{"id":"https://openalex.org/W2026249611","doi":"https://doi.org/10.1109/geoinformatics.2010.5568204","title":"Comparison of forest Leaf Area Index retrieval based on simple ratio and reduced simple ratio","display_name":"Comparison of forest Leaf Area Index retrieval based on simple ratio and reduced simple ratio","publication_year":2010,"publication_date":"2010-06-01","ids":{"openalex":"https://openalex.org/W2026249611","doi":"https://doi.org/10.1109/geoinformatics.2010.5568204","mag":"2026249611"},"language":"en","primary_location":{"id":"doi:10.1109/geoinformatics.2010.5568204","is_oa":false,"landing_page_url":"https://doi.org/10.1109/geoinformatics.2010.5568204","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2010 18th International Conference on Geoinformatics","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/A5102098854","display_name":"Gaolong Zhu","orcid":null},"institutions":[{"id":"https://openalex.org/I881766915","display_name":"Nanjing University","ror":"https://ror.org/01rxvg760","country_code":"CN","type":"education","lineage":["https://openalex.org/I881766915"]},{"id":"https://openalex.org/I354108","display_name":"Minjiang University","ror":"https://ror.org/00s7tkw17","country_code":"CN","type":"education","lineage":["https://openalex.org/I354108"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Gaolong Zhu","raw_affiliation_strings":["Department of Geography, Minjiang University, Fuzhou, China","International Institute of Earth System Science, Nanjing University, Nanjing, China"],"affiliations":[{"raw_affiliation_string":"Department of Geography, Minjiang University, Fuzhou, China","institution_ids":["https://openalex.org/I354108"]},{"raw_affiliation_string":"International Institute of Earth System Science, Nanjing University, Nanjing, China","institution_ids":["https://openalex.org/I881766915"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5010493327","display_name":"Weimin Ju","orcid":"https://orcid.org/0000-0002-0010-7401"},"institutions":[{"id":"https://openalex.org/I881766915","display_name":"Nanjing University","ror":"https://ror.org/01rxvg760","country_code":"CN","type":"education","lineage":["https://openalex.org/I881766915"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Weimin Ju","raw_affiliation_strings":["International Institute of Earth System Science, Nanjing University, Nanjing, China"],"affiliations":[{"raw_affiliation_string":"International Institute of Earth System Science, Nanjing University, Nanjing, China","institution_ids":["https://openalex.org/I881766915"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5101406691","display_name":"Jing M. Chen","orcid":"https://orcid.org/0000-0002-2143-6984"},"institutions":[{"id":"https://openalex.org/I185261750","display_name":"University of Toronto","ror":"https://ror.org/03dbr7087","country_code":"CA","type":"education","lineage":["https://openalex.org/I185261750"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Jing M. Chen","raw_affiliation_strings":["Department of Geography, University of Toronto, ONT, Canada"],"affiliations":[{"raw_affiliation_string":"Department of Geography, University of Toronto, ONT, Canada","institution_ids":["https://openalex.org/I185261750"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5016772666","display_name":"Yanlian Zhou","orcid":"https://orcid.org/0000-0002-9293-0365"},"institutions":[{"id":"https://openalex.org/I881766915","display_name":"Nanjing University","ror":"https://ror.org/01rxvg760","country_code":"CN","type":"education","lineage":["https://openalex.org/I881766915"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yanlian Zhou","raw_affiliation_strings":["School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, China"],"affiliations":[{"raw_affiliation_string":"School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, China","institution_ids":["https://openalex.org/I881766915"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100672487","display_name":"Xianfeng Li","orcid":null},"institutions":[{"id":"https://openalex.org/I881766915","display_name":"Nanjing University","ror":"https://ror.org/01rxvg760","country_code":"CN","type":"education","lineage":["https://openalex.org/I881766915"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Xianfeng Li","raw_affiliation_strings":["International Institute of Earth System Science, Nanjing University, Nanjing, China"],"affiliations":[{"raw_affiliation_string":"International Institute of Earth System Science, Nanjing University, Nanjing, China","institution_ids":["https://openalex.org/I881766915"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100851596","display_name":"Xiaochan