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Comparison of CEN, FGDC and ISO standards for metadata Ing. Jan Ruzicka Institute of Economics and Control Systems VŠB – Technical university Ostrava 17. listopadu 15, 708 33 Ostrava – Poruba E – mail: jan.ruzicka@vsb.cz
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Ruzicka, J.: Comparison of CEN, FGDC and ISO standards for metadata 2 Metadata –data set identification (title, version, etc.) overview (abstract, spatial schema, language, purpose of production, etc.) quality elements (lineage, positional accuracy, etc.) related documents related data sets spatial reference system extent (spatial, temporal) content (data structure, classification, etc.) administrative metadata (point of contact, distribution) metadata of metadata (author, dates) CEN,FGDC,ISO J R
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Ruzicka, J.: Comparison of CEN, FGDC and ISO standards for metadata 3 Compared standards Pre-standard "ENV 12657:1998 Geographic information – Data description – Metadata“ - CEN Working draft ISO/CD 19115 - ISO Standard for Digital Geospatial Metadata - FGDC J R
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Ruzicka, J.: Comparison of CEN, FGDC and ISO standards for metadata 4 Structure and expressive expedients of standards - ISO Textual description organised in paragraphs UML (Unified Modelling Language) diagrams –well-arranged –do not give full description of metadata elements Textual description organised in tables –not well arranged –necessary to UML diagrams –short names (XML, SGML) J R
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Ruzicka, J.: Comparison of CEN, FGDC and ISO standards for metadata 5 Structure and expressive expedients of standards - CEN Textual description organised in paragraphs EXPRESS-G schemas (diagrams) –well - arranged –do not give full description of metadata elements EXPRESS schemas –full description in textual form –structured text Textual description organised in tables J R
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Ruzicka, J.: Comparison of CEN, FGDC and ISO standards for metadata 6 Structure and expressive expedients of standards - FGDC Structured text –well - arranged –easily comprehensible –simple structures –full description in textual form –easy to use without knowledge of UML or EXPRESS J R
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Ruzicka, J.: Comparison of CEN, FGDC and ISO standards for metadata 7 Classification CEN - optional classification using thesaurus and thesaurus elements ISO - mandatory clsssification using category (list), optional by thesaurus FGDC - mandatory classification using thematic thesaurus FGDC and ISO do not give possibility to specify version and thesaurus administrator, CEN do not need classification - big defficiency J R
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Ruzicka, J.: Comparison of CEN, FGDC and ISO standards for metadata 8 Administrative metadata Point of contact –CEN - optional, FGDC and ISO - mandatory Data access –CEN - free text, FGDC, ISO - well -formed structure - access, usage and security of data Support services –CEN - free text, ISO - what to update and update frequency, FGDC update frequency only J R
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Ruzicka, J.: Comparison of CEN, FGDC and ISO standards for metadata 9 Metadata of metadata FGDC requires metadata author and description of metadata access, usage and security - it useful for metainformation systems FGDC does not make difference between date of birth and update date J R
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Ruzicka, J.: Comparison of CEN, FGDC and ISO standards for metadata 10 Mandatory metadata elements J R
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Ruzicka, J.: Comparison of CEN, FGDC and ISO standards for metadata 11 Conclusion ISO, FGDC - more concrete in metadata description CEN - gives only themes how to describe metadata elements FGDC, CEN - useful metadata elements optional ISO - useful metadata elements optional FGDC, CEN - well arranged documentation ISO - not well arranged documentation J R
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Ruzicka, J.: Comparison of CEN, FGDC and ISO standards for metadata 12 Recommendation ISO - international standards ISO replaces CEN Metainformation systems based on CEN - have to move to ISO –first phase: metadata exchange in conformity to ISO, three main targets – mandatory classification, mandatory point of contact and implementation of useful lists given by ISO standard Metainformation systems based on FGDC - in general - in conformity to ISO J R
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