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					    METAINFORMATION SYSTEM
                 MIDAS
ON-LINE CATALOGUE OF GEODATA OF
      PUBLIC ADMINISTRATION


  Bronislava Horáková, Štěpán Kafka, Josef Hojdar
    Czech Association for Geoinformation (CAGI)




                               MIDAS - On-Line Catalogue of Geodata
                                           (http://www.cagi.cz/midas)
History
• GIS growth after 1990 - district office
• Absence of standards:
   –   Data caption, processing,
   –   Data structure, formats,
   –   Organization, data flow, updates, law
   –   Documentation, metadata.
• Massive demand for GIS data

• Decision CAGI: Metainformation System
   – overview of existing data for GIS community
   – tool for system analysis (coordinate requirements, removing
     duplicities, possible data sharing etc)


                                       MIDAS - On-Line Catalogue of Geodata
                                                   (http://www.cagi.cz/midas)
Development
• Pilot version in 1999
• Requirements:
   – Internet application
   – input/update via Internet
   – free access
   – European standards (CEN/TC 287) compatible
• Inter-department commission:
   –   coordination of metadata structure
   –   preparing of coding, controlled list etc.
   –   metadata extensions for special needs
   –   interchange XML format



                                          MIDAS - On-Line Catalogue of Geodata
                                                      (http://www.cagi.cz/midas)
 Structure
• Object-oriented:            Extensible structure, arbitrary relations
   – Classes:
                                   Object 1               Object 2
      • Dataset
                                             Relation 1-3
      • Organization                                         Relation 2-3
      • Person
                                               Object 3
      • Service
      • Document                            Relation 1-4
      • Application (software)
      • Event                               Object 4
   – Each class has common and specific attributes
   – Open classification mechanism




                                           MIDAS - On-Line Catalogue of Geodata
                                                       (http://www.cagi.cz/midas)
Today
• Public Administration central catalogue of
  metadata - supervised by OPIS
• Metadata content
   – cca 250 metadata datasets of central administrative bodies
      • problems with lack of metadata deposited on
        departments
      • problems with missing or unsufficient duties/rules for
        providing/updating metadata
   – cca 3200 metadata datasets of district offices
      • captured for analysis of district geodata content (due to
        reform of public adminstration, districts will be closed on
        2002-31-12)
      • GIS data will be delegated to successors (mainly
        regional offices)


                                       MIDAS - On-Line Catalogue of Geodata
                                                   (http://www.cagi.cz/midas)
Analysis - district offices
• Data acquisition
   – Organized in the half of 2001
   – Information of Datasets, HW, SW, people resources
   – MS Word Forms, data converted to MIDAS
• Analysis results
   – Data present big amount of finance as well as work
   – Variable extension and quality of GIS database
   – Uncompatible database contents and structures
   – Copyright and property problems
   – It is very hard to adopt the data to new structures (regions)
   – Regional offices faces to similar situation as districts before
     10 years (nearly no standardization, etc.)
   – results: http://gis.vsb.cz/midas/dokumenty/formular2.htm


                                        MIDAS - On-Line Catalogue of Geodata
                                                    (http://www.cagi.cz/midas)
Subprojects
• MIDAS Lite
  –   Software tool for OFF-LINE metadata acquisition
  –   Build on MDB database
  –   double sided data exchange with MIDAS
  –   free download: http://www.cagi.cz/midas
• MIDASKraj
  –   pilot project on Zlin Regional Office
  –   full implementation of MIDAS software
  –   using extensions for specific tasks on office
  –   metadata export/exchange to central MIDAS




                                       MIDAS - On-Line Catalogue of Geodata
                                                   (http://www.cagi.cz/midas)

				
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