{"id":"https://openalex.org/W4317738931","doi":"https://doi.org/10.3390/rs15030639","title":"A Review of Estimation Methods for Aboveground Biomass in Grasslands Using UAV","display_name":"A Review of Estimation Methods for Aboveground Biomass in Grasslands Using UAV","publication_year":2023,"publication_date":"2023-01-21","ids":{"openalex":"https://openalex.org/W4317738931","doi":"https://doi.org/10.3390/rs15030639"},"language":"en","primary_location":{"id":"doi:10.3390/rs15030639","is_oa":true,"landing_page_url":"https://doi.org/10.3390/rs15030639","pdf_url":"https://www.mdpi.com/2072-4292/15/3/639/pdf?version=1675920833","source":{"id":"https://openalex.org/S43295729","display_name":"Remote Sensing","issn_l":"2072-4292","issn":["2072-4292"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Remote Sensing","raw_type":"journal-article"},"type":"review","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://www.mdpi.com/2072-4292/15/3/639/pdf?version=1675920833","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5053080587","display_name":"Clara Oliva Gon\u00e7alves Bazzo","orcid":"https://orcid.org/0000-0001-7393-9877"},"institutions":[{"id":"https://openalex.org/I135140700","display_name":"University of Bonn","ror":"https://ror.org/041nas322","country_code":"DE","type":"education","lineage":["https://openalex.org/I135140700"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"Clara Oliva Gon\u00e7alves Bazzo","raw_affiliation_strings":["Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Katzenburgweg 5, 53115 Bonn, Germany"],"raw_orcid":"https://orcid.org/0000-0001-7393-9877","affiliations":[{"raw_affiliation_string":"Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Katzenburgweg 5, 53115 Bonn, Germany","institution_ids":["https://openalex.org/I135140700"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5065973975","display_name":"Bahareh Kamali","orcid":"https://orcid.org/0000-0002-8070-0175"},"institutions":[{"id":"https://openalex.org/I135140700","display_name":"University of Bonn","ror":"https://ror.org/041nas322","country_code":"DE","type":"education","lineage":["https://openalex.org/I135140700"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Bahareh Kamali","raw_affiliation_strings":["Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Katzenburgweg 5, 53115 Bonn, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Katzenburgweg 5, 53115 Bonn, Germany","institution_ids":["https://openalex.org/I135140700"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5016420824","display_name":"Christoph H\u00fctt","orcid":"https://orcid.org/0000-0001-8381-9676"},"institutions":[{"id":"https://openalex.org/I180923762","display_name":"University of Cologne","ror":"https://ror.org/00rcxh774","country_code":"DE","type":"education","lineage":["https://openalex.org/I180923762"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Christoph H\u00fctt","raw_affiliation_strings":["GIS & RS Group, Institute of Geography, University of Cologne, Albertus-Magnus-Platz, 50923 Cologne, Germany"],"raw_orcid":"https://orcid.org/0000-0001-8381-9676","affiliations":[{"raw_affiliation_string":"GIS & RS Group, Institute of Geography, University of Cologne, Albertus-Magnus-Platz, 50923 Cologne, Germany","institution_ids":["https://openalex.org/I180923762"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5019648655","display_name":"Georg Bareth","orcid":"https://orcid.org/0000-0003-3692-8655"},"institutions":[{"id":"https://openalex.org/I180923762","display_name":"University of Cologne","ror":"https://ror.org/00rcxh774","country_code":"DE","type":"education","lineage":["https://openalex.org/I180923762"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Georg Bareth","raw_affiliation_strings":["GIS & RS Group, Institute of Geography, University of Cologne, Albertus-Magnus-Platz, 50923 Cologne, Germany"],"raw_orcid":"https://orcid.org/0000-0003-3692-8655","affiliations":[{"raw_affiliation_string":"GIS & RS Group, Institute of Geography, University of Cologne, Albertus-Magnus-Platz, 50923 Cologne, Germany","institution_ids":["https://openalex.org/I180923762"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5069966398","display_name":"Thomas Gaiser","orcid":"https://orcid.org/0000-0002-5820-2364"},"institutions":[{"id":"https://openalex.org/I135140700","display_name":"University of Bonn","ror":"https://ror.org/041nas322","country_code":"DE","type":"education","lineage":["https://openalex.org/I135140700"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Thomas