{"id":"https://openalex.org/W1993100747","doi":"https://doi.org/10.1145/2638728.2641670","title":"Beyond horizontal location context","display_name":"Beyond horizontal location context","publication_year":2014,"publication_date":"2014-09-13","ids":{"openalex":"https://openalex.org/W1993100747","doi":"https://doi.org/10.1145/2638728.2641670","mag":"1993100747"},"language":"en","primary_location":{"id":"doi:10.1145/2638728.2641670","is_oa":false,"landing_page_url":"https://doi.org/10.1145/2638728.2641670","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 2014 ACM International Joint Conference on Pervasive and Ubiquitous Computing: Adjunct Publication","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5009649482","display_name":"Guangwen Liu","orcid":"https://orcid.org/0000-0002-2521-0894"},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":true,"raw_author_name":"Guangwen Liu","raw_affiliation_strings":["The University of Tokyo, Meguro-ku, Tokyo, Japan","The University of Tokyo, Meguro-Ku, Tokyo, Japan#TAB#"],"affiliations":[{"raw_affiliation_string":"The University of Tokyo, Meguro-ku, Tokyo, Japan","institution_ids":["https://openalex.org/I74801974"]},{"raw_affiliation_string":"The University of Tokyo, Meguro-Ku, Tokyo, Japan#TAB#","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5025094439","display_name":"Masayuki Iwai","orcid":null},"institutions":[{"id":"https://openalex.org/I165522056","display_name":"Tokyo Denki University","ror":"https://ror.org/01pa62v70","country_code":"JP","type":"education","lineage":["https://openalex.org/I165522056"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Masayuki Iwai","raw_affiliation_strings":["Tokyo Denki University","TOKYO DENKI UNIVERSITY"],"affiliations":[{"raw_affiliation_string":"Tokyo Denki University","institution_ids":["https://openalex.org/I165522056"]},{"raw_affiliation_string":"TOKYO DENKI UNIVERSITY","institution_ids":["https://openalex.org/I165522056"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5004589876","display_name":"Yoshito Tobe","orcid":"https://orcid.org/0000-0002-1795-5829"},"institutions":[{"id":"https://openalex.org/I131231118","display_name":"Aoyama Gakuin University","ror":"https://ror.org/002rw7y37","country_code":"JP","type":"education","lineage":["https://openalex.org/I131231118"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Yoshito Tobe","raw_affiliation_strings":["Aoyama Gakuin University"],"affiliations":[{"raw_affiliation_string":"Aoyama Gakuin University","institution_ids":["https://openalex.org/I131231118"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5085537594","display_name":"Dunstan Matekenya","orcid":null},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Dunstan Matekenya","raw_affiliation_strings":["The University of Tokyo"],"affiliations":[{"raw_affiliation_string":"The University of Tokyo","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5078837722","display_name":"Khan Muhammad Asif Hossain","orcid":null},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Khan Muhammad Asif Hossain","raw_affiliation_strings":["The University of Tokyo"],"affiliations":[{"raw_affiliation_string":"The University of Tokyo","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5029829747","display_name":"Masaki Ito","orcid":"https://orcid.org/0000-0002-8032-7198"},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Masaki Ito","raw_affiliation_strings":["The University of Tokyo"],"affiliations":[{"raw_affiliation_string":"The University of Tokyo","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5050720322","display_name":"Kaoru Sezaki","orcid":"https://orcid.org/0000-0003-1194-4632"},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Kaoru Sezaki","raw_affiliation_strings":["The University of Tokyo"],"affiliations":[{"raw_affiliation_string":"The University of Tokyo","institution_ids":["https://openalex.org/I74801974"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":7,"corresponding_author_ids":["https://openalex.org/A5009649482"],"corresponding_institution_ids":["https://openalex.org/I74801974"],"apc_list":null,"apc_paid":null,"fwci":3.5587,"has_fulltext":false,"cited_by_count":52,"citation_normalized_percentile":{"value":0.9336255,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":99},"biblio":{"volume":null,"issue":null,"first_page":"459","last_page":"468"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10326","display_name":"Indoor and Outdoor Localization Technologies","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10326","display_name":"Indoor and Outdoor Localization Technologies","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13121","display_name":"Radio Wave Propagation Studies","score":0.9936000108718872,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11234","display_name":"Precipitation Measurement and Analysis","score":0.9412999749183655,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/elevation","display_name":"Elevation (ballistics)","score":0.8848541378974915},{"id":"https://openalex.org/keywords/global-positioning-system","display_name":"Global Positioning System","score":0.7799926996231079},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.664189875125885},{"id":"https://openalex.org/keywords/context","display_name":"Context (archaeology)","score":0.5770297050476074},{"id":"https://openalex.org/keywords/digital-elevation-model","display_name":"Digital elevation model","score":0.5642250776290894},{"id":"https://openalex.org/keywords/altitude","display_name":"Altitude (triangle)","score":0.5382241010665894},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.49268776178359985},{"id":"https://openalex.org/keywords/geodesy","display_name":"Geodesy","score":0.3448307514190674},{"id":"https://openalex.org/keywords/environmental-science","display_name":"Environmental