Dataset Open Access
Orthophotos and DSMs derived from RPAS flights over the nature reserve Zwin in Flanders, Belgium
Vanden Borre, Jeroen;
Klaas Pauly;
Van Hoey, Stijn;
De Reu, Jeroen;
Desmet, Peter
DCAT Export
<?xml version='1.0' encoding='utf-8'?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:adms="http://www.w3.org/ns/adms#" xmlns:cnt="http://www.w3.org/2011/content#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dct="http://purl.org/dc/terms/" xmlns:dctype="http://purl.org/dc/dcmitype/" xmlns:dcat="http://www.w3.org/ns/dcat#" xmlns:duv="http://www.w3.org/ns/duv#" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:frapo="http://purl.org/cerif/frapo/" xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#" xmlns:gsp="http://www.opengis.net/ont/geosparql#" xmlns:locn="http://www.w3.org/ns/locn#" xmlns:org="http://www.w3.org/ns/org#" xmlns:owl="http://www.w3.org/2002/07/owl#" xmlns:prov="http://www.w3.org/ns/prov#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:schema="http://schema.org/" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:vcard="http://www.w3.org/2006/vcard/ns#" xmlns:wdrs="http://www.w3.org/2007/05/powder-s#">
<rdf:Description rdf:about="https://doi.org/10.5281/zenodo.3096021">
<rdf:type rdf:resource="http://www.w3.org/ns/dcat#Dataset"/>
<dct:type rdf:resource="http://purl.org/dc/dcmitype/Dataset"/>
<dct:identifier rdf:datatype="http://www.w3.org/2001/XMLSchema#anyURI">https://doi.org/10.5281/zenodo.3096021</dct:identifier>
<foaf:page rdf:resource="https://doi.org/10.5281/zenodo.3096021"/>
<dct:creator>
<rdf:Description rdf:about="http://orcid.org/0000-0002-0153-7243">
<rdf:type rdf:resource="http://xmlns.com/foaf/0.1/Agent"/>
<foaf:name>Vanden Borre, Jeroen</foaf:name>
<foaf:givenName>Jeroen</foaf:givenName>
<foaf:familyName>Vanden Borre</foaf:familyName>
<org:memberOf>
<foaf:Organization>
<foaf:name>Research Institute for Nature and Forest (INBO)</foaf:name>
</foaf:Organization>
</org:memberOf>
</rdf:Description>
</dct:creator>
<dct:creator>
<rdf:Description rdf:about="http://orcid.org/0000-0002-2183-1917">
<rdf:type rdf:resource="http://xmlns.com/foaf/0.1/Agent"/>
<foaf:name>Klaas Pauly</foaf:name>
<org:memberOf>
<foaf:Organization>
<foaf:name>Flemish Institute for Technological Research (VITO)</foaf:name>
</foaf:Organization>
</org:memberOf>
</rdf:Description>
</dct:creator>
<dct:creator>
<rdf:Description rdf:about="http://orcid.org/0000-0001-6413-3185">
<rdf:type rdf:resource="http://xmlns.com/foaf/0.1/Agent"/>
<foaf:name>Van Hoey, Stijn</foaf:name>
<foaf:givenName>Stijn</foaf:givenName>
<foaf:familyName>Van Hoey</foaf:familyName>
<org:memberOf>
<foaf:Organization>
<foaf:name>Research Institute for Nature and Forest (INBO)</foaf:name>
</foaf:Organization>
</org:memberOf>
</rdf:Description>
</dct:creator>
<dct:creator>
<rdf:Description rdf:about="http://orcid.org/0000-0001-9454-0021">
<rdf:type rdf:resource="http://xmlns.com/foaf/0.1/Agent"/>
<foaf:name>De Reu, Jeroen</foaf:name>
<foaf:givenName>Jeroen</foaf:givenName>
<foaf:familyName>De Reu</foaf:familyName>
<org:memberOf>
<foaf:Organization>
<foaf:name>Research Institute for Nature and Forest (INBO)</foaf:name>
</foaf:Organization>
</org:memberOf>
</rdf:Description>
</dct:creator>
<dct:creator>
<rdf:Description rdf:about="http://orcid.org/0000-0002-8442-8025">
<rdf:type rdf:resource="http://xmlns.com/foaf/0.1/Agent"/>
<foaf:name>Desmet, Peter</foaf:name>
