{"id":"https://openalex.org/W2076038726","doi":"https://doi.org/10.1080/13658810902798107","title":"Investigation of aggregation effects in vegetation condition monitoring at a national scale","display_name":"Investigation of aggregation effects in vegetation condition monitoring at a national scale","publication_year":2010,"publication_date":"2010-03-16","ids":{"openalex":"https://openalex.org/W2076038726","doi":"https://doi.org/10.1080/13658810902798107","mag":"2076038726"},"language":"en","primary_location":{"id":"doi:10.1080/13658810902798107","is_oa":false,"landing_page_url":"https://doi.org/10.1080/13658810902798107","pdf_url":null,"source":{"id":"https://openalex.org/S4210181446","display_name":"International Journal of Geographical Information Systems","issn_l":"0269-3798","issn":["0269-3798","1362-3087"],"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547","https://openalex.org/P4310320449"],"host_organization_lineage_names":["Taylor & Francis","Informa"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"International Journal of Geographical Information Science","raw_type":"journal-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/A5040821431","display_name":"Thomas Alexandridis","orcid":"https://orcid.org/0000-0003-1893-6301"},"institutions":[{"id":"https://openalex.org/I21370196","display_name":"Aristotle University of Thessaloniki","ror":"https://ror.org/02j61yw88","country_code":"GR","type":"education","lineage":["https://openalex.org/I21370196"]}],"countries":["GR"],"is_corresponding":true,"raw_author_name":"T. K. Alexandridis","raw_affiliation_strings":["Aristotle University of Thessaloniki","Lab of Remote Sensing and GIS, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Aristotle University of Thessaloniki","institution_ids":["https://openalex.org/I21370196"]},{"raw_affiliation_string":"Lab of Remote Sensing and GIS, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece","institution_ids":["https://openalex.org/I21370196"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5053131585","display_name":"Thomas Katagis","orcid":"https://orcid.org/0000-0002-1322-7699"},"institutions":[{"id":"https://openalex.org/I21370196","display_name":"Aristotle University of Thessaloniki","ror":"https://ror.org/02j61yw88","country_code":"GR","type":"education","lineage":["https://openalex.org/I21370196"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"T. Katagis","raw_affiliation_strings":["Aristotle University of Thessaloniki","Lab of Forest Management and Remote Sensing, School of Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, Greece#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Aristotle University of Thessaloniki","institution_ids":["https://openalex.org/I21370196"]},{"raw_affiliation_string":"Lab of Forest Management and Remote Sensing, School of Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, Greece#TAB#","institution_ids":["https://openalex.org/I21370196"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5090395144","display_name":"Ioannis Z. Gitas","orcid":"https://orcid.org/0000-0003-0056-5629"},"institutions":[{"id":"https://openalex.org/I21370196","display_name":"Aristotle University of Thessaloniki","ror":"https://ror.org/02j61yw88","country_code":"GR","type":"education","lineage":["https://openalex.org/I21370196"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"I. Z. Gitas","raw_affiliation_strings":["Aristotle University of Thessaloniki","Lab of Forest Management and Remote Sensing, School of Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, Greece#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Aristotle University of Thessaloniki","institution_ids":["https://openalex.org/I21370196"]},{"raw_affiliation_string":"Lab of Forest Management and Remote Sensing, School of Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, Greece#TAB#","institution_ids":["https://openalex.org/I21370196"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5111822878","display_name":"N. Silleos","orcid":null},"institutions":[{"id":"https://openalex.org/I21370196","display_name":"Aristotle University of Thessaloniki","ror":"https://ror.org/02j61yw88","country_code":"GR","type":"education","lineage":["https://openalex.org/I21370196"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"N. G. Silleos","raw_affiliation_strings":["Aristotle