{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,26]],"date-time":"2026-06-26T21:49:28Z","timestamp":1782510568839,"version":"3.54.5"},"reference-count":84,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2020,3,16]],"date-time":"2020-03-16T00:00:00Z","timestamp":1584316800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJGI"],"abstract":"<jats:p>The availability of timely, accessible and well documented data plays a central role in the process of digital transformation in our societies and businesses. Considering this, the European Commission has established an ambitious agenda that aims to leverage on the favourable technological and political context and build a society that is empowered by data-driven innovation. Within this context, geospatial data remains critically important for many businesses and public services. The process of establishing Spatial Data Infrastructures (SDIs) in response to the legal provisions of the European Union INSPIRE Directive has a long history. While INSPIRE focuses mainly on \u2019unlocking\u2019 data from the public sector, there is need to address emerging technological trends, and consider the role of other actors such as the private sector and citizen science initiatives. The objective of this paper, given those bounding conditions is twofold. Firstly, we position SDI-related developments in Europe within the broader context of the current political and technological scenery. In doing so, we pay particular attention to relevant technological developments and emerging trends that we see as enablers for the evolution of European SDIs. Secondly, we propose a high level concept of a pan-European (geo)data space with a 10-year horizon in mind. We do this by considering today\u2019s technology while trying to adopt an evolutionary approach with developments that are incremental to contemporary SDIs.<\/jats:p>","DOI":"10.3390\/ijgi9030176","type":"journal-article","created":{"date-parts":[[2020,3,17]],"date-time":"2020-03-17T09:27:41Z","timestamp":1584437261000},"page":"176","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":66,"title":["From Spatial Data Infrastructures to Data Spaces\u2014A Technological Perspective on the Evolution of European SDIs"],"prefix":"10.3390","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0411-741X","authenticated-orcid":false,"given":"Alexander","family":"Kotsev","sequence":"first","affiliation":[{"name":"European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9993-1072","authenticated-orcid":false,"given":"Marco","family":"Minghini","sequence":"additional","affiliation":[{"name":"European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert","family":"Tomas","sequence":"additional","affiliation":[{"name":"European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1835-5777","authenticated-orcid":false,"given":"Vlado","family":"Cetl","sequence":"additional","affiliation":[{"name":"European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Lutz","sequence":"additional","affiliation":[{"name":"European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2020,3,16]]},"reference":[{"key":"ref_1","unstructured":"European Parliament and European Council (2007). Directive 2007\/2\/EC of the European Parliament and of the Council of 14 March 2007 establishing an Infrastructure for Spatial Information in the European Community (INSPIRE). Off. J. Eur. Union, L 108, 1\u201314."},{"key":"ref_2","unstructured":"European Commission (2020, February 10). INSPIRE Roadmap. Available online: https:\/\/inspire.ec.europa.eu\/inspire-roadmap."},{"key":"ref_3","unstructured":"European Commission (2020, February 28). European Data Strategy. Available online: https:\/\/ec.europa.eu\/info\/strategy\/priorities-2019-2024\/europe-fit-digital-age\/european-data-strategy_en."