integrating gis with linked data - europa
TRANSCRIPT
INTEGRATING GIS WITH LINKED DATA
SPATIAL OBJECT OF INTEREST ON THE WEB
Adam IwaniakWroclaw University of Environmental and Life Sciences, Poland
Iwona Kaczmarek, Marek StrzeleckiThe Wroclaw Institute of Spatial Information and Artificial Intelligence, Poland
INSPIRE conference 2016, Barcelona 26th-30th, September
BENEFITS FROM INSPIRE FOR CITIZENS
• How often do you use INSPIRE data?• Do you have any INSPIRE data in your smartphone?• How many steps you need to use INSPIRE data?• How can you do this if you are not GIS expert user?
KEY QUESTIONS
• How to make spatial data more attractive ?• How to make spatial data more available and accessible on mobile devices?
• It is already more than 2 200 000 mobile applications on Google Store and the next one will probably not solve the problem.
INCREASE THE ATTRACTIVENESS OF DATA
1. Easily accessible, easy to discover structured data.2. In a manner that allows effective use, processing and
integration.3. In a new human‐readable and machine‐readable
form.4. With added value:
• Enriched with new attributes and results from spatialanalyses.
• With better quality: completeness, logicalconsistency, thematic accuracy, positional accuracy, temporal accuracy .
• Integrated with metadata.• With links to other resources available on the Web.
LARGE INFORMATION POTENTIAL
• INSPIRE harmonised databases and geoportalscontain the information which allows gettinganswers for a lot of questions, which are importantfor citizens.
• Making spatial data more available and easy to use in your smartphone /Workshop SDW‐BP, Andrea Perego/.
(X)HTML + RDFa
A.Iwaniak, The INSPIRE Conference 2014, Aalborg, 16-20 June 2014
INSPIRE metadata in HTML + RDFa
August, 2016; https://pzgik.geoportal.gov.pl/semantic-metadata/
compliant with GeoDCAT-AP
GeoDCAT-AP
CONVERSION OF INSPIRE METADATA
THE ADVANTAGES
• With new representation, old metadata is available for web search engines.
• New form /human‐readable and machine‐readable / • Metadata is enriched with links to other resources:GEMET, GeoNames, DBpedia and metadata portals.
HOWEVER, citizens with their smartphones do not need metadatanor spatial data, they need answers for their questions.
RDF HTML+RDFa
Spatial Data Base
SOoI
Geoportal
GoogleIndexing
INSPIRE DATA IN HTML + RDF
SOoI – Spatial Object of Interest /point, line and area/
a
EXAMPLES
1. Wrocław – Sobótka (red trail) – CYCLE ROUTE2. St. Sigmund and St. Hedwig’s Church
HTML Metadata files include external links to objects locatedwithin predefined distance.
WROCŁAW – SOBÓTKA (RED TRAIL) –CYCLE ROUTE
St. Sigmund and St. Hedwig’s Church
ASSUMPTIONS
• There is no need for publishing all of the spatial objects. Onlyselected Spatial Objects of Interest (SOoI) such as: cycleroutes, parcels for sale, monuments, public administrationoffices.
• The key is to link data and metadata with other externalresources. Links can represent topological relations such as "nearby", "close to" or can be a reference to article publishedon the Web.
• It is important to enrich metadata with additionalinformation, which can be the results of complex spatialanalyses such as insolation analysis, medium availability, distance to metro stations or parks.
• Attributes, links and enriched data available on web page arethe core metadata and indexing source for web searchengines.
CHALLENGES
• Depending on the purpose, one object can havemultiple HTML+RDFa pages, for example: describingbuilding as a historic building and the same buildingas a cultural institution or public administrationoffice. This means that one spatial object class can be represented with many metadata profiles.
• The challenge is to implement solutions which usethis data to deliver answers for common questions.
SPATIAL DATA TO RDF CONVERSION
Dxf, GMLfiles
Spatial Analysis
RDF RepositoryAllegroGraph
GeoMedia
SPARQL
RDFfiles
Import/export
SQLWIZIPISI
SemanticComponents
Import/export
DB
Graph Analysis
LINKING SPATIAL OBJECTSExampele of connecting churches from topographic databases with their counterparts from Dbpedia with RDF links.
DATA ENRICHMENT
OpenStreetMap + Dbpedia
• INSPIRE databases contain the information that allows gettinganswers for a lot of questions, which are important for citizens.
• However, creating semantic annotations manually is time-consuming and there is a little understanding of semantictechnologies among public bodies
• More intuitative tools are needed. WIZIPISI Semantic Components, designed as a bridge between geospatial domain and SemanticWeb.
• Only if data is open, creating HTML+RDFa metadata available on the Web are opportunity for value added reseller. If the data is"closed", public administration should be responsible for thisk task. Citizens should have the right to easily accessible public information.
CONCLUSIONS
Thank you for your attention