University of Thessaloniki","Lab of Remote Sensing and GIS, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Aristotle University of Thessaloniki","institution_ids":["https://openalex.org/I21370196"]},{"raw_affiliation_string":"Lab of Remote Sensing and GIS, School of Agriculture, Aristotle University of Thessaloniki, Thessaloniki, Greece","institution_ids":["https://openalex.org/I21370196"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5040770611","display_name":"Kent M. Eskridge","orcid":"https://orcid.org/0000-0002-0582-4899"},"institutions":[{"id":"https://openalex.org/I114395901","display_name":"University of Nebraska\u2013Lincoln","ror":"https://ror.org/043mer456","country_code":"US","type":"education","lineage":["https://openalex.org/I114395901"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"K. M. Eskridge","raw_affiliation_strings":["University of Nebraska","Department of Statistics, University of Nebraska\u2013Lincoln, NE, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Nebraska","institution_ids":[]},{"raw_affiliation_string":"Department of Statistics, University of Nebraska\u2013Lincoln, NE, USA","institution_ids":["https://openalex.org/I114395901"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5028310528","display_name":"George Gritzas","orcid":"https://orcid.org/0000-0001-9073-5884"},"institutions":[{"id":"https://openalex.org/I21370196","display_name":"Aristotle University of Thessaloniki","ror":"https://ror.org/02j61yw88","country_code":"GR","type":"education","lineage":["https://openalex.org/I21370196"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"G. Gritzas","raw_affiliation_strings":["School of Urban-Regional Planning and Development Engineering, Aristotle University of Thessaloniki","School of Urban-Regional Planning and Development Engineering, Aristotle University of Thessaloniki, Veroia, Greece#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Urban-Regional Planning and Development Engineering, Aristotle University of Thessaloniki","institution_ids":["https://openalex.org/I21370196"]},{"raw_affiliation_string":"School of Urban-Regional Planning and Development Engineering, Aristotle University of Thessaloniki, Veroia, Greece#TAB#","institution_ids":["https://openalex.org/I21370196"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5040821431"],"corresponding_institution_ids":["https://openalex.org/I21370196"],"apc_list":null,"apc_paid":null,"fwci":0.5875,"has_fulltext":false,"cited_by_count":14,"citation_normalized_percentile":{"value":0.71966663,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":97},"biblio":{"volume":"24","issue":"4","first_page":"507","last_page":"521"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10111","display_name":"Remote Sensing in Agriculture","score":0.9998000264167786,"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":0.9998000264167786,"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/T11164","display_name":"Remote Sensing and LiDAR Applications","score":0.998199999332428,"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/T10226","display_name":"Land Use and Ecosystem Services","score":0.9979000091552734,"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/normalized-difference-vegetation-index","display_name":"Normalized Difference Vegetation Index","score":0.7435298562049866},{"id":"https://openalex.org/keywords/vegetation","display_name":"Vegetation (pathology)","score":0.6695661544799805},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.5829448699951172},{"id":"https://openalex.org/keywords/scale","display_name":"Scale (ratio)","score":0.5393692255020142},{"id":"https://openalex.org/keywords/homogeneity","display_name":"Homogeneity (statistics)","score":0.5335282683372498},{"id":"https://openalex.org/keywords/environmental-science","display_name":"Environmental science","score":0.5332115888595581},{"id":"https://openalex.org/keywords/geography","display_name":"Geography","score":0.4764026701450348},{"id":"https://openalex.org/keywords/mediterranean-climate","display_name":"Mediterranean climate","score":0.4389733076095581},{"id":"https://openalex.org/keywords/cartography","display_name":"Cartography","score":0.41182610392570496},{"id":"https://openalex.org/keywords/physical-geography","display_name":"Physical