},{"key":"ref_4","unstructured":"European Commission (2020, February 09). The New European Interoperability Framework. Available online: https:\/\/ec.europa.eu\/isa2\/eif."},{"key":"ref_5","unstructured":"Bernard, L., Craglia, M., Gould, M., and Kuhn, W. (July, January 29). Towards an SDI research agenda. Proceedings of the 11th EC GIS & GIS Workshop-ESDI: Setting the Framework-Abstracts Handbook, Alghero, Sardinia, Italy."},{"key":"ref_6","unstructured":"Huadong, G., Goodchild, M.F., and Annoni, A. (2020). Geospatial Information Infrastructures. Manual of Digital Earth, Springer."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"353","DOI":"10.1007\/s12145-014-0160-8","article-title":"Building bridges: experiences and lessons learned from the implementation of INSPIRE and e-reporting of air quality data in Europe","volume":"8","author":"Kotsev","year":"2015","journal-title":"Earth Sci. Informatics"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Cetl, V., Tomas, R., Kotsev, A., de Lima, V.N., Smith, R.S., and Jobst, M. (2019). Establishing Common Ground Through INSPIRE: The Legally-Driven European Spatial Data Infrastructure. Service-Oriented Mapping, Springer.","DOI":"10.1007\/978-3-319-72434-8_3"},{"key":"ref_9","unstructured":"European Commission (2020, February 09). Shaping the Digital Single Market. Available online: https:\/\/ec.europa.eu\/digital-single-market\/en\/policies\/shaping-digital-single-market."},{"key":"ref_10","unstructured":"European Commission (2020, February 10). Building a European Data Economy. Available online: https:\/\/ec.europa.eu\/digital-single-market\/news-redirect\/624105."},{"key":"ref_11","unstructured":"European Commission (2020, February 09). Tallinn Declaration on eGovernment at the ministerial meeting during Estonian Presidency of the Council of the EU on 6 October 2017. Available online: http:\/\/ec.europa.eu\/newsroom\/document.cfm?doc_id=47559."},{"key":"ref_12","unstructured":"European Commission (2020, February 09). European eGovernment Action Plan 2016\u20132020. Available online: https:\/\/ec.europa.eu\/digital-single-market\/en\/european-egovernment-action-plan-2016-2020."},{"key":"ref_13","first-page":"58","article-title":"The economic value of the Dutch geo-information sector","volume":"5","author":"Castelein","year":"2010","journal-title":"Int. J. Spat. Data Infrastruct. Res."},{"key":"ref_14","unstructured":"Oxera (2020, February 28). What is the Economic Impact of Geo Services? Prepared for Google. Available online: https:\/\/www.oxera.com\/publications\/what-is-the-economic-impact-of-geo-services."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Craglia, M., and Pogorzelska, K. (2020). The Economic Value of Digital Earth. Manual of Digital Earth, Springer.","DOI":"10.1007\/978-981-32-9915-3_19"},{"key":"#cr-split#-ref_16.1","unstructured":"European Parliament and European Council (2019). Directive"},{"key":"#cr-split#-ref_16.2","unstructured":"(EU) 2019\/1024 of the European Parliament and of the Council of 20 June 2019 on open data and the re-use of public sector information (recast). Off. J. Eur. Union, L172, 56-83."},{"key":"ref_17","unstructured":"European Parliament and European Council (2003). Directive 2003\/98\/EC of the European Parliament and of the Council of 17 November 2003 on the re-use of public sector information. Off. J. Eur. Union, L345, 90\u201396."},{"key":"ref_18","unstructured":"European Commission (2020, February 09). Communication from the Commission to the European Parliament, the Council, the European Economic and Social Committee and the Committee of the Regions \u201cTowards a common European data space\u201d. Available online: https:\/\/eur-lex.europa.eu\/legal-content\/EN\/TXT\/PDF\/?uri=CELEX:52018DC0232&from=EN."