Centre Universitaire d’Informatique Institute of Information Service Science

ASimpleTagsCategoriza2onFrameworkUsingSpa2alCoveragetoDiscoverGeospa2alSeman2cs

Tardy,C.,Moccozet,M.,Falquet,G.WorkshopOD4LS-WWW2016Companion

April2016Montréal,Canada

Fillingthegaps

Tardyetal.,UniversityofGeneva 2

Fillingthegaps

•  Mapsmissinggeographicfeaturescharacteris@cs

•  VGIsourceswithtags•  geographicandspa@alaxis

•  Nonsta@s@calapproach•  Mustworkonplaceswithsmallamountofdata

Tardyetal.,UniversityofGeneva 3

Model

•  Usingtaggedphotosassource

•  Mul@-facetsmodel•  Algorithmbyelimina@on

•  Basedonspa@alcoverage

Tardyetal.,UniversityofGeneva 4

Spa@alCoverage

•  Acombina@onofseman2candgeographicno@onsthatdescribespreciselythespa2o-temporalregionshowninthepicture.

•  dis@nc@onbetween–  thegeographicandspa@alcontentofaresource– anditsactualspa@alcoverage.

Tardyetal.,UniversityofGeneva 5

Categories

GeographicFeatures

GeographicClass

Event

Temporal

Weather

Actor

Meta

Color

Tardyetal.,UniversityofGeneva 6

AlgorithmGeo

iden@fica@on

Tagincoverage

Yes No

Tagincategory

No

Yes

Select

No

Select

Yes

Tardyetal.,UniversityofGeneva 7

GeoIden@fica@onLocalArea&

Hierarchymapping

Un@lmatchQueryGeoNamesforeachhierarchy

Neighbourhood

County

Region

Country

World

Ifmatch:

•  Savegeonamesen@tyindatabase

•  Associatewithtag

•  Savehierarchylevel

Tardyetal.,UniversityofGeneva 8

GeoIden@fica@on&coverageExample

https://flic.kr/p/m9ZBPB

Incoverage:àThéâtrePitoëff

Tardyetal.,UniversityofGeneva 9

NonGeoTagIden@fica@on

1. Taglanguagedetec@onusingWik@onary/WordNet

2. Tagdisambigua@on:

1.  Tagsofsamephotoasset

2.  BabelfyandBabelNetiden@fica@ongroupedbylanguage

3.  Ifneededdisambigua@onGeo–nonGeocomparingboth

weights

Tardyetal.,UniversityofGeneva 10

NonGeoTagCategorisa@on

•  UsingBabelNetcategoriesextractedfrom

Wikipedia

•  orbyHand

•  Associateeachtagtoacategory

Event

TemporalWeather

Actor

Meta

Color

Tardyetal.,UniversityofGeneva 11

TagCategorisa@onExample

Actor

Event

Temporal

Color

Meta

Therestofthetagsare:•  Ambiance•  Nightlife•  Music/Musique•  Concert/Gigs•  Shows•  Fes@val

Tardyetal.,UniversityofGeneva 12

Geofeaturetarget

•  Flickrphotoloca@oninfo:<loca2onla2tude="46.193959"longitude="6.143385”accuracy="16"context="0"place_id="EDcBbVFWWrj07WE”woeid="782861">

•  OpenStreetMap

Tardyetal.,UniversityofGeneva 13

Missing/WrongCharacteris@cs

Tardyetal.,UniversityofGeneva 14

Findingcharacteris@cs

Tardyetal.,UniversityofGeneva 15

Therestofthetagsare:•  Ambiance•  Nightlife•  Music/Musique•  Concert/Gigs•  Shows•  Fes@val

Incoverage:àThéâtrePitoëff

Conclusion

•  Worksongeographiczoneswithlowdensityofresources

•  Canbeusedasapre-treatmenttosta@s@calapproach

•  Enhancementofspa@aldescrip@onsingeo-services(Citygml,OpenStreetMap)

•  Precisequeriesinsearchengines

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