Gaiser","raw_affiliation_strings":["Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Katzenburgweg 5, 53115 Bonn, Germany"],"raw_orcid":"https://orcid.org/0000-0002-5820-2364","affiliations":[{"raw_affiliation_string":"Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Katzenburgweg 5, 53115 Bonn, Germany","institution_ids":["https://openalex.org/I135140700"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5053080587"],"corresponding_institution_ids":["https://openalex.org/I135140700"],"apc_list":{"value":2500,"currency":"CHF","value_usd":2707},"apc_paid":{"value":2500,"currency":"CHF","value_usd":2707},"fwci":9.4902,"has_fulltext":false,"cited_by_count":84,"citation_normalized_percentile":{"value":0.99014884,"is_in_top_1_percent":true,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":99,"max":100},"biblio":{"volume":"15","issue":"3","first_page":"639","last_page":"639"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11164","display_name":"Remote Sensing and LiDAR Applications","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/2305","display_name":"Environmental Engineering"},"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/T11164","display_name":"Remote Sensing and LiDAR Applications","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/2305","display_name":"Environmental Engineering"},"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/T10111","display_name":"Remote Sensing in Agriculture","score":0.9993000030517578,"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/T10895","display_name":"Species Distribution and Climate Change","score":0.9980999827384949,"subfield":{"id":"https://openalex.org/subfields/2302","display_name":"Ecological Modeling"},"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/environmental-science","display_name":"Environmental science","score":0.6754807829856873},{"id":"https://openalex.org/keywords/biomass","display_name":"Biomass (ecology)","score":0.6558963060379028},{"id":"https://openalex.org/keywords/grassland","display_name":"Grassland","score":0.6295927166938782},{"id":"https://openalex.org/keywords/ecosystem","display_name":"Ecosystem","score":0.5396021008491516},{"id":"https://openalex.org/keywords/normalized-difference-vegetation-index","display_name":"Normalized Difference Vegetation Index","score":0.5180747509002686},{"id":"https://openalex.org/keywords/vegetation","display_name":"Vegetation (pathology)","score":0.5148012042045593},{"id":"https://openalex.org/keywords/terrestrial-ecosystem","display_name":"Terrestrial ecosystem","score":0.41218143701553345},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.4071239233016968},{"id":"https://openalex.org/keywords/environmental-resource-management","display_name":"Environmental resource management","score":0.3247952461242676},{"id":"https://openalex.org/keywords/leaf-area-index","display_name":"Leaf area index","score":0.2907992899417877},{"id":"https://openalex.org/keywords/ecology","display_name":"Ecology","score":0.23826396465301514},{"id":"https://openalex.org/keywords/geography","display_name":"Geography","score":0.1498127281665802}],"concepts":[{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.6754807829856873},{"id":"https://openalex.org/C115540264","wikidata":"https://www.wikidata.org/wiki/Q2945560","display_name":"Biomass (ecology)","level":2,"score":0.6558963060379028},{"id":"https://openalex.org/C2775835988","wikidata":"https://www.wikidata.org/wiki/Q1006733","display_name":"Grassland","level":2,"score":0.6295927166938782},{"id":"https://openalex.org/C110872660","wikidata":"https://www.wikidata.org/wiki/Q37813","display_name":"Ecosystem","level":2,"score":0.5396021008491516},{"id":"https://openalex.org/C1549246","wikidata":"https://www.wikidata.org/wiki/Q718775","display_name":"Normalized Difference Vegetation Index","level":3,"score":0.5180747509002686},{"id":"https://openalex.org/C2776133958","wikidata":"https://www.wikidata.org/wiki/Q7918366","display_name":"Vegetation (pathology)","level":2,"score":0.5148012042045593},{"id":"https://openalex.org/C65680412","wikidata":"https://www.wikidata.org/wiki/Q3718755","display_name":"Terrestrial ecosystem","level":3,"score":0.41218143701553345},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.4071239233016968},{"id":"https://openalex.org/C107826830","wikidata":"https://www.wikidata.org/wiki/Q929380","display_name":"Environmental resource