View
41
Download
0
Category
Preview:
Citation preview
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
Tardyetal.,UniversityofGeneva 16
Recommended