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Information about frew

Published on September 3, 2007

Author: Woodwork


Textual-Geospatial Integration Project:  Textual-Geospatial Integration Project JAMES FREW University of California, Santa Barbara Geospatially-Augmented Search:  Geospatially-Augmented Search What’s here? Find library objects associated with a given location: Place name(s) 'Footprint' (geographic extent) Where’s this? Find the location(s) associated with a given library object Examples (from TREC-9):  Examples (from TREC-9) Find documents that contain residential real estate listings within New Jersey. Find reports on automobile traffic in the Washington, DC metropolitan area. What forms of entertainment are available in Newport Beach, California? Why Is GAS® Difficult?:  Why Is GAS® Difficult? Few library objects have explicit locations Assigned reliably Identified in object’s metadata Many objects (especially text documents) have implicit locations Present in, or inferable from, object’s content Not necessarily identified as locations “Where’s This” Service:  'Where’s This' Service PARSE LOOKUP ANALYZE EVALUATE text document type thesaurus gazetteer potential names, types, coordinates gazetteer entries (known places) ranked footprints and placenames 'best' name(s) composite footprint Geo-parsing:  Geo-parsing Extract 'geographic facts' from text Characterize by Potential place component name, type, footprint Related fact (with preposition) 'in …', 'northeast of …', etc. Frequency Importance Context Geo-parsing Example (1/2):  Geo-parsing Example (1/2) (California,,,,1,K) (Callahan,,,(in,California),1,K) (Callahan-Yreka,,,(area of,),1,T) (Early Cambrian,,,,1,B) (Klamath Mountains,,,(eastern,),1,T) (Klamath Mountains,,,(within,),1,B) (Klamath Mountains,,,,1,K) (Northern California,,,,1,T) (Ordovician,,,,1,B) (Ordovician,,,,1,K) (Paleozoic,,,(in,California),1,B) (Paleozoic,,,,1,K) Geo-parsing Example (2/2):  Geo-parsing Example (2/2) (Silurian,,,,1,K) (Siskiyou County,,,(in,California),1,K) (Skookum Gulch,,,,1,K) (Skookum Gulch,,,,1,T) (Skookum Gulch,,,,2,B) (United States,,,,1,K) (Yreka,,,(in,California),1,K) (,fault,,,2,B) (,rocks,,,6,B) (,,N410000N420000W1220000W1230000,,1,C) (,,,(in,North America),1,B) Lookup Example: Feature Type:  Lookup Example: Feature Type Fault: partial match: fault zones Rocks: use: natural rock formations Lookup Example: Gazetteer:  Lookup Example: Gazetteer Place Name exact partial Skookum Gulch 1 0 Klamath Mountains 1 0 Northern California 1 0 California 1 492 Callahan* 1 1 Silurian 0 5 Siskiyou County* 1 14 United States 1 273 Yreka* 1 12 North America 0 8 *within footprint of California Analysis Criteria:  Analysis Criteria Placement in document e.g. keywords, title andgt; body Frequency in document Exact match in gazetteer Accuracy of gazetteer footprint e.g. points andlt; bounding boxes Scale of gazetteer footprint Size of focus area / size of footprint Analysis Example: Results:  Analysis Example: Results High confidence Callahan in California Yreka in California Skookum Gulch Klamath Mountains (eastern) Siskiyou County Low confidence Northern California United States North America Evaluation Example:  Evaluation Example Skookum Gluch Klamath Mountains California Callahan in California Siskiyou County in California United States Yreka in California Additional placenames Shasta Butte City Yreka City Thompson's Dry Diggings “What’s Here” Service:  'What’s Here' Service Gazetteer Query Expansion Example Query: Bodies of Water near Chicago Expansion Terms: Lake Michigan, Chicago River Manual Relevance Feedback:  Manual Relevance Feedback Gazetteer AIRE Query Parser User Interface Place Names 'Chicago' Spatial Synonyms 'Chicago, IL' 'Chicago River' Query Automatic Relevance Feedback:  Automatic Relevance Feedback Gazetteer AIRE Document Ranker RF System Place Names, Surrounding Type Terms 'Bodies of Water' Spatial Query Results 'Chicago River, Lake Michigan' Expanded Query “What’s Here” Components:  'What’s Here' Components Place names  footprints Requires: place name ranking scheme Chicago, IL andgt; Chicago tectonic plate in Brazil Type terms  classes Requires: class thesaurus API 'Bodies of Water'  'Water Bodies' 3. Gazetteer  spatial synonyms Requires: gazetteer API; results ranking 'Bodies of Water near Chicago'  set of gazetteer queries The Light at the End of the Tunnel:  The Light at the End of the Tunnel You submit: a document You get: a place Best Also-rans Alternatives What you do with this is your business Brought To You By:  Brought To You By UCSB Linda Hill Greg Janée Dave Valentine Satoshi Ikeda (Japan Patent Office) IIT Steven Beitzel Ophir Frieder David Grossman Eric Jensen Vasif Shaikh Slide20: 

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