{"id":"https://openalex.org/W1990128059","doi":"https://doi.org/10.1080/13658810601169899","title":"An evaluation of void\u2010filling interpolation methods for SRTM data","display_name":"An evaluation of void\u2010filling interpolation methods for SRTM data","publication_year":2007,"publication_date":"2007-09-04","ids":{"openalex":"https://openalex.org/W1990128059","doi":"https://doi.org/10.1080/13658810601169899","mag":"1990128059"},"language":"en","primary_location":{"id":"doi:10.1080/13658810601169899","is_oa":false,"landing_page_url":"https://doi.org/10.1080/13658810601169899","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":true,"oa_status":"green","oa_url":"https://hdl.handle.net/10568/43175","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5024136104","display_name":"H.I. Reuter","orcid":"https://orcid.org/0000-0001-6336-7801"},"institutions":[{"id":"https://openalex.org/I4210118689","display_name":"Joint Research Centre","ror":"https://ror.org/02qezmz13","country_code":"IT","type":"government","lineage":["https://openalex.org/I1320481043","https://openalex.org/I2800387288","https://openalex.org/I4210118689","https://openalex.org/I4210161702"]}],"countries":["IT"],"is_corresponding":true,"raw_author_name":"H. I. Reuter","raw_affiliation_strings":["European Commission\u2014DG Joint Research Centre, Institute for Environment and Sustainability\u2014Land Management and Natural Hazards Unit, TP 280, Via Fermi 1, I\u201021020 Ispra (VA), Italy","European Commission - DG Joint Research Centre, Institute for Environment and Sustainability - Land Management and Natural Hazards Unit, TP 280, Via Fermi 1, I-21020 Ispra (VA), Italy#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"European Commission\u2014DG Joint Research Centre, Institute for Environment and Sustainability\u2014Land Management and Natural Hazards Unit, TP 280, Via Fermi 1, I\u201021020 Ispra (VA), Italy","institution_ids":["https://openalex.org/I4210118689"]},{"raw_affiliation_string":"European Commission - DG Joint Research Centre, Institute for Environment and Sustainability - Land Management and Natural Hazards Unit, TP 280, Via Fermi 1, I-21020 Ispra (VA), Italy#TAB#","institution_ids":["https://openalex.org/I4210118689"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5108909908","display_name":"Andrew Nelson","orcid":"https://orcid.org/0000-0002-7249-3778"},"institutions":[{"id":"https://openalex.org/I4210118689","display_name":"Joint Research Centre","ror":"https://ror.org/02qezmz13","country_code":"IT","type":"government","lineage":["https://openalex.org/I1320481043","https://openalex.org/I2800387288","https://openalex.org/I4210118689","https://openalex.org/I4210161702"]}],"countries":["IT"],"is_corresponding":false,"raw_author_name":"A. Nelson","raw_affiliation_strings":["European Commission\u2014DG Joint Research Centre, Institute for Environment and Sustainability\u2014Global Environment Monitoring Unit, TP 440, Via Fermi 1, I\u201021020 Ispra (VA), Italy","European Commission - DG Joint Research Centre, Institute for Environment and Sustainability - Global Environment Monitoring Unit, TP 440, Via Fermi 1, I-21020 Ispra (VA), Italy#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"European Commission\u2014DG Joint Research Centre, Institute for Environment and Sustainability\u2014Global Environment Monitoring Unit, TP 440, Via Fermi 1, I\u201021020 Ispra (VA), Italy","institution_ids":["https://openalex.org/I4210118689"]},{"raw_affiliation_string":"European Commission - DG Joint Research Centre, Institute for Environment and Sustainability - Global Environment Monitoring Unit, TP 440, Via Fermi 1, I-21020 Ispra (VA), Italy#TAB#","institution_ids":["https://openalex.org/I4210118689"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5038971318","display_name":"Andy Jarvis","orcid":"https://orcid.org/0000-0001-6543-0798"},"institutions":[{"id":"https://openalex.org/I64492213","display_name":"International Center for Tropical Agriculture","ror":"https://ror.org/037wny167","country_code":"CO","type":"funder","lineage":["https://openalex.org/I1286583668","https://openalex.org/I64492213"]}],"countries":["CO"],"is_corresponding":false,"raw_author_name":"A. Jarvis","raw_affiliation_strings":["International Center for Tropical Agriculture (CIAT) and International Plant Genetic Resources Institute (IPGRI), Recta Cali\u2010Palmira, km 17, AA6713 Cali, Valle del Cauca, Colombia","International Center for Tropical Agriculture (CIAT) and International Plant Genetic Resources Institute (IPGRI), Recta Cali-Palmira, km 17, AA6713 Cali, Valle del Cauca, Colombia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"International Center for Tropical Agriculture (CIAT) and International Plant Genetic Resources Institute (IPGRI), Recta Cali\u2010Palmira, km 17, AA6713 Cali, Valle del