management","level":1,"score":0.3247952461242676},{"id":"https://openalex.org/C25989453","wikidata":"https://www.wikidata.org/wiki/Q446746","display_name":"Leaf area index","level":2,"score":0.2907992899417877},{"id":"https://openalex.org/C18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","level":1,"score":0.23826396465301514},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.1498127281665802},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0},{"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}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.3390/rs15030639","is_oa":true,"landing_page_url":"https://doi.org/10.3390/rs15030639","pdf_url":"https://www.mdpi.com/2072-4292/15/3/639/pdf?version=1675920833","source":{"id":"https://openalex.org/S43295729","display_name":"Remote Sensing","issn_l":"2072-4292","issn":["2072-4292"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Remote Sensing","raw_type":"journal-article"},{"id":"pmh:oai:doaj.org/article:df15f551c95b48f1ae03585d875b45ac","is_oa":true,"landing_page_url":"https://doaj.org/article/df15f551c95b48f1ae03585d875b45ac","pdf_url":null,"source":{"id":"https://openalex.org/S4306401280","display_name":"DOAJ (DOAJ: Directory of Open Access Journals)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-sa","license_id":"https://openalex.org/licenses/cc-by-sa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Remote Sensing, Vol 15, Iss 3, p 639 (2023)","raw_type":"article"},{"id":"pmh:oai:mdpi.com:/2072-4292/15/3/639/","is_oa":true,"landing_page_url":"https://dx.doi.org/10.3390/rs15030639","pdf_url":null,"source":{"id":"https://openalex.org/S4306400947","display_name":"MDPI (MDPI AG)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I4210097602","host_organization_name":"Multidisciplinary Digital Publishing Institute (Switzerland)","host_organization_lineage":["https://openalex.org/I4210097602"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Remote Sensing; Volume 15; Issue 3; Pages: 639","raw_type":"Text"}],"best_oa_location":{"id":"doi:10.3390/rs15030639","is_oa":true,"landing_page_url":"https://doi.org/10.3390/rs15030639","pdf_url":"https://www.mdpi.com/2072-4292/15/3/639/pdf?version=1675920833","source":{"id":"https://openalex.org/S43295729","display_name":"Remote Sensing","issn_l":"2072-4292","issn":["2072-4292"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Remote Sensing","raw_type":"journal-article"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/15","score":0.6100000143051147,"display_name":"Life in Land"}],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":false},"content_urls":{"pdf":"https://content.openalex.org/works/W4317738931.pdf"},"referenced_works_count":176,"referenced_works":["https://openalex.org/W130765190","https://openalex.org/W170623115","https://openalex.org/W178532007","https://openalex.org/W189066446","https://openalex.org/W1485678107","https://openalex.org/W1584222935","https://openalex.org/W1965042690","https://openalex.org/W1967395374","https://openalex.org/W1968314959","https://openalex.org/W1973037022","https://openalex.org/W1974820932","https://openalex.org/W1981527205","https://openalex.org/W1985410097","https://openalex.org/W1985555755","https://openalex.org/W1991739869","https://openalex.org/W1991929991","https://openalex.org/W1998943389","https://openalex.org/W2000102737","https://openalex.org/W2000613913","https://openalex.org/W2005270253","https://openalex.org/W2005501262","https://openalex.org/W2008283621","https://openalex.org/W2008950984","https://openalex.org/W2011010318","https://openalex.org/W2012686349","https://openalex.org/W2025967407","https://openalex.org/W2029567272","https://openalex.org/W2036003376","https://openalex.org/W2037641269","https://openalex.org/W2041054901","https://openalex.org/W2045102154","https://openalex.org/W2052700773","https://openalex.org/W2053066294","https://openalex.org/W2056352756","https://openalex.org/W2063623478","https://openalex.org/W2064636932","https://openalex.org/W2064690970","https://openalex.org/W2065814573","https://openalex.org/W2075546765","https://openalex.org/W2084229106","https://openalex.org/W2085415038","https://openalex.org/W2086274335","https://openalex.org/W2087047858","https://openalex.org/W2088869795","https://openalex.org/W2089441588","https://openalex.org/W2089668728","https://openalex.org/W2095939249","https://openalex.org/W2097911224","https://openalex.org/W2099400014","https://openalex.org/W2111947859","