geography","score":0.3798363506793976},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.2426222860813141},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.1940394639968872},{"id":"https://openalex.org/keywords/ecology","display_name":"Ecology","score":0.17445573210716248},{"id":"https://openalex.org/keywords/leaf-area-index","display_name":"Leaf area index","score":0.08509901165962219}],"concepts":[{"id":"https://openalex.org/C1549246","wikidata":"https://www.wikidata.org/wiki/Q718775","display_name":"Normalized Difference Vegetation Index","level":3,"score":0.7435298562049866},{"id":"https://openalex.org/C2776133958","wikidata":"https://www.wikidata.org/wiki/Q7918366","display_name":"Vegetation (pathology)","level":2,"score":0.6695661544799805},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.5829448699951172},{"id":"https://openalex.org/C2778755073","wikidata":"https://www.wikidata.org/wiki/Q10858537","display_name":"Scale (ratio)","level":2,"score":0.5393692255020142},{"id":"https://openalex.org/C142259097","wikidata":"https://www.wikidata.org/wiki/Q5891314","display_name":"Homogeneity (statistics)","level":2,"score":0.5335282683372498},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.5332115888595581},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.4764026701450348},{"id":"https://openalex.org/C4646841","wikidata":"https://www.wikidata.org/wiki/Q13996","display_name":"Mediterranean climate","level":2,"score":0.4389733076095581},{"id":"https://openalex.org/C58640448","wikidata":"https://www.wikidata.org/wiki/Q42515","display_name":"Cartography","level":1,"score":0.41182610392570496},{"id":"https://openalex.org/C100970517","wikidata":"https://www.wikidata.org/wiki/Q52107","display_name":"Physical geography","level":1,"score":0.3798363506793976},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.2426222860813141},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.1940394639968872},{"id":"https://openalex.org/C18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","level":1,"score":0.17445573210716248},{"id":"https://openalex.org/C25989453","wikidata":"https://www.wikidata.org/wiki/Q446746","display_name":"Leaf area index","level":2,"score":0.08509901165962219},{"id":"https://openalex.org/C166957645","wikidata":"https://www.wikidata.org/wiki/Q23498","display_name":"Archaeology","level":1,"score":0.0},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"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/C142724271","wikidata":"https://www.wikidata.org/wiki/Q7208","display_name":"Pathology","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1080/13658810902798107","is_oa":false,"landing_page_url":"https://doi.org/10.1080/13658810902798107","pdf_url":null,"source":{"id":"https://openalex.org/S4210181446","display_name":"International Journal of Geographical Information Systems","issn_l":"0269-3798","issn":["0269-3798","1362-3087"],"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547","https://openalex.org/P4310320449"],"host_organization_lineage_names":["Taylor & Francis","Informa"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"International Journal of Geographical Information Science","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.6800000071525574,"display_name":"Life in Land","id":"https://metadata.un.org/sdg/15"}],"awards":[],"funders":[{"id":"https://openalex.org/F4320338080","display_name":"European Social Fund","ror":"https://ror.org/00k4n6c32"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":43,"referenced_works":["https://openalex.org/W412523498","https://openalex.org/W1024940123","https://openalex.org/W1504942104","https://openalex.org/W1580289893","https://openalex.org/W1586356417","https://openalex.org/W1605592858","https://openalex.org/W1965556652","https://openalex.org/W1967104623","https://openalex.org/W1971364019","https://openalex.org/W1978384929","https://openalex.org/W1978617972","https://openalex.org/W1985395583","https://openalex.org/W1987352360","https://openalex.org/W2003951484","https://openalex.org/W2006213402","https://openalex.org/W2030861104","https://openalex.org/W2032013744","https://openalex.org/W2034589021","https://openalex.org/W2036706101","https://