Cauca, Colombia","institution_ids":["https://openalex.org/I64492213"]},{"raw_affiliation_string":"International Center for Tropical Agriculture (CIAT) and International Plant Genetic Resources Institute (IPGRI), Recta Cali-Palmira, km 17, AA6713 Cali, Valle del Cauca, Colombia","institution_ids":["https://openalex.org/I64492213"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5024136104"],"corresponding_institution_ids":["https://openalex.org/I4210118689"],"apc_list":null,"apc_paid":null,"fwci":10.5224,"has_fulltext":false,"cited_by_count":915,"citation_normalized_percentile":{"value":0.98763849,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":99,"max":100},"biblio":{"volume":"21","issue":"9","first_page":"983","last_page":"1008"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10770","display_name":"Soil Geostatistics and Mapping","score":0.9958999752998352,"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/T10770","display_name":"Soil Geostatistics and Mapping","score":0.9958999752998352,"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/T13282","display_name":"Automated Road and Building Extraction","score":0.9908999800682068,"subfield":{"id":"https://openalex.org/subfields/2212","display_name":"Ocean 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/T12157","display_name":"Geochemistry and Geologic Mapping","score":0.9889000058174133,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/shuttle-radar-topography-mission","display_name":"Shuttle Radar Topography Mission","score":0.9236342906951904},{"id":"https://openalex.org/keywords/inverse-distance-weighting","display_name":"Inverse distance weighting","score":0.8621108531951904},{"id":"https://openalex.org/keywords/terrain","display_name":"Terrain","score":0.6799524426460266},{"id":"https://openalex.org/keywords/digital-elevation-model","display_name":"Digital elevation model","score":0.6396382451057434},{"id":"https://openalex.org/keywords/void","display_name":"Void (composites)","score":0.5882554054260254},{"id":"https://openalex.org/keywords/interpolation","display_name":"Interpolation (computer graphics)","score":0.5670136213302612},{"id":"https://openalex.org/keywords/kriging","display_name":"Kriging","score":0.5360392332077026},{"id":"https://openalex.org/keywords/weighting","display_name":"Weighting","score":0.5297126770019531},{"id":"https://openalex.org/keywords/multivariate-interpolation","display_name":"Multivariate interpolation","score":0.4536428451538086},{"id":"https://openalex.org/keywords/inverse","display_name":"Inverse","score":0.4165857136249542},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.41470253467559814},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.3896835446357727},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.36226385831832886},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.34496110677719116},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.33972346782684326},{"id":"https://openalex.org/keywords/bilinear-interpolation","display_name":"Bilinear interpolation","score":0.27233248949050903},{"id":"https://openalex.org/keywords/geography","display_name":"Geography","score":0.26977062225341797},{"id":"https://openalex.org/keywords/geometry","display_name":"Geometry","score":0.2520560026168823},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.2159479260444641},{"id":"https://openalex.org/keywords/cartography","display_name":"Cartography","score":0.2076222002506256},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.17681145668029785},{"id":"https://openalex.org/keywords/materials-science","display_name":"Materials science","score":0.08655545115470886},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.0804082453250885}],"concepts":[{"id":"https://openalex.org/C184149073","wikidata":"https://www.wikidata.org/wiki/Q965136","display_name":"Shuttle Radar Topography Mission","level":3,"score":0.9236342906951904},{"id":"https://openalex.org/C47872207","wikidata":"https://www.wikidata.org/wiki/Q1430701","display_name":"Inverse distance weighting","level":4,"score":0.8621108531951904},{"id":"https://openalex.org/C161840515","wikidata":"https://www.wikidata.org/wiki/Q186131","display_name":"Terrain","level":2,"score":0.6799524426460266},{"id":"https://openalex.org/C181843262","wikidata":"https://www.wikidata.org/wiki/Q640492","display_name":"Digital elevation model","level":2,"score":0.6396382451057434},{"id":"https://openalex.org/C2779772531","wikidata":"https://www.wikidata.org/wiki/Q19689164","display_name":"Void (composites)","level":2,"score":0.5882554054260254},{"id":"https://openalex.org/C137800194","wikidata":"https://www.wikidata.org/wiki/Q11713455","display_name":"Interpolation (computer