https://openalex.org/W2113283209","https://openalex.org/W2113410727","https://openalex.org/W2115615525","https://openalex.org/W2120885005","https://openalex.org/W2122841733","https://openalex.org/W2124976023","https://openalex.org/W2128438912","https://openalex.org/W2139303505","https://openalex.org/W2153931341","https://openalex.org/W2159961845","https://openalex.org/W2161815745","https://openalex.org/W2163450852","https://openalex.org/W2166516660","https://openalex.org/W2167594433","https://openalex.org/W2167869331","https://openalex.org/W2184216423","https://openalex.org/W2186782367","https://openalex.org/W2192020007","https://openalex.org/W2207055384","https://openalex.org/W2215132244","https://openalex.org/W2252301886","https://openalex.org/W2267350648","https://openalex.org/W2287746267","https://openalex.org/W2296492884","https://openalex.org/W2333880767","https://openalex.org/W2364516510","https://openalex.org/W2413910992","https://openalex.org/W2468964096","https://openalex.org/W2469630252","https://openalex.org/W2475771298","https://openalex.org/W2513463354","https://openalex.org/W2574761815","https://openalex.org/W2577860486","https://openalex.org/W2582705054","https://openalex.org/W2585124289","https://openalex.org/W2620896114","https://openalex.org/W2751223463","https://openalex.org/W2768558813","https://openalex.org/W2769940363","https://openalex.org/W2790010046","https://openalex.org/W2799707964","https://openalex.org/W2803775013","https://openalex.org/W2804910112","https://openalex.org/W2805696215","https://openalex.org/W2807371277","https://openalex.org/W2837916766","https://openalex.org/W2896093363","https://openalex.org/W2900440931","https://openalex.org/W2911730714","https://openalex.org/W2914169501","https://openalex.org/W2914799819","https://openalex.org/W2918003274","https://openalex.org/W2921186291","https://openalex.org/W2928543680","https://openalex.org/W2964782831","https://openalex.org/W2964851751","https://openalex.org/W2974983923","https://openalex.org/W2976697151","https://openalex.org/W2981500096","https://openalex.org/W2982007079","https://openalex.org/W2988471827","https://openalex.org/W3000457862","https://openalex.org/W3011189840","https://openalex.org/W3013842704","https://openalex.org/W3015569749","https://openalex.org/W3015687351","https://openalex.org/W3016260808","https://openalex.org/W3024529495","https://openalex.org/W3024674663","https://openalex.org/W3027702079","https://openalex.org/W3028933581","https://openalex.org/W3037097725","https://openalex.org/W3037368822","https://openalex.org/W3040847006","https://openalex.org/W3045772967","https://openalex.org/W3081171346","https://openalex.org/W3082083081","https://openalex.org/W3091473049","https://openalex.org/W3092318983","https://openalex.org/W3094051720","https://openalex.org/W3097222248","https://openalex.org/W3097349907","https://openalex.org/W3097374991","https://openalex.org/W3109171706","https://openalex.org/W3109510788","https://openalex.org/W3111958653","https://openalex.org/W3117632797","https://openalex.org/W3122024312","https://openalex.org/W3124597376","https://openalex.org/W3125113274","https://openalex.org/W3131611539","https://openalex.org/W3132066934","https://openalex.org/W3136331220","https://openalex.org/W3153077591","https://openalex.org/W3153588019","https://openalex.org/W3161611941","https://openalex.org/W3165571939","https://openalex.org/W3170113475","https://openalex.org/W3192393044","https://openalex.org/W3194804070","https://openalex.org/W3196677062","https://openalex.org/W3199727327","https://openalex.org/W3205056621","https://openalex.org/W4200088537","https://openalex.org/W4205203619","https://openalex.org/W4206389019","https://openalex.org/W4220750480","https://openalex.org/W4220810137","https://openalex.org/W4224659716","https://openalex.org/W4226049449","https://openalex.org/W4248268077","https://openalex.org/W4281662716","https://openalex.org/W4281714059","https://openalex.org/W4281768836","https://openalex.org/W4283583171","https://openalex.org/W6641485246","https://openalex.org/W6666487912","https://openalex.org/W6677249723","https://openalex.org/W6755258632","https://openalex.org/W6756205384","https://openalex.org/W6761433856","https://openalex.org/W6775604329","https://openalex.org/W6782566722","https://openalex.org/W6784731515","https://openalex.org/W6810745310","https://openalex.org/W6948532288"],"related_works":["https://openalex.org/W3143781064","https://openalex