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1038\/sdata.2016.18","article-title":"The FAIR Guiding Principles for scientific data management and stewardship","volume":"3","author":"Wilkinson","year":"2016","journal-title":"Scientific Data"},{"key":"ref_20","unstructured":"European Commission (2020, February 10). Horizon 2020 Commission expert group on Turning FAIR data into reality (E03464). Available online: https:\/\/ec.europa.eu\/transparency\/regexpert\/index.cfm?do=groupDetail.groupDetail&groupID=3464."},{"key":"ref_21","unstructured":"European Commission Expert Group on FAIR Data (2020, February 10). Turning FAIR into reality: Final Report and Action Plan from the European Commission Expert Group on FAIR Data. Available online: http:\/\/dx.doi.org\/10.2777\/1524."},{"key":"ref_22","unstructured":"European Commission (2020, February 10). European Open Science Cloud (EOSC). Available online: https:\/\/ec.europa.eu\/research\/openscience\/index.cfm?pg=open-science-cloud."},{"key":"ref_23","unstructured":"European Commission (2020, February 10). Paris Agreement. Available online: https:\/\/ec.europa.eu\/clima\/policies\/international\/negotiations\/paris_en."},{"key":"ref_24","unstructured":"Von der Leyen, U. (2020, February 10). A Union that Strives for more\u2014My Agenda for Europe: Political Guidelines for the Next European Commission 2019\u20132024. Available online: https:\/\/ec.europa.eu\/commission\/sites\/beta-political\/files\/political-guidelines-next-commission_en.pdf."},{"key":"ref_25","unstructured":"European Commission (2020, February 10). Digital Europe Programme: A Proposed \u20ac9.2 Billion of Funding for 2021\u20132027. Available online: https:\/\/ec.europa.eu\/digital-single-market\/en\/news\/digital-europe-programme-proposed-eu92-billion-funding-2021-2027."},{"key":"ref_26","unstructured":"European Commission (2020, February 10). The European Cloud Initiativel 2019. Available online: https:\/\/ec.europa.eu\/digital-single-market\/en\/%20european-cloud-initiative."},{"key":"ref_27","unstructured":"European Commission (2020, February 10). Future of the Common Agricultural Policy. Available online: https:\/\/ec.europa.eu\/info\/food-farming-fisheries\/key-policies\/common-agricultural-policy\/future-cap_en."},{"key":"ref_28","unstructured":"European Commission (2020, February 10). Europe\u2019s Eyes on Earth: Looking at Our Planet and Its Environment for the Ultimate Benefit of all European Citizens. Available online: https:\/\/www.copernicus.eu."},{"key":"ref_29","unstructured":"European Commission (2020, February 10). Galileo. Available online: https:\/\/ec.europa.eu\/growth\/sectors\/space\/galileo_en."},{"key":"ref_30","unstructured":"European Commission (2019, December 10). EGNOS. Available online: https:\/\/ec.europa.eu\/growth\/sectors\/space\/egnos_en."},{"key":"#cr-split#-ref_31.1","doi-asserted-by":"crossref","unstructured":"European Parliament and European Council (2016). Regulation","DOI":"10.59403\/1v8s9t8"},{"key":"#cr-split#-ref_31.2","unstructured":"(EU) 2016\/679 of the European Parliament and of the Council of 27 April 2016 on the Protection of Natural Persons with Regard to the Processing of Personal Data and on the Free Movement of Such Data, and Repealing Directive 95\/46\/EC (General Data Protection Regulation), Office of the European Union."},{"key":"ref_32","unstructured":"European Commission (2020, February 10). INSPIRE Geoportal. Available online: https:\/\/inspire-geoportal.ec.europa.eu."},{"key":"ref_33","doi-asserted-by":"crossref","unstructured":"Minghini, M., Cetl, V., Kotsev, A., Tomas, R., and Lutz, M. (2020). INSPIRE: The entry point to Europe\u2019s Big Geospatial Data Infrastructure. Handbook of Big Geospatial Data, Springer. in pressing.","DOI":"10.1007\/978-3-030-55462-0_24"},{"key":"ref_34","unstructured":"European Commission (2020, February 07). MIWP Action 2016.5 Priority List of Datasets for e-Reporting. Available online: https:\/\/ies-svn.jrc.ec.europa.eu\/projects\/2016-5\/wiki."