graphics)","level":3,"score":0.5670136213302612},{"id":"https://openalex.org/C81692654","wikidata":"https://www.wikidata.org/wiki/Q225926","display_name":"Kriging","level":2,"score":0.5360392332077026},{"id":"https://openalex.org/C183115368","wikidata":"https://www.wikidata.org/wiki/Q856577","display_name":"Weighting","level":2,"score":0.5297126770019531},{"id":"https://openalex.org/C203332170","wikidata":"https://www.wikidata.org/wiki/Q6334079","display_name":"Multivariate interpolation","level":3,"score":0.4536428451538086},{"id":"https://openalex.org/C207467116","wikidata":"https://www.wikidata.org/wiki/Q4385666","display_name":"Inverse","level":2,"score":0.4165857136249542},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.41470253467559814},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.3896835446357727},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.36226385831832886},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.34496110677719116},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.33972346782684326},{"id":"https://openalex.org/C205203396","wikidata":"https://www.wikidata.org/wiki/Q612143","display_name":"Bilinear interpolation","level":2,"score":0.27233248949050903},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.26977062225341797},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.2520560026168823},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.2159479260444641},{"id":"https://openalex.org/C58640448","wikidata":"https://www.wikidata.org/wiki/Q42515","display_name":"Cartography","level":1,"score":0.2076222002506256},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.17681145668029785},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.08655545115470886},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0804082453250885},{"id":"https://openalex.org/C159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","level":1,"score":0.0},{"id":"https://openalex.org/C104114177","wikidata":"https://www.wikidata.org/wiki/Q79782","display_name":"Motion (physics)","level":2,"score":0.0},{"id":"https://openalex.org/C24890656","wikidata":"https://www.wikidata.org/wiki/Q82811","display_name":"Acoustics","level":1,"score":0.0}],"mesh":[],"locations_count":4,"locations":[{"id":"doi:10.1080/13658810601169899","is_oa":false,"landing_page_url":"https://doi.org/10.1080/13658810601169899","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"},{"id":"pmh:oai:cgspace.cgiar.org:10568/43175","is_oa":true,"landing_page_url":"https://hdl.handle.net/10568/43175","pdf_url":null,"source":{"id":"https://openalex.org/S4306402055","display_name":"CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1286583668","host_organization_name":"CGIAR","host_organization_lineage":["https://openalex.org/I1286583668"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Journal Article"},{"id":"pmh:oai:publications.jrc.ec.europa.eu:JRC34742","is_oa":false,"landing_page_url":"http://www.informaworld.com/10.1080/13658810601169899","pdf_url":null,"source":{"id":"https://openalex.org/S4306401126","display_name":"Joint Research Centre (European Commission)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I2800387288","host_organization_name":"European Commission","host_organization_lineage":["https://openalex.org/I2800387288"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Articles in Journals"},{"id":"pmh:ut:oai:ris.utwente.nl:publications/0d777214-9d8c-4a9a-9e82-bc14757f0458","is_oa":false,"landing_page_url":"https://research.utwente.nl/en/publications/an-evaluation-of-void--filling-interpolation-methods-for-srtm-data(0d777214-9d8c-4a9a-9e82-bc14757f0458).html","pdf_url":null,"source":{"id":"https://openalex.org/S4306401843","display_name":"Data Archiving and Networked Services (DANS)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1322597698","host_organization_name":"Royal Netherlands Academy of Arts and Sciences","host_organization_lineage":["https://openalex.org/I1322597698"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"International journal of geographical information science, 21(9), 983 - 1008","raw_type":"info:eu-repo/semantics/article"}],"best_oa_location":{"id":"pmh:oai:cgspace.cgiar.org:10568/43175","is_oa":true,"landing_page_url":"https://hdl.handle.net/10568/43175","pdf_url":null,"source":{"id":"https://openalex.org/S4306402055","display_name":"CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1286583668","host_organization_name":"CGIAR","host_organization_lineage":["https://openalex.org/I1286583668"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Journal Article"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/11","score":0.46000000834465027,"display_name":"Sustainable cities and communities"}],"awards":[],"funders":[{"id":"https://openalex.org/F4320332183","display_name":"U.S. Geological