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Auteur Ourania Kounadi |
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Adaptive areal elimination (AAE): A transparent way of disclosing protected spatial datasets / Ourania Kounadi in Computers, Environment and Urban Systems, vol 57 (May 2016)
[article]
Titre : Adaptive areal elimination (AAE): A transparent way of disclosing protected spatial datasets Type de document : Article/Communication Auteurs : Ourania Kounadi, Auteur ; Michael Leitner, Auteur Année de publication : 2016 Article en page(s) : pp 59 - 67 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] anonymisation
[Termes IGN] confidentialité
[Termes IGN] données localisées
[Termes IGN] erreur géométrique
[Termes IGN] infraction
[Termes IGN] protection de la vie privéeRésumé : (auteur) Geographical masking is the conventional solution to protect the privacy of individuals involved in confidential spatial point datasets. The masking process displaces confidential locations to protect individual privacy while maintaining a fine level of spatial resolution. The adaptive form of this process aims to further minimize the displacement error by taking into account the underlying population density. We describe an alternative adaptive geomasking method, referred to as Adaptive Areal Elimination (AAE). AAE creates areas of a minimum K-anonymity and then original points are either randomly perturbed within the areas or aggregated to the median centers of the areas. In addition to the masked points, K-anonymized areas can be safely disclosed as well without increasing the risk of re-identification. Using a burglary dataset from Vienna, AAE is compared with an existing adaptive geographical mask, the donut mask. The masking methods are evaluated for preserving a predefined K-anonymity and the spatial characteristics of the original points. The spatial characteristics are assessed with four measures of spatial error: displaced distance, correlation coefficient of density surfaces, hotspots' divergence, and clusters' specificity. Masked points from point aggregation of AAE have the highest spatial error in all the measures but the displaced distance. In contrast, masked points from the donut mask are displaced the least, preserve the original spatial clusters better, have the highest clusters' specificity and correlation coefficient of density surfaces. However, when the donut mask is adapted to achieve an actual K-anonymity, the random perturbation of AAE introduces less spatial error than the donut mask for all the measures of spatial error. Numéro de notice : A2016-394 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.compenvurbsys.2016.01.004 Date de publication en ligne : 04/02/2016 En ligne : http://dx.doi.org/10.1016/j.compenvurbsys.2016.01.004 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81213
in Computers, Environment and Urban Systems > vol 57 (May 2016) . - pp 59 - 67[article]vol 41 n° 3 - June 2014 - Geographic information science: A multi-disciplinary and multi-paradigmatic discipline (Bulletin de Cartography and Geographic Information Science) / Ourania Kounadi
[n° ou bulletin]
est un bulletin de Cartography and Geographic Information Science / Cartography and geographic information society (1999 -)
Titre : vol 41 n° 3 - June 2014 - Geographic information science: A multi-disciplinary and multi-paradigmatic discipline Type de document : Périodique Auteurs : Ourania Kounadi, Auteur ; Mariana Belgiu, Auteur ; Michael Leitner, Auteur Année de publication : 2014 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] analyse spatiale
[Termes IGN] géomatique
[Termes IGN] système d'information géographiqueNuméro de notice : 032-201403 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Numéro de périodique En ligne : http://www.tandfonline.com/toc/tcag20/41/3 Format de la ressource électronique : URL sommaire Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=21856 [n° ou bulletin]Contient
- A new geospatial overlay method for the analysis and visualization of spatial change patterns using object-oriented data modeling concepts / Dirk Tiede in Cartography and Geographic Information Science, vol 41 n° 3 (June 2014)
- Web-based 4D visualization of marine geo-data using WebGL / Bernd Resch in Cartography and Geographic Information Science, vol 41 n° 3 (June 2014)
- The GeoCitizen-approach: community-based spatial planning, an Ecuadorian case study / Karl Atamanstorfer in Cartography and Geographic Information Science, vol 41 n° 3 (June 2014)
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Code-barres Cote Support Localisation Section Disponibilité 032-2014031 RAB Revue Centre de documentation En réserve L003 Disponible Accuracy and privacy aspects in free online reverse geocoding services / Ourania Kounadi in Cartography and Geographic Information Science, vol 40 n° 2 (March 2013)
[article]
Titre : Accuracy and privacy aspects in free online reverse geocoding services Type de document : Article/Communication Auteurs : Ourania Kounadi, Auteur ; Thomas Lampoltshammer, Auteur ; Michael Leitner, Auteur ; Thomas Heistracher, Auteur Année de publication : 2013 Article en page(s) : pp 140 - 153 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] analyse comparative
[Termes IGN] corpus
[Termes IGN] extraction de données
[Termes IGN] géocodage inverse
[Termes IGN] protection de la vie privée
[Termes IGN] Web Map ServiceRésumé : (Auteur) Reverse geocoding is defined as the extraction of textual information, such as a name or an address, from geographic coordinates. This technique is common in many geo-application scenarios, e.g., in freely available online-based mapping services. However, if personal data are mapped, confidentiality issues may arise, such as if the data are derived from a crime-incidents database. This research provides an evaluation of seven freely available Web mapping services in regard to reverse geocoding accuracy and privacy aspects. The services' textual accuracy is measured using crime data from Vienna, Austria. The accuracy associated with reverse geocoding is derived for districts with different residential densities to determine whether any error variation is associated with the underlying residential structure. Furthermore, this research investigates the reidentification risk when compromising personal information. Using a free online telephone database and addresses in a crime-incidents dataset, the probable names that are linked to crime victims are identified. The results showed that the accuracy ranges from 0% to 23% depending on the predefined precision level. Comparing seven online reverse geocoding services (TravelGIS, Google Maps, nominatim, ArcGIS, Yahoo, Bing, and Geonames), TravelGIS performs better at the highest precision level, whereas Geonames performs better at a lower precision level. However, the results showed no difference among the districts with different residential densities. As for the reidentification risk, 68% probable victims were identified from the database. This work discusses the specific tasks that users have to complete when retrieving addresses associated with crime-incident locations. The article concludes with an evaluation of the reverse geocoding process and a discussion of the privacy risk associated with it. Numéro de notice : A2013-748 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/15230406.2013.777138 En ligne : https://doi.org/10.1080/15230406.2013.777138 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32884
in Cartography and Geographic Information Science > vol 40 n° 2 (March 2013) . - pp 140 - 153[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 032-2013021 RAB Revue Centre de documentation En réserve L003 Disponible