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Making Swedish Environmental Geodata INSPIRE Conformant: A Harmonization Case Study

Hedefalk, Finn LU and Östman, Anders (2011) In Kart och Bildteknik: mapping and image science 3. p.30-37
Abstract
The European project Nature-SDIplus has developed data and metadata specifications for three INSPIRE Annex III themes: Habitat and Biotopes, Bio-geographical regions and Species distributions. These serves as a foundation for the thematic groups developing the corresponding INSPIRE specifications. The aim of this study is to test a data harmonization approach to make Swedish environmental geodata and metadata compliant with these specifications. In the harmonization process, we use offline transformations that are split into one spatial and one non-spatial part, and standardized formats to allow vendor neutrality. Moreover, we extend the compliance tests to the data and metadata specifications by validating against both eXtensible Markup... (More)
The European project Nature-SDIplus has developed data and metadata specifications for three INSPIRE Annex III themes: Habitat and Biotopes, Bio-geographical regions and Species distributions. These serves as a foundation for the thematic groups developing the corresponding INSPIRE specifications. The aim of this study is to test a data harmonization approach to make Swedish environmental geodata and metadata compliant with these specifications. In the harmonization process, we use offline transformations that are split into one spatial and one non-spatial part, and standardized formats to allow vendor neutrality. Moreover, we extend the compliance tests to the data and metadata specifications by validating against both eXtensible Markup Language (XML)-schema and Schematron. Finally, we identify harmonization processes that may be costly or have negative impacts on data quality. The harmonized data and metadata are thereafter published as network services compliant with OGC Web Service specifications. The output from our method is data and metadata that are valid to the Nature-SDIplus data specifications and metadata profiles. Although the usage of standardized formats facilitates vendor neutrality, the nonspatial transformation procedures expressed in interoperable languages seem to be insufficient to execute all the mapping rules. Therefore, some of these transformations cannot be executed in a vendor neutral environment without modifications. Furthermore, by splitting the harmonization into two manageable parts, we avoid some limitations about XML schema translations in existing spatial transformation tools. Additional findings are: (1) by extending the validation with Schematron tests, we find non-compliances that have been missed during the XML schema tests; (2) costly processes are identified, which are caused by missing elements and by unstructured information given as comments; and (3) degradation of the positional and thematic accuracy occur during the harmonization. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
INSPIRE, Geodata harmonization, ETL, OGC Web services, Nature-SDIplus, Validation, Data quality
in
Kart och Bildteknik: mapping and image science
volume
3
pages
30 - 37
publisher
Swedish Cartographic Society
ISSN
1651-792X
language
English
LU publication?
yes
id
932c2d5a-8b78-4065-a252-480c5a62d3fd (old id 7854320)
alternative location
http://www.kartografiska.se/images/stories/kart_o_bildteknik/KB_3_vet_2011_web.pdf
date added to LUP
2015-09-03 13:28:47
date last changed
2016-04-16 10:01:23
@misc{932c2d5a-8b78-4065-a252-480c5a62d3fd,
  abstract     = {The European project Nature-SDIplus has developed data and metadata specifications for three INSPIRE Annex III themes: Habitat and Biotopes, Bio-geographical regions and Species distributions. These serves as a foundation for the thematic groups developing the corresponding INSPIRE specifications. The aim of this study is to test a data harmonization approach to make Swedish environmental geodata and metadata compliant with these specifications. In the harmonization process, we use offline transformations that are split into one spatial and one non-spatial part, and standardized formats to allow vendor neutrality. Moreover, we extend the compliance tests to the data and metadata specifications by validating against both eXtensible Markup Language (XML)-schema and Schematron. Finally, we identify harmonization processes that may be costly or have negative impacts on data quality. The harmonized data and metadata are thereafter published as network services compliant with OGC Web Service specifications. The output from our method is data and metadata that are valid to the Nature-SDIplus data specifications and metadata profiles. Although the usage of standardized formats facilitates vendor neutrality, the nonspatial transformation procedures expressed in interoperable languages seem to be insufficient to execute all the mapping rules. Therefore, some of these transformations cannot be executed in a vendor neutral environment without modifications. Furthermore, by splitting the harmonization into two manageable parts, we avoid some limitations about XML schema translations in existing spatial transformation tools. Additional findings are: (1) by extending the validation with Schematron tests, we find non-compliances that have been missed during the XML schema tests; (2) costly processes are identified, which are caused by missing elements and by unstructured information given as comments; and (3) degradation of the positional and thematic accuracy occur during the harmonization.},
  author       = {Hedefalk, Finn and Östman, Anders},
  issn         = {1651-792X},
  keyword      = {INSPIRE,Geodata harmonization,ETL,OGC Web services,Nature-SDIplus,Validation,Data quality},
  language     = {eng},
  pages        = {30--37},
  publisher    = {ARRAY(0x8dcee48)},
  series       = {Kart och Bildteknik: mapping and image science},
  title        = {Making Swedish Environmental Geodata INSPIRE Conformant: A Harmonization Case Study},
  volume       = {3},
  year         = {2011},
}