<foaf:givenName>Peter</foaf:givenName>
<foaf:familyName>Desmet</foaf:familyName>
<org:memberOf>
<foaf:Organization>
<foaf:name>Research Institute for Nature and Forest (INBO)</foaf:name>
</foaf:Organization>
</org:memberOf>
</rdf:Description>
</dct:creator>
<dct:title>Orthophotos and DSMs derived from RPAS flights over the nature reserve Zwin in Flanders, Belgium</dct:title>
<dct:publisher>
<foaf:Agent>
<foaf:name>Zenodo</foaf:name>
</foaf:Agent>
</dct:publisher>
<dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">2019</dct:issued>
<dcat:keyword>orthophoto</dcat:keyword>
<dcat:keyword>digital surface model</dcat:keyword>
<dcat:keyword>drone</dcat:keyword>
<dcat:keyword>RPAS</dcat:keyword>
<dcat:keyword>remote sensing</dcat:keyword>
<dcat:keyword>nature management</dcat:keyword>
<dcat:keyword>LifeWatch</dcat:keyword>
<dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2019-06-17</dct:issued>
<dct:language rdf:resource="http://publications.europa.eu/resource/authority/language/ENG"/>
<owl:sameAs rdf:resource="https://zenodo.org/record/3096021"/>
<adms:identifier>
<adms:Identifier>
<skos:notation rdf:datatype="http://www.w3.org/2001/XMLSchema#anyURI">https://zenodo.org/record/3096021</skos:notation>
</adms:Identifier>
</adms:identifier>
<dct:isVersionOf rdf:resource="https://doi.org/10.5281/zenodo.3096020"/>
<dct:isPartOf rdf:resource="https://zenodo.org/communities/inbo"/>
<dct:isPartOf rdf:resource="https://zenodo.org/communities/lifewatch-be"/>
<dct:isPartOf rdf:resource="https://zenodo.org/communities/oscibio"/>
<dct:description><p><strong>Study area</strong></p> <p>The Zwin is a nature reserve situated along the Belgian North Sea coast, northeast of Knokke, in the province of West-Flanders, Flanders, Belgium. The area is managed by the Flemish Agency for Nature and Forest and consists of a tidal marsh, coastal dunes with <em>Ammophila arenaria</em>, dune grasslands and/or shrub (<em>Hippophae rhamnoides</em>, <em>Salix repens</em>), and a transitional grassland zone that stretches from the inner edge of the coastal dunes into the polders.</p> <p><strong>Data collection</strong></p> <p>Data were collected by the <a href="http://www.inbo.be/en">Research Institute for Nature and Forest (INBO)</a> with a fixed wing drone Gatewing X100 in 2014 and 2015 (15 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. CIR (color-infrared) data were acquired using a NIR-enabled Ricoh GR Digital IV camera, with the following info bands: 1: NIR, 2: red, 3: green, 4: alpha channel.</p> <p><strong>Data processing</strong></p> <p>The raw data were processed to Digital Surface Models and orthophotos by the <a href="https://vito.be/en">Flemish Institute for Technological Research (VITO)</a> 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.</p> <p><strong>Coordinate reference system</strong></p> <p>All geospatial data have the coordinate reference system <code>EPSG:31370 - Belgian Lambert 72</code>.</p> <p><strong>Files</strong></p> <ul> <li><strong>Raw flight data</strong>: images and logs collected by the drone during flight. These files are zipped per flight, with the date (<code>yyyymmdd</code>) and flight number (<code>x</code>) indicated in the file name (<code>flight_yyyymmdd_Zwin_x.zip</code>).