},{"key":"ref_35","unstructured":"European Commission (2020, February 07). INSPIRE Data Themes. Available online: https:\/\/inspire.ec.europa.eu\/Themes\/Data-Specifications\/2892."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"211","DOI":"10.1007\/s10708-007-9111-y","article-title":"Citizens as sensors: the world of volunteered geography","volume":"69","author":"Goodchild","year":"2007","journal-title":"Geoj."},{"key":"ref_37","unstructured":"(2019, December 10). Wikimapia. Available online: https:\/\/wikimapia.org."},{"key":"ref_38","unstructured":"(2020, February 09). OpenStreetMap. Available online: https:\/\/www.openstreetmap.org."},{"key":"ref_39","unstructured":"Turner, A. (2006). Introduction to Neogeography, O\u2019Reilly Media."},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"De Mauro, A., Greco, M., and Grimaldi, M. (2014, January 5\u20138). What is big data? A consensual definition and a review of key research topics. Proceedings of the International Conference on Integrated Information (IC-ININFO 2014), Madrid, Spain.","DOI":"10.1063\/1.4907823"},{"key":"ref_41","first-page":"e17011","article-title":"The future of data in EFSA","volume":"17","author":"Gilsenan","year":"2019","journal-title":"EFSA J."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"682","DOI":"10.1068\/b35097","article-title":"How good is volunteered geographical information? A comparative study of OpenStreetMap and Ordnance Survey datasets","volume":"37","author":"Haklay","year":"2010","journal-title":"Environ. Plan. Plan. Des."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"435","DOI":"10.1111\/j.1467-9671.2010.01203.x","article-title":"Quality assessment of the French OpenStreetMap dataset","volume":"14","author":"Girres","year":"2010","journal-title":"Trans. Gis"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"700","DOI":"10.1080\/13658816.2013.867495","article-title":"Quality assessment for building footprints data on OpenStreetMap","volume":"28","author":"Fan","year":"2014","journal-title":"Int. J. Geogr. Inf. Sci."},{"key":"ref_45","unstructured":"Facebook (2020, February 09). Mapping Roads through Deep Learning and Weakly Supervised Training. Available online: https:\/\/ai.facebook.com\/blog\/mapping-roads-through-deep-learning-and-weakly-supervised-training."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"217","DOI":"10.3390\/jsan1030217","article-title":"Sensor mania! the internet of things, wearable computing, objective metrics, and the quantified self 2.0","volume":"1","author":"Swan","year":"2012","journal-title":"J. Sens. Actuator Networks"},{"key":"ref_47","doi-asserted-by":"crossref","unstructured":"Kamilaris, A., and Ostermann, F. (2018). Geospatial Analysis and Internet of Things in Environmental Informatics. arXiv.","DOI":"10.3390\/ijgi7070269"},{"key":"ref_48","unstructured":"Mcdougall, K., and Koswatte, S. (2018, January 3\u20136). The future of authoritative geospatial data in the big data world\u2014Trends, opportunities and challenges. Proceedings of the FIG Commission: Spatial Information in an Era of Data Science: Challenges and Practical Solutions, Naples, Italy."},{"key":"ref_49","unstructured":"Huadong, G., Goodchild, M.F., and Annoni, A. (2020). Internet of Things in Geospatial Analytics. Manual of Digital Earth, Springer."},{"key":"ref_50","doi-asserted-by":"crossref","unstructured":"See, L., Mooney, P., Foody, G., Bastin, L., Comber, A., Estima, J., Fritz, S., Kerle, N., Jiang, B., and Laakso, M. (2016). Crowdsourcing, citizen science or volunteered geographic information? The current state of crowdsourced geographic information. ISPRS Int. J. -Geo-Inf., 5.","DOI":"10.3390\/ijgi5050055"},{"key":"ref_51","doi-asserted-by":"crossref","unstructured":"Foody, G., Fritz, S., Mooney, P., Olteanu-Raimond, A.M., Fonte, C.C., and Antoniou, V. (2017). A Review of OpenStreetMap Data. Mapping and the Citizen Sensor, Ubiquity Press.","DOI":"10.5334\/bbf.c"},{"key":"ref_52","unstructured":"(2020, February 09). OpenStreetMap Wiki\u2014Elements. Available online: https:\/\/wiki.openstreetmap.org\/wiki\/Elements."