science","score":0.33231210708618164},{"id":"https://openalex.org/keywords/real-time-computing","display_name":"Real-time computing","score":0.3211085796356201},{"id":"https://openalex.org/keywords/geography","display_name":"Geography","score":0.30535638332366943},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.16247421503067017},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.10012117028236389},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.0691477358341217}],"concepts":[{"id":"https://openalex.org/C37054046","wikidata":"https://www.wikidata.org/wiki/Q641888","display_name":"Elevation (ballistics)","level":2,"score":0.8848541378974915},{"id":"https://openalex.org/C60229501","wikidata":"https://www.wikidata.org/wiki/Q18822","display_name":"Global Positioning System","level":2,"score":0.7799926996231079},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.664189875125885},{"id":"https://openalex.org/C2779343474","wikidata":"https://www.wikidata.org/wiki/Q3109175","display_name":"Context (archaeology)","level":2,"score":0.5770297050476074},{"id":"https://openalex.org/C181843262","wikidata":"https://www.wikidata.org/wiki/Q640492","display_name":"Digital elevation model","level":2,"score":0.5642250776290894},{"id":"https://openalex.org/C6350597","wikidata":"https://www.wikidata.org/wiki/Q339495","display_name":"Altitude (triangle)","level":2,"score":0.5382241010665894},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.49268776178359985},{"id":"https://openalex.org/C13280743","wikidata":"https://www.wikidata.org/wiki/Q131089","display_name":"Geodesy","level":1,"score":0.3448307514190674},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.33231210708618164},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.3211085796356201},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.30535638332366943},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.16247421503067017},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.10012117028236389},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.0691477358341217},{"id":"https://openalex.org/C166957645","wikidata":"https://www.wikidata.org/wiki/Q23498","display_name":"Archaeology","level":1,"score":0.0},{"id":"https://openalex.org/C66938386","wikidata":"https://www.wikidata.org/wiki/Q633538","display_name":"Structural engineering","level":1,"score":0.0},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1145/2638728.2641670","is_oa":false,"landing_page_url":"https://doi.org/10.1145/2638728.2641670","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 2014 ACM International Joint Conference on Pervasive and Ubiquitous Computing: Adjunct Publication","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Sustainable cities and communities","score":0.4399999976158142,"id":"https://metadata.un.org/sdg/11"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":19,"referenced_works":["https://openalex.org/W1840299368","https://openalex.org/W2000453311","https://openalex.org/W2001723091","https://openalex.org/W2016493615","https://openalex.org/W2030646401","https://openalex.org/W2038166203","https://openalex.org/W2043116611","https://openalex.org/W2045940997","https://openalex.org/W2048312361","https://openalex.org/W2080721642","https://openalex.org/W2100045669","https://openalex.org/W2105773494","https://openalex.org/W2132639726","https://openalex.org/W2141755357","https://openalex.org/W2145938889","https://openalex.org/W2811507150","https://openalex.org/W4285719527","https://openalex.org/W6679534625","https://openalex.org/W6752867117"],"related_works":["https://openalex.org/W3148155918","https://openalex.org/W2376261394","https://openalex.org/W2462682329","https://openalex.org/W2362267503","https://openalex.org/W2164484807","https://openalex.org/W2371866917","https://openalex.org/W4206741056","https://openalex.org/W2393619620","https://openalex.org/W3040595263","https://openalex.org/W2356895184"],"abstract_inverted_index":{"Accurate":[0],"estimation":[1],"of":[2,91,102],"elevation":[3,39,59,80],"is":[4,13,22,30,106],"important":[5],"for":[6,108],"many":[7],"location":[8],"based":[9],"services.":[10],"Although,":[11],"it":[12],"possible":[14,31],"to":[15,32,37,54],"obtain":[16],"altitude":[17],"from":[18],"GPS,":[19],"its":[20],"accuracy":[21],"unreliable":[23],"and":[24,43,57,68,94],"applicable":[25],"in":[26,40,65,88,99],"outdoors":[27],"only.":[28],"It":[29],"use":[33],"barometers":[34],"on":[35],"smartphones":[36],"estimate":[38],"both":[41,66],"indoor":[42,67],"outdoor":[44,69],"scenarios.":[45],"To":[46],"this":[47],"end,":[48],"we":[49],"proposed":[50],"an":[51,82],"integrated":[52],"framework":[53],"provide":[55,79],"ubiquitous":[56],"accurate":[58],"measurement":[60],"using":[61],"smartphones.":[62],"Experiments":[63],"conducted":[64],"with":[70,81],"different":[71],"geographical":[72],"characteristics":[73],"reveal":[74],"that":[75],"our":[76],"system":[77],"can":[78],"error":[83],"less":[84,95],"than":[85,96],"5":[86],"meters":[87,98],"90":[89],"%":[90,101],"the":[92,103],"cases":[93],"3":[97],"75":[100],"cases,":[104],"which":[105],"sufficient":[107],"most":[109],"practical":[110],"applications.":[111]},"counts_by_year":[{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":2},{"year":2023,"cited_by_count":6},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":5},{"year":2020,"cited_by_count":6},{"year":2019,"cited_by_count":5},{"year":2018,"cited_by_count":5},{"year":2017,"cited_by_count":5},{"year":2016,"cited_by_count":7},{"year":2015,"cited_by_count":4},{"year":2014,"cited_by_count":1},{"year":2013,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}