Survey","ror":"https://ror.org/035a68863"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":34,"referenced_works":["https://openalex.org/W181107242","https://openalex.org/W1482047413","https://openalex.org/W1565233179","https://openalex.org/W1600740555","https://openalex.org/W1966878029","https://openalex.org/W1972819089","https://openalex.org/W1979217898","https://openalex.org/W1981940178","https://openalex.org/W1988696756","https://openalex.org/W1990590197","https://openalex.org/W2011245634","https://openalex.org/W2017496690","https://openalex.org/W2025227102","https://openalex.org/W2026105918","https://openalex.org/W2027901189","https://openalex.org/W2036079720","https://openalex.org/W2039392834","https://openalex.org/W2045181013","https://openalex.org/W2061225400","https://openalex.org/W2063134268","https://openalex.org/W2075258897","https://openalex.org/W2076560102","https://openalex.org/W2092584996","https://openalex.org/W2095689986","https://openalex.org/W2107350444","https://openalex.org/W2111990660","https://openalex.org/W2135339218","https://openalex.org/W2136921327","https://openalex.org/W2142198950","https://openalex.org/W2152533454","https://openalex.org/W2171466305","https://openalex.org/W2337260128","https://openalex.org/W4250482990","https://openalex.org/W4285719527"],"related_works":["https://openalex.org/W2021907765","https://openalex.org/W69786412","https://openalex.org/W2357092082","https://openalex.org/W4221115393","https://openalex.org/W2389334698","https://openalex.org/W1965726555","https://openalex.org/W2800389260","https://openalex.org/W3163037427","https://openalex.org/W2362713997","https://openalex.org/W2101792336"],"abstract_inverted_index":{"The":[0],"Digital":[1],"Elevation":[2],"Model":[3],"that":[4,173],"has":[5,17],"been":[6,18],"derived":[7],"from":[8],"the":[9,21,34,39,87,111,120,135,138,145,149,174,183,189,196],"February":[10],"2000":[11],"Shuttle":[12],"Radar":[13],"Topography":[14],"Mission":[15],"(SRTM)":[16],"one":[19],"of":[20,38,70,78,104,119,129,137,144,156,176,188],"most":[22,88,112,139],"important":[23],"publicly":[24],"available":[25],"new":[26],"spatial":[27],"data":[28,40,49],"sets":[29],"in":[30,59,73,148,215,227,243,256],"recent":[31],"years.":[32],"However,":[33],"\u2018finished\u2019":[35],"grade":[36],"version":[37],"(also":[41],"referred":[42],"to":[43,98,109,192],"as":[44],"Version":[45],"2)":[46],"still":[47],"contains":[48],"voids":[50,63,100,121,147,161,214,226,242,255],"(some":[51],"836,000":[52],"km2)\u2014and":[53],"other":[54,76,257],"anomalies\u2014that":[55],"prevent":[56],"immediate":[57],"use":[58],"many":[60],"applications.":[61],"These":[62],"can":[64,199],"be":[65,200],"filled":[66],"using":[67,101,116],"a":[68,96,102,107,117,127,154],"range":[69],"interpolation":[71,208,221,239],"algorithms":[72,115],"conjunction":[74],"with":[75],"sources":[77],"elevation":[79],"data,":[80],"but":[81,159],"there":[82],"is":[83,179],"little":[84],"guidance":[85],"on":[86,123,153,181],"appropriate":[89,113,140],"void\u2010filling":[90,114,177],"method.":[91],"This":[92],"paper":[93],"describes:":[94],"(i)":[95],"method":[97,108,251],"fill":[99],"variety":[103],"interpolators,":[105],"(ii)":[106],"determine":[110],"classification":[118,136],"based":[122],"their":[124,130],"size":[125,169,184,213],"and":[126,133,166,185,211,224,229,247],"typology":[128],"surrounding":[131],"terrain;":[132,231],"(iii)":[134],"algorithm":[141,178],"for":[142,209,222,240,253],"each":[143],"3,339,913":[146],"SRTM":[150],"data.":[151],"Based":[152],"sample":[155],"1304":[157],"artificial":[158],"realistic":[160],"across":[162],"six":[163],"terrain":[164,186],"types":[165],"eight":[167],"void":[168],"classes,":[170],"we":[171],"found":[172],"choice":[175],"dependent":[180],"both":[182],"type":[187],"void.":[190],"Contrary":[191],"some":[193],"previous":[194],"findings,":[195],"best":[197],"methods":[198],"generalised":[201],"as:":[202],"kriging":[203],"or":[204,235],"inverse":[205,236],"distance":[206,237],"weighting":[207,238],"small":[210,223],"medium":[212],"relatively":[216],"flat":[217,245],"low\u2010lying":[218],"areas;":[219],"spline":[220,250],"medium\u2010sized":[225],"high\u2010altitude":[228],"dissected":[230],"triangular":[232],"irregular":[233],"network":[234],"large":[241,254],"very":[244],"areas,":[246],"an":[248],"advanced":[249],"(ANUDEM)":[252],"terrains.":[258]},"counts_by_year":[{"year":2026,"cited_by_count":40},{"year":2025,"cited_by_count":58},{"year":2024,"cited_by_count":84},{"year":2023,"cited_by_count":53},{"year":2022,"cited_by_count":108},{"year":2021,"cited_by_count":91},{"year":2020,"cited_by_count":69},{"year":2019,"cited_by_count":56},{"year":2018,"cited_by_count":45},{"year":2017,"cited_by_count":43},{"year":2016,"cited_by_count":40},{"year":2015,"cited_by_count":51},{"year":2014,"cited_by_count":42},{"year":2013,"cited_by_count":45},{"year":2012,"cited_by_count":25}],"updated_date":"2026-08-15T07:11:24.734988","created_date":"2025-10-10T00:00:00"}
