor, whereas others like to use multiple overcome these problems through data import/export.
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26 TABLE 9 C A E T DIES: USE OF REMOTELY SENSED IMAGES S S U gency Aerial Photography Source How Often Is it Level of Accuracy/ Resolution (pixel Cost No. of Images A Purchased?
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27 TABLE 10 C ASE STUDIES: WEB–GIS SERVICES gency Internal Map Server Software Used to cess GIS Data Used to A cess GIS Applications? Provides RealTime Bus Map Server for Ext nal Customers A Ac c Location Information er TriMet ArcIMS Yes No Yes Yes King County Metro Transit B transportation NJ Transit Yes Yes Yes (train only)
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28 FIGURE 9 Case studies: GIS staff resources. nt of e GIS staff, especially if they are graded as IT profesonals.
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29 TABLE 12 CASE STUDIES: ORGANIZATIONAL LOCATION F GIS PROGRAM Agency Department O TriMet GIS section in IT division King County Metro Transit Distributed GIS within county NJ Transi Miami–D t GIS unit within planning d A within IT department ade Transit Information technology ser Transit Authority gy development epartment, DB vices Chicago Data services and technolo N tor. ra ti , u ere are some oncerns that if GIS becomes a back office IT activity it ill evolve into just another information system.
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