Xu","orcid":null},"institutions":[{"id":"https://openalex.org/I881766915","display_name":"Nanjing University","ror":"https://ror.org/01rxvg760","country_code":"CN","type":"education","lineage":["https://openalex.org/I881766915"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Xiaochan Xu","raw_affiliation_strings":["School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, China"],"affiliations":[{"raw_affiliation_string":"School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, China","institution_ids":["https://openalex.org/I881766915"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":6,"corresponding_author_ids":["https://openalex.org/A5102098854"],"corresponding_institution_ids":["https://openalex.org/I354108","https://openalex.org/I881766915"],"apc_list":null,"apc_paid":null,"fwci":0.3125,"has_fulltext":false,"cited_by_count":8,"citation_normalized_percentile":{"value":0.65644471,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":null,"issue":null,"first_page":"1","last_page":"4"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10111","display_name":"Remote Sensing in Agriculture","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/2303","display_name":"Ecology"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10111","display_name":"Remote Sensing in Agriculture","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/2303","display_name":"Ecology"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T14365","display_name":"Leaf Properties and Growth Measurement","score":0.9916999936103821,"subfield":{"id":"https://openalex.org/subfields/1110","display_name":"Plant Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10226","display_name":"Land Use and Ecosystem Services","score":0.9901000261306763,"subfield":{"id":"https://openalex.org/subfields/2306","display_name":"Global and Planetary Change"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/leaf-area-index","display_name":"Leaf area index","score":0.9064251780509949},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.6389940977096558},{"id":"https://openalex.org/keywords/vegetation","display_name":"Vegetation (pathology)","score":0.5981953144073486},{"id":"https://openalex.org/keywords/environmental-science","display_name":"Environmental science","score":0.5274301171302795},{"id":"https://openalex.org/keywords/shortwave","display_name":"Shortwave","score":0.49345341324806213},{"id":"https://openalex.org/keywords/canopy","display_name":"Canopy","score":0.44042885303497314},{"id":"https://openalex.org/keywords/atmospheric-sciences","display_name":"Atmospheric sciences","score":0.39155113697052},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.32989752292633057},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.16864013671875},{"id":"https://openalex.org/keywords/ecology","display_name":"Ecology","score":0.1574815809726715},{"id":"https://openalex.org/keywords/radiative-transfer","display_name":"Radiative transfer","score":0.13300368189811707},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.12366759777069092},{"id":"https://openalex.org/keywords/biology","display_name":"Biology","score":0.08976608514785767}],"concepts":[{"id":"https://openalex.org/C25989453","wikidata":"https://www.wikidata.org/wiki/Q446746","display_name":"Leaf area index","level":2,"score":0.9064251780509949},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.6389940977096558},{"id":"https://openalex.org/C2776133958","wikidata":"https://www.wikidata.org/wiki/Q7918366","display_name":"Vegetation (pathology)","level":2,"score":0.5981953144073486},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.5274301171302795},{"id":"https://openalex.org/C2776272892","wikidata":"https://www.wikidata.org/wiki/Q7502249","display_name":"Shortwave","level":3,"score":0.49345341324806213},{"id":"https://openalex.org/C101000010","wikidata":"https://www.wikidata.org/wiki/Q5033434","display_name":"Canopy","level":2,"score":0.44042885303497314},{"id":"https://openalex.org/C91586092","wikidata":"https://www.wikidata.org/wiki/Q757520","display_name":"Atmospheric sciences","level":1,"score":0.39155113697052},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.32989752292633057},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.16864013671875},{"id":"https://openalex.org/C18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","level":1,"score":0.1574815809726715},{"id":"https://openalex.org/C74902906","wikidata":"https://www.wikidata.org/wiki/Q1190858","display_name":"Radiative