.org/W2362163825","https://openalex.org/W997381520","https://openalex.org/W3192736396","https://openalex.org/W3200068809","https://openalex.org/W2977610787","https://openalex.org/W3199618134","https://openalex.org/W3068212853","https://openalex.org/W1966296647","https://openalex.org/W4319311840"],"abstract_inverted_index":{"Grasslands":[0],"are":[1,181,313],"one":[2,21,220],"of":[3,11,22,143,155,207,215,296,303,329],"the":[4,23,91,141,151,156,188,194,203,216,228,235,311,327,330,354],"world\u2019s":[5],"largest":[6],"ecosystems,":[7],"accounting":[8],"for":[9,35,40,59,173,197,242,338,350],"30%":[10],"total":[12],"terrestrial":[13],"biomass.":[14],"Considering":[15],"that":[16,69,131,257,264,278,310,335],"aboveground":[17],"biomass":[18,121],"(AGB)":[19],"is":[20,38,193],"most":[24,189,195,236,239],"essential":[25],"ecosystem":[26,45],"services":[27],"in":[28,75,90,137,145,148,161,175,200,205,280,306,326,341,353],"grasslands,":[29],"an":[30,135,170],"accurate":[31],"and":[32,43,56,125,166,192,209,253,260,288,305,319,325,346],"faster":[33],"method":[34],"estimating":[36,198],"AGB":[37,74,146,199,339],"critical":[39],"managing,":[41],"protecting,":[42],"promoting":[44],"sustainability.":[46],"Unmanned":[47],"aerial":[48],"vehicles":[49],"(UAVs)":[50],"have":[51],"emerged":[52],"as":[53],"a":[54,84,293,301],"useful":[55],"practical":[57],"tool":[58],"achieving":[60],"this":[61,97,281],"goal.":[62],"Here,":[63],"we":[64,333],"review":[65],"recent":[66],"research":[67,100,139,174,279],"studies":[68,157,299],"employ":[70],"UAVs":[71,144],"to":[72,82,93,225,316],"estimate":[73,226],"grassland":[76,111,179],"ecosystems.":[77],"We":[78,183,275],"summarize":[79],"different":[80],"methods":[81,241,337],"establish":[83],"comprehensive":[85],"workflow,":[86],"from":[87],"data":[88,94,123,210,243,262,268],"collection":[89],"field":[92,119,282],"processing.":[95],"For":[96,290],"purpose,":[98],"64":[99],"articles":[101],"were":[102,158,245],"reviewed,":[103],"focusing":[104],"on":[105],"several":[106],"features":[107],"including":[108],"study":[109],"site,":[110],"species":[112],"composition,":[113],"UAV":[114,336],"platforms,":[115],"flight":[116],"parameters,":[117],"sensors,":[118],"measurement,":[120],"indices,":[122],"processing,":[124],"analysis":[126,244],"methods.":[127],"The":[128,238],"results":[129],"demonstrate":[130],"there":[132],"has":[133,283],"been":[134,284],"increase":[136],"scientific":[138],"evaluating":[140],"use":[142],"estimation":[147,340],"grasslands":[149,201,342],"during":[150],"period":[152],"2018\u20132022.":[153],"Most":[154],"carried":[159],"out":[160],"three":[162],"countries":[163],"(Germany,":[164],"China,":[165],"USA),":[167],"which":[168],"indicates":[169],"urgent":[171],"need":[172],"other":[176,317],"locations":[177,318],"where":[178],"ecosystems":[180],"abundant.":[182],"found":[184],"RGB":[185],"imaging":[186],"was":[187,223,234],"commonly":[190],"used":[191,224,258],"suitable":[196],"at":[202,218],"moment,":[204],"terms":[206],"cost\u2013benefit":[208],"processing":[211],"simplicity.":[212],"In":[213],"50%":[214],"studies,":[217],"least":[219,249],"vegetation":[221],"index":[222],"AGB;":[227],"Normalized":[229],"Difference":[230],"Vegetation":[231],"Index":[232],"(NDVI)":[233],"common.":[237],"popular":[240],"linear":[246],"regression,":[247],"partial":[248],"squares":[250],"regression":[251],"(PLSR),":[252],"random":[254],"forest.":[255],"Studies":[256],"spectral":[259],"structural":[261],"showed":[263],"models":[265,271],"incorporating":[266],"both":[267,286],"types":[269],"outperformed":[270],"utilizing":[272],"only":[273,292],"one.":[274],"also":[276],"observed":[277],"limited":[285],"spatially":[287],"temporally.":[289],"example,":[291],"small":[294],"number":[295,302],"papers":[297],"conducted":[298],"over":[300],"years":[304],"multiple":[307],"places,":[308],"suggesting":[309],"protocols":[312],"not":[314],"transferable":[315],"time":[320],"points.":[321],"Despite":[322],"these":[323],"limitations,":[324],"light":[328],"rapid":[331],"advances,":[332],"anticipate":[334],"will":[343],"continue":[344],"improving":[345],"may":[347],"become":[348],"commercialized":[349],"farming":[351],"applications":[352],"near":[355],"future.":[356]},"counts_by_year":[{"year":2026,"cited_by_count":15},{"year":2025,"cited_by_count":27},{"year":2024,"cited_by_count":26},{"year":2023,"cited_by_count":16}],"updated_date":"2026-06-17T08:01:34.144755","created_date":"2025-10-10T00:00:00"}