openalex.org/W2044678905","https://openalex.org/W2045778781","https://openalex.org/W2063623478","https://openalex.org/W2067206505","https://openalex.org/W2072093516","https://openalex.org/W2080868907","https://openalex.org/W2087965082","https://openalex.org/W2094420085","https://openalex.org/W2098695466","https://openalex.org/W2109097024","https://openalex.org/W2110567444","https://openalex.org/W2113410727","https://openalex.org/W2115312620","https://openalex.org/W2115952782","https://openalex.org/W2122843024","https://openalex.org/W2156572918","https://openalex.org/W2167666757","https://openalex.org/W2174597041","https://openalex.org/W2500035193","https://openalex.org/W3139997078","https://openalex.org/W3146678827","https://openalex.org/W3169878478","https://openalex.org/W4254557587","https://openalex.org/W4285719527"],"related_works":["https://openalex.org/W2413001789","https://openalex.org/W2988456953","https://openalex.org/W2072076847","https://openalex.org/W2902405216","https://openalex.org/W2792045142","https://openalex.org/W4224279790","https://openalex.org/W2801553144","https://openalex.org/W2366156370","https://openalex.org/W2368915900","https://openalex.org/W2920258086"],"abstract_inverted_index":{"Monitoring":[0,188],"vegetation":[1,34,99,178,211],"condition":[2,100,179,212],"is":[3,172,201,205],"an":[4,30],"important":[5,31],"issue":[6],"in":[7,11,33,58,66,98,129,158,176,184,217],"the":[8,39,69,73,78,89,92,103,118,130,141,148,166,190,206,225,236,242],"Mediterranean":[9],"region,":[10],"terms":[12],"of":[13,25,43,46,83,91,127,132,229],"both":[14],"securing":[15],"food":[16],"and":[17,41,56,77,147,232,246],"preventing":[18],"fires.":[19],"Vegetation":[20,112],"indices":[21],"(VIs),":[22],"mathematical":[23],"transformations":[24],"reflectance":[26],"bands,":[27],"have":[28],"played":[29],"role":[32],"monitoring,":[35],"as":[36],"they":[37],"depict":[38],"abundance":[40],"health":[42],"vegetation.":[44],"Instead":[45],"storing":[47],"raster":[48],"VI":[49],"maps,":[50],"aggregated":[51],"statistics":[52],"can":[53],"be":[54],"derived":[55],"used":[57,65],"long-term":[59],"monitoring.":[60],"The":[61,81,125],"aggregation":[62,105,128,168],"schemes":[63,106],"(zonations)":[64],"Greece":[67,185,218],"are":[68,248],"forest":[70],"service":[71,75,192],"units,":[72,76],"fire":[74,191],"administrative":[79],"units.":[80],"purpose":[82],"this":[84],"work":[85],"was":[86],"to":[87,235],"explore":[88],"effect":[90,175],"modifiable":[93],"areal":[94],"unit":[95],"problem":[96],"(MAUP)":[97],"monitoring":[101,177,210],"at":[102,165],"above-mentioned":[104],"using":[107,189],"16":[108],"days":[109],"Normalized":[110],"Difference":[111],"Index":[113],"(NDVI)":[114],"composites":[115],"acquired":[116],"by":[117,136],"moderate":[119],"resolution":[120],"imaging":[121],"spectroradiometer":[122],"satellite":[123],"sensor.":[124],"effects":[126],"context":[131],"MAUP":[133,174],"were":[134,154,161,222],"examined":[135,243],"analyzing":[137],"variance,":[138],"from":[139],"which":[140],"among":[142],"polygon":[143,150],"variation":[144,151],"(objects'":[145],"heterogeneity)":[146],"within":[149],"(pixels'":[152],"homogeneity)":[153],"derived.":[155],"Significant":[156],"differences":[157],"objects'":[159],"heterogeneity":[160],"observed":[162],"when":[163],"aggregating":[164],"three":[167],"schemes;":[169],"therefore":[170,199],"there":[171,200],"a":[173,181,214],"on":[180,213,241],"nationwide":[182,215],"scale":[183,216],"with":[186,219],"NDVI.":[187,220],"units":[193],"has":[194],"significantly":[195],"higher":[196],"pixels'":[197],"homogeneity;":[198],"indication":[202],"that":[203],"it":[204],"most":[207],"appropriate":[208],"for":[209],"Results":[221],"consistent":[223],"between":[224],"two":[226],"major":[227],"types":[228],"vegetation,":[230],"natural":[231],"agricultural.":[233],"According":[234],"statistical":[237],"validation,":[238],"conclusions":[239],"based":[240],"years":[244],"(2003":[245],"2004)":[247],"justified.":[249]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":2},{"year":2024,"cited_by_count":1},{"year":2022,"cited_by_count":1},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":1},{"year":2013,"cited_by_count":1}],"updated_date":"2026-08-15T07:11:24.734988","created_date":"2025-10-10T00:00:00"}