transfer","level":2,"score":0.13300368189811707},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.12366759777069092},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.08976608514785767},{"id":"https://openalex.org/C142724271","wikidata":"https://www.wikidata.org/wiki/Q7208","display_name":"Pathology","level":1,"score":0.0},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.0},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/geoinformatics.2010.5568204","is_oa":false,"landing_page_url":"https://doi.org/10.1109/geoinformatics.2010.5568204","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2010 18th International Conference on Geoinformatics","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Climate action","score":0.7099999785423279,"id":"https://metadata.un.org/sdg/13"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":17,"referenced_works":["https://openalex.org/W1485678107","https://openalex.org/W1964217023","https://openalex.org/W1973410094","https://openalex.org/W1998776407","https://openalex.org/W1999091234","https://openalex.org/W2033651114","https://openalex.org/W2043142216","https://openalex.org/W2052700773","https://openalex.org/W2068286238","https://openalex.org/W2083053342","https://openalex.org/W2089441588","https://openalex.org/W2151647593","https://openalex.org/W2155722785","https://openalex.org/W2156731172","https://openalex.org/W2171979590","https://openalex.org/W2989983865","https://openalex.org/W6636950212"],"related_works":["https://openalex.org/W2349538307","https://openalex.org/W2382483190","https://openalex.org/W2377212262","https://openalex.org/W4327748155","https://openalex.org/W2955967599","https://openalex.org/W2549050738","https://openalex.org/W4387208895","https://openalex.org/W1594879216","https://openalex.org/W2388815296","https://openalex.org/W1997506171"],"abstract_inverted_index":{"Leaf":[0],"Area":[1],"Index":[2],"(LAI)":[3],"is":[4,253],"an":[5],"essential":[6],"parameter":[7],"for":[8,25,46,208],"process-based":[9],"ecological":[10],"and":[11,41,65,178,261],"climate":[12],"models.":[13],"Spectral":[14],"vegetation":[15,35],"indices":[16],"calculated":[17,67],"from":[18,68,173],"remote":[19],"sensing":[20],"data":[21,71],"are":[22],"widely":[23],"used":[24],"LAI":[26,48,78,106,115,140,171,192,213,229],"retrieval":[27],"at":[28,49,80],"large":[29],"scales.":[30],"The":[31,93,189],"applicability":[32],"of":[33,55,63,103,105,114,133,149,155,162,165,191,248,259,263],"two":[34],"indices,":[36],"namely":[37],"Simple":[38,43],"Ratio":[39],"(SR)":[40],"Reduced":[42],"Ration":[44],"(RSR),":[45],"retrieving":[47,138],"Maoershan":[50],"mountain":[51],"in":[52,137,141],"Heilongjiang":[53],"province":[54],"China":[56],"was":[57,180,198,219,234],"investigated":[58],"through":[59,159],"analyzing":[60],"the":[61,99,112,118,124,130,142,147,153,160,163,195,205,209,216,225,232,246,257],"correlations":[62],"SR":[64,97,136,177,244],"RSR":[66,122,134,150,179,240,252],"Landsat-5":[69],"TM":[70],"acquired":[72],"on":[73,176],"24":[74],"June,":[75],"2009":[76],"with":[77,84,96,121],"measured":[79],"23":[81,109],"typical":[82],"plots":[83,110],"Li-Cor":[85],"LAI-2000":[86],"during":[87],"12":[88],"to":[89,127,146,151,256],"20":[90],"July,":[91],"2009.":[92],"fitted":[94,119],"model":[95,120,197,207,218,227],"as":[98,123],"predator":[100],"captured":[101],"54.7%":[102],"variations":[104,113],"among":[107],"these":[108],"while":[111],"explained":[116],"by":[117,224,231],"predictor":[125],"increased":[126],"75.4%,":[128],"indicating":[129,238],"better":[131],"performance":[132],"over":[135],"forest":[139],"study":[143,211],"area":[144],"owing":[145],"ability":[148],"reduce":[152],"influence":[154,258],"soil":[156],"background":[157],"reflectance":[158,164],"incorporation":[161],"shortwave":[166],"infrared":[167],"wavelength":[168],"into":[169],"SR.":[170,266],"derived":[172],"models":[174],"based":[175],"well":[181],"correlated":[182],"(R":[183],"<sup":[184],"xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"":[185],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">2</sup>":[186],"=0.7219,":[187],"N=180932).":[188],"mean":[190],"estimated":[193,203,214,223,230],"using":[194,204,215],"SR-based":[196],"0.37":[199],"larger":[200,235],"than":[201,221,236,243,265],"that":[202,222,239],"RSR-based":[206],"entire":[210],"area.":[212],"former":[217],"smaller":[220],"latter":[226,233],"when":[228],"5.6,":[237],"saturates":[241],"slower":[242],"under":[245],"condition":[247],"high":[249],"LAI.":[250],"However,":[251],"more":[254],"sensitive":[255],"topography":[260],"shadows":[262],"clouds":[264]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2023,"cited_by_count":2},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":2},{"year":2019,"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"}