},{"key":"ref_53","unstructured":"(2020, February 09). OpenStreetMap Wiki\u2014Tags. Available online: https:\/\/wiki.openstreetmap.org\/wiki\/Tags."},{"key":"ref_54","unstructured":"(2020, February 09). OpenStreetMap Wiki\u2014Import\/Catalogue. Available online: https:\/\/wiki.openstreetmap.org\/wiki\/Import\/Catalogue."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"167","DOI":"10.5194\/isprs-archives-XLII-4-W14-167-2019","article-title":"Comparing INSPIRE and OpenStreetMap data: How to make the most out of the two worlds","volume":"XLII-4\/W14","author":"Minghini","year":"2019","journal-title":"Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"139","DOI":"10.1080\/13658816.2016.1189556","article-title":"A review of volunteered geographic information quality assessment methods","volume":"31","author":"Senaratne","year":"2017","journal-title":"Int. J. Geogr. Inf. Sci."},{"key":"ref_57","doi-asserted-by":"crossref","unstructured":"Irwin, A. (2002). Citizen Science: A Study of People, Expertise and Sustainable Development, Routledge.","DOI":"10.4324\/9780203202395"},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"101384","DOI":"10.1016\/j.compenvurbsys.2019.101384","article-title":"Aliens in Europe. An open approach to involve more people in invasive species detection","volume":"78","author":"Schade","year":"2019","journal-title":"Comput. Environ. Urban Syst."},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"343","DOI":"10.1109\/JPROC.2018.2806218","article-title":"Modern small satellites-changing the economics of space","volume":"106","author":"Sweeting","year":"2018","journal-title":"Proc. IEEE"},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"25","DOI":"10.5194\/isprsarchives-XXXVIII-1-C22-25-2011","article-title":"UAV photogrammetry for mapping and 3D modeling \u2013 Current status and future perspectives","volume":"XXXVIII-1\/C22","author":"Remondino","year":"2011","journal-title":"Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci."},{"key":"ref_61","unstructured":"European Commission (2020, February 09). Legal notice on the use of Copernicus Sentinel Data and Service Information. Available online: https:\/\/sentinel.esa.int\/documents\/247904\/690755\/Sentinel_Data_Legal_Notice."},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"72","DOI":"10.1109\/MGRS.2016.2635018","article-title":"Geoscience and the Technological Revolution [Perspectives]","volume":"5","author":"Bai","year":"2017","journal-title":"IEEE Geosci. Remote Sens. Mag."},{"key":"ref_63","unstructured":"Ricciato, F., Widhalm, P., Craglia, M., and Pantisano, F. (2015). Estimating Population Density Distribution from Network-Based Mobile Phone Data, Joint Research Centre. [1st ed.]."},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"3","DOI":"10.1111\/tgis.12305","article-title":"A geoprivacy manifesto","volume":"22","author":"McKenzie","year":"2018","journal-title":"Trans. Gis"},{"key":"ref_65","unstructured":"Multidisciplinary Digital Publishing Institute) (2020, February 10). Data\u2014Open Access Journal. Available online: https:\/\/www.mdpi.com\/journal\/data."},{"key":"ref_66","unstructured":"Elsevier (2020, February 10). Data in Brief. Available online: https:\/\/www.journals.elsevier.com\/data-in-brief."},{"key":"ref_67","unstructured":"SpringerOpen (2020, February 10). Open Geospatial Data, Software and Standards. Available online: https:\/\/opengeospatialdata.springeropen.com\/."},{"key":"ref_68","unstructured":"N\u00fcst, D., Ostermann, F., Sileryte, R., Hofer, B., Granell, C., Teperek, M., Graser, A., Broman, K., and Hettne, K. (2019, December 12). Reproducible Publications at AGILE Conferences. Available online: https:\/\/osf.io\/phmce\/."