</li> <li><strong>Processed data</strong>: Digital Surface Models (<code>filename_DSM.tif</code>) and orthophotos (<code>filename_Ortho.tif</code>) stitched together from the raw data. The included flights are indicated in the file name (e.g. 6 flights for <code>20150709_Zwin_1-3_20150710_Zwin_1-3_DSM.tif</code>).</li> <li><strong>Ground control points</strong>: fixed ground control points (GCP) were placed on 2014-04-07, coordinates of which are available in <code>GCP_20140407_Zwin_fixed.tsv</code>. These GCPs are visible (but fading over time) in all orthophotos except <code>20151012_Zwin_1-4_Ortho.tif</code> which covers a different area. Additional temporary GCPs were placed on 2014-04-07, 2014-04-10 and 2015-07-09 (visible in orthophotos of those dates), coordinates of which are available in the respective <code>GCP_yyyymmdd_Zwin.tsv</code> file.</li> </ul> <p><strong>Cloud Optimized GeoTIFF</strong></p> <p>The most efficient way to explore the processed data is by loading the <a href="https://www.cogeo.org/">Cloud Optimized GeoTIFFs</a> we created for each processed file. Copy one of the file URLs below and follow e.g. the <a href="https://www.cogeo.org/qgis-tutorial.html">QGIS tutorial</a> to load this type of file.</p> <ul> <li><code>http://s3-eu-west-1.amazonaws.com/lw-remote-sensing/cogeo/20140407_Zwin_1-2_DSM.tif</code></li> <li><code>http://s3-eu-west-1.amazonaws.com/lw-remote-sensing/cogeo/20140407_Zwin_1-2_Ortho.tif</code>&nbsp;CIR</li> <li><code>http://s3-eu-west-1.amazonaws.com/lw-remote-sensing/cogeo/20140410_Zwin_1-3_DSM.tif</code></li> <li><code>http://s3-eu-west-1.amazonaws.com/lw-remote-sensing/cogeo/20140410_Zwin_1-3_Ortho.tif</code>&nbsp;CIR</li> <li><code>http://s3-eu-west-1.amazonaws.com/lw-remote-sensing/cogeo/20150709_Zwin_1-3_20150710_Zwin_1-3_DSM.tif</code></li> <li><code>http://s3-eu-west-1.amazonaws.com/lw-remote-sensing/cogeo/20150709_Zwin_1-3_20150710_Zwin_1-3_Ortho.tif</code> RGB</li> <li><code>http://s3-eu-west-1.amazonaws.com/lw-remote-sensing/cogeo/20151012_Zwin_1-4_DSM.tif</code></li> <li><code>http://s3-eu-west-1.amazonaws.com/lw-remote-sensing/cogeo/20151012_Zwin_1-4_Ortho.tif</code> RGB</li> </ul> <p>See <a href="https://s3-eu-west-1.amazonaws.com/lw-remote-sensing/index.html">this page</a> for an overview of public INBO RPAS data.</p></dct:description>
<dct:description xml:lang="">This dataset was collected using infrastructure provided by INBO and funded by Research Foundation - Flanders (FWO) as part of the Belgian contribution to LifeWatch.</dct:description>
<dct:accessRights rdf:resource="http://publications.europa.eu/resource/authority/access-right/PUBLIC"/>
<dct:accessRights>
<dct:RightsStatement rdf:about="info:eu-repo/semantics/openAccess">
<rdfs:label>Open Access</rdfs:label>
</dct:RightsStatement>
</dct:accessRights>
<dcat:distribution>
<dcat:Distribution>
<dct:license rdf:resource="http://creativecommons.org/publicdomain/zero/1.0/legalcode"/>
<dcat:accessURL rdf:resource="https://doi.org/10.5281/zenodo.3096021"/>
</dcat:Distribution>
</dcat:distribution>
</rdf:Description>
</rdf:RDF>
63
101
views
downloads
| All versions | This version | |
|---|---|---|
| Views | 63 | 63 |
| Downloads | 101 | 101 |
| Data volume | 313.4 GB | 313.4 GB |
| Unique views | 53 | 53 |
| Unique downloads | 20 | 20 |
Indexed in
- Publication date:
- June 17, 2019
- DOI:
-
- Keyword(s):
- orthophoto digital surface model drone RPAS remote sensing nature management LifeWatch
- Communities:
- License (for files):
- Creative Commons Zero v1.0 Universal