{"datasetrec":{"DasID":7954,"Acronym":null,"StandardTitle":"Orthophotos and DSMs derived from RPAS flights over the nature reserve Kalmthoutse Heide in Flanders, Belgium","OrigTitle":null,"OrigTitleLangID":null,"OrigTitleLangCode":null,"OrigTitleLang":null,"OrigTitleLangNL":null,"VersionName":"1","ContactEmail":null,"VersionDate":null,"VersionDay":17,"VersionMonth":6,"VersionYear":2019,"SizeReference":null,"EngAbstract":"Data were collected by the Research Institute for Nature and Forest (INBO) with a fixed wing drone Gatewing X100 in 2015 and 2016 (8 flights). RGB data were acquired using an off-the-shelf Ricoh GR Digital IV camera, with the following image bands: 1: red, 2: green, 3: blue, 4: alpha channel.","EngDescr":"Study area: The Kalmthoutse Heide is a nature reserve situated north of Kalmthout, in the province of Antwerp, Flanders, Belgium. It is part of the Cross-Border Nature Park De Zoom - Kalmthoutse Heide in the Netherlands and Belgium. The Kalmthoutse Heide is managed by the Flemish Agency for Nature and Forest and consists of wet and dry heathlands, inland dunes, forests and moorland pools. In this area, there is particular interest in monitoring the encroachment of the heathlands by Molinia caerulea and Campylopus introflexus.\r\n<p><br>\r\nData processing: The raw data were processed to Digital Surface Models and orthophotos by the Flemish Institute for Technological Research (VITO) in 2017. Images with coarse GPS coordinates were imported and processed in Agisoft PhotoScan Pro 1.4.x, a structure-from-motion (SfM) based photogrammetry software program. After extraction and matching of tie points, a bundle adjustment leads to a sparse point cloud and a refined set of camera position and orientation values. Ground control points (either artificially installed markers on the terrain, or other photo-identifiable points, measured on the ground with RTK GNSS) were used to further refine the camera calibration and obtain a pixel-level georeferencing accuracy. From there, a point cloud densification and classification into ground and non-ground points was performed, leading to a rasterized digital surface model (DSM) and digital terrain model (DTM). Finally, a true orthomosaic was projected onto the DTM.\r\n<p><br>\r\nCoordinate reference system: All geospatial data have the coordinate reference system EPSG:31370 - Belgian Lambert 72.\r\n<p><br>\r\nThe DOI in the citation represents all versions. To find the DOI of the different versions, go to the Zenodo record.","OrigAbstract":null,"OrigDescr":null,"Comments":null,"ReleaseDate":null,"ReleaseDate0":null,"OrigDescrLang":null,"EmbargoDate":null,"OrigDescrLangNL":null,"OrigLangCode":null,"OrigLangCodeExtended":null,"OrigLangID":null,"DescrCompFlag":0,"DescrTransFlag":0,"Citation":"Vanden Borre, Jeroen, Klaas Pauly, Van Hoey, Stijn, De Reu, Jeroen, & Desmet, Peter. (2019). Orthophotos and DSMs derived from RPAS flights over the nature reserve Kalmthoutse Heide in Flanders, Belgium [Data set]. Zenodo.","AccessConstraints":null,"UDate":"2021-12-07","CDate":"2021-12-07","CurrencyDate":null,"RevisionDate":null,"DateLastModified":{"date":"2026-05-14 01:44:00.153333","timezone_type":1,"timezone":"+02:00"},"CheckedFlag":0,"PublicFlag":1,"VlizCoreFlag":1,"MarineFlag":0,"FreshFlag":1,"BrackishFlag":0,"TerrestrialFlag":1,"StatusID":1,"DasType":"Data","DasTypeID":1,"DasOrigin":"Research: field survey","Progress":"Completed","AccessConstraint":"CC 0 (No Rights Reserved)","AccConstrEN":"CC 0 (No Rights Reserved)","AccConstrDisplay":"<a rel=\"license\" href=\"https://creativecommons.org/publicdomain/zero/1.0/\" target=\"_blank\"><img alt=\"CC0\" style=\"border:0px;height:15px;width:80px;vertical-align:middle;\" src=\"https://www.marinespecies.org/aphia/images/cc/cc-zero.png\" /></a> To the extent possible under law, the person who associated CC0 with this dataset has waived all copyright and related or neighboring rights to this dataset.","License":"https://creativecommons.org/publicdomain/zero/1.0/","AccConstrDescription":"CC0 enables scientists, educators, artists and other creators and owners of copyright- or database-protected content to waive those interests in their works and thereby place them as completely as possible in the public domain, so that others may freely build upon, enhance and reuse the works for any purposes without restriction under copyright or database law.","Lineage":null,"AccConID":19,"DOI":"10.5281/zenodo.3057591"},"dois":null,"spcols":null,"keywords":[{"ThesaurusTerm":"Belgium, Kalmthoutse Heide","ThesTypID":35,"ThesType":"Geoterms no link Marine Regions","Code":null,"Description":null,"OrigThesTerm":"Belgium, Kalmthoutse Heide","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Drone aircraft","ThesTypID":3,"ThesType":"Transportation Research Thesaurus","Code":"Qbkomh","Description":"Remotely-controlled or preprogrammed pilotless aircraft, usually military","OrigThesTerm":"Drone aircraft","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Environment management","ThesTypID":2,"ThesType":"CSA Technology Research Database Master Thesaurus","Code":null,"Description":null,"OrigThesTerm":"Environment management","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Modelling","ThesTypID":1,"ThesType":"ASFA Thesaurus List","Code":"c_230ab86c","Description":null,"OrigThesTerm":"Modelling","DutchTerm":"Modellering","URI":"http://aims.fao.org/aos/agrovoc/c_230ab86c","DasKeywordDescr":null},{"ThesaurusTerm":"Orthophotos","ThesTypID":2,"ThesType":"CSA Technology Research Database Master Thesaurus","Code":null,"Description":null,"OrigThesTerm":"Orthophotos","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Remote sensing","ThesTypID":1,"ThesType":"ASFA Thesaurus List","Code":"c_6498","Description":null,"OrigThesTerm":"Remote sensing","DutchTerm":"Teledetectie","URI":"http://aims.fao.org/aos/agrovoc/c_6498","DasKeywordDescr":null},{"ThesaurusTerm":"Unmanned aircraft","ThesTypID":2,"ThesType":"CSA Technology Research Database Master Thesaurus","Code":null,"Description":null,"OrigThesTerm":"Unmanned aircraft","DutchTerm":null,"URI":null,"DasKeywordDescr":null}],"parents":null,"children":null,"othrel":null,"othrelrev":null,"ownerships":[{"OrderNr":1,"Surname":"Vanden Borre","Firstname":"Jeroen","Initials":"J.","PerPublicFlag":1,"AdrID":null,"Email":null,"InsPublicFlag":1,"Acronym":"INBO","OrigNameLangCode":"en","OrigNameLangID":15,"FullOrigName":"Flemish Government; 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