},{"key":"ref_69","unstructured":"Open Geospatial Consortium (2020, February 10). OGC API\u2014Features Standard. Available online: https:\/\/www.opengeospatial.org\/standards\/ogcapi-features."},{"key":"ref_70","unstructured":"Open Geospatial Consortium (2020, February 10). OGC SensorThings API Standard. Available online: https:\/\/www.opengeospatial.org\/standards\/sensorthings."},{"key":"ref_71","unstructured":"(2020, February 09). OpenAPI Specification, Version 3.0.2. Available online: https:\/\/swagger.io\/specification."},{"key":"ref_72","doi-asserted-by":"crossref","unstructured":"Rieke, M., Bigagli, L., Herle, S., Jirka, S., Kotsev, A., Liebig, T., Malewski, C., Paschke, T., and Stasch, C. (2018). Geospatial IoT\u2014The need for event-driven architectures in contemporary spatial data infrastructures. ISPRS Int. J. -Geo-Inf., 7.","DOI":"10.3390\/ijgi7100385"},{"key":"ref_73","unstructured":"International Data Corporation (2020, February 28). Market Analysis Perspective: Worldwide Core and Edge Computing Platforms. Available online: https:\/\/www.idc.com\/getdoc.jsp?containerId=US44305818."},{"key":"ref_74","unstructured":"(2020, February 10). Setting up an INSPIRE Download Service Based on the OGC API-Features Standard. Available online: https:\/\/github.com\/INSPIRE-MIF\/gp-ogc-api-features\/blob\/master\/spec\/oapif-inspire-download.md."},{"key":"ref_75","doi-asserted-by":"crossref","unstructured":"Kotsev, A., Schleidt, K., Liang, S., Van Der Schaaf, H., Khalafbeigi, T., Grellet, S., Lutz, M., Jirka, S., and Beaufils, M. (2018). Extending INSPIRE to the Internet of Things through SensorThings API. Geosci., 8.","DOI":"10.20944\/preprints201805.0031.v1"},{"key":"ref_76","unstructured":"(2020, February 09). Creative Commons Licenses. Available online: https:\/\/creativecommons.org\/use-remix\/cc-licenses\/."},{"key":"ref_77","unstructured":"(2020, February 05). INSPIRE Data Specifications. Available online: https:\/\/inspire.ec.europa.eu\/data-specifications\/2892."},{"key":"ref_78","unstructured":"(2020, February 09). INSPIRE Consolidated UML Model. Available online: https:\/\/inspire.ec.europa.eu\/data-model\/approved\/r4618-ir\/html."},{"key":"ref_79","doi-asserted-by":"crossref","unstructured":"Wieczorek, J., Bloom, D., Guralnick, R., Blum, S., D\u00f6ring, M., Giovanni, R., Robertson, T., and Vieglais, D. (2012). Darwin Core: An evolving community-developed biodiversity data standard. PLoS ONE, 7.","DOI":"10.1371\/journal.pone.0029715"},{"key":"ref_80","unstructured":"Open Geospatial Consortium (2020, February 09). Geography Markup Language (GML). Available online: https:\/\/www.opengeospatial.org\/standards\/gml."},{"key":"ref_81","unstructured":"Butler, H., Daly, M., Doyle, A., Gillies, S., Hagen, S., and Schaub, T. (2020, January 02). The Geojson Format. Available online: http:\/\/www.hjp.at\/doc\/rfc\/rfc7946.html."},{"key":"ref_82","unstructured":"World Wide Web Consortium (W3C) (2020, February 09). Data Catalog Vocabulary (DCAT)\u2014Version 2. Available online: https:\/\/www.w3.org\/TR\/vocab-dcat-2\/#Property:dataset_distribution."}],"container-title":["ISPRS International Journal of Geo-Information"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2220-9964\/9\/3\/176\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T09:07:22Z","timestamp":1760173642000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2220-9964\/9\/3\/176"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,3,16]]},"references-count":84,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2020,3]]}},"alternative-id":["ijgi9030176"],"URL":"https:\/\/doi.org\/10.3390\/ijgi9030176","relation":{},"ISSN":["2220-9964"],"issn-type":[{"value":"2220-9964","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,3,16]]}}}