[ { "@id": "https://w3id.org/sciencelive/np/RAyA6pt4EhMD7hZBXAwLJtBjsLYaYZQsoafauxS5BXjWw/Head", "@graph": [ { "@id": "https://w3id.org/sciencelive/np/RAyA6pt4EhMD7hZBXAwLJtBjsLYaYZQsoafauxS5BXjWw", "http://www.nanopub.org/nschema#hasAssertion": [ { "@id": "https://w3id.org/sciencelive/np/RAyA6pt4EhMD7hZBXAwLJtBjsLYaYZQsoafauxS5BXjWw/assertion" } ], "http://www.nanopub.org/nschema#hasProvenance": [ { "@id": "https://w3id.org/sciencelive/np/RAyA6pt4EhMD7hZBXAwLJtBjsLYaYZQsoafauxS5BXjWw/provenance" } ], "http://www.nanopub.org/nschema#hasPublicationInfo": [ { "@id": "https://w3id.org/sciencelive/np/RAyA6pt4EhMD7hZBXAwLJtBjsLYaYZQsoafauxS5BXjWw/pubinfo" } ], "@type": [ "http://www.nanopub.org/nschema#Nanopublication" ] } ] }, { "@id": "https://w3id.org/sciencelive/np/RAyA6pt4EhMD7hZBXAwLJtBjsLYaYZQsoafauxS5BXjWw/assertion", "@graph": [ { "@id": "https://w3id.org/sciencelive/np/RAyA6pt4EhMD7hZBXAwLJtBjsLYaYZQsoafauxS5BXjWw/po-delta-sourceextractor-study", "@type": [ "https://w3id.org/sciencelive/o/terms/FORRT-Replication-Study", "https://w3id.org/sciencelive/o/terms/Replication-Study" ], "http://www.w3.org/2000/01/rdf-schema#label": [ { "@value": "Astronomy Source Extractor applied to satellite night lights over the Po Delta" } ], "http://www.w3.org/2004/02/skos/core#related": [ { "@id": "http://www.wikidata.org/entity/Q180644" }, { "@id": "http://www.wikidata.org/entity/Q473972" } ], "https://w3id.org/sciencelive/o/terms/hasDeviationDescription": [ { "@value": "The Source Extractor tool is normally applied to astronomical sky images (FITS); here the input is a terrestrial satellite night-lights raster (GeoTIFF). Detection parameters are left at the tool defaults; no other changes were made to the tool or workflow." } ], "https://w3id.org/sciencelive/o/terms/hasDiscipline": [ { "@id": "http://www.wikidata.org/entity/Q199687" } ], "https://w3id.org/sciencelive/o/terms/hasMethodologyDescription": [ { "@value": "A NASA Black Marble (VNP46A4) annual VIIRS night-lights composite over the eastern Po Valley / Po Delta (tile h19v04) was retrieved via earthaccess, the radiance band extracted and written as a single-channel GeoTIFF (water/dark background, bright settlements). This was run through the Galaxy astronomy \"source-extractor\" tool (astroteam/source_extractor_astro_tool, built on SEP) on usegalaxy.eu via BioBlend, at tool defaults: detection threshold 1.5x the global background RMS, minimum area 5 pixels, deblending (nthresh 32, cont 0.005), background mesh 64x64. The tool returns a source catalog (position, flux, shape), a segmentation map and a sources overlay. The catalog and the radiance field were overlaid on the EU Natura 2000 polygons (EEA): the light-extent metric is the fraction of Po Delta pixels with radiance above 1 nW/cm^2/sr, and nearby settlements are catalog sources within ~10 km of the protected area. A local SEP path reproduces the catalog for credential-free runs." } ], "https://w3id.org/sciencelive/o/terms/hasScopeDescription": [ { "@value": "Whether the astronomy source-extraction workflow, applied to satellite night-lights imagery of the Po Delta region, detects lit settlements as discrete sources and yields a measure of the extent of artificial light within the Po Delta Natura 2000 protected area. In scope: settlement detection and a light-extent metric for the Po Delta from a single annual VIIRS composite, plus the proximity of detected settlements to the protected area. Out of scope: temporal trends, species-level biodiversity impacts, comparison against a dedicated Earth-observation settlement product, and sub-pixel or low-radiance light." } ], "https://w3id.org/sciencelive/o/terms/targetsClaim": [ { "@id": "https://w3id.org/sciencelive/np/RA2fQHXqmUHhYm46lrCjeXBQbX-h5uFBWo479kkgG5yO8/po-delta-light-intrusion" } ] } ] }, { "@id": "https://w3id.org/sciencelive/np/RAyA6pt4EhMD7hZBXAwLJtBjsLYaYZQsoafauxS5BXjWw/provenance", "@graph": [ { "@id": "https://w3id.org/sciencelive/np/RAyA6pt4EhMD7hZBXAwLJtBjsLYaYZQsoafauxS5BXjWw/assertion", "http://www.w3.org/ns/prov#wasAttributedTo": [ { "@id": "https://orcid.org/0000-0002-1784-2920" } ] } ] }, { "@id": "https://w3id.org/sciencelive/np/RAyA6pt4EhMD7hZBXAwLJtBjsLYaYZQsoafauxS5BXjWw/pubinfo", "@graph": [ { "@id": "https://orcid.org/0000-0002-1784-2920", "http://xmlns.com/foaf/0.1/name": [ { "@value": "Anne Fouilloux" } ] }, { "@id": "https://w3id.org/sciencelive/np/RAyA6pt4EhMD7hZBXAwLJtBjsLYaYZQsoafauxS5BXjWw", "http://purl.org/dc/terms/created": [ { "@value": "2026-06-21T14:12:06.730Z", "@type": "http://www.w3.org/2001/XMLSchema#dateTime" } ], "http://purl.org/dc/terms/creator": [ { "@id": "https://orcid.org/0000-0002-1784-2920" } ], "http://purl.org/dc/terms/license": [ { "@id": "https://creativecommons.org/licenses/by/4.0/" } ], "http://purl.org/nanopub/x/introduces": [ { "@id": "https://w3id.org/sciencelive/np/RAyA6pt4EhMD7hZBXAwLJtBjsLYaYZQsoafauxS5BXjWw/po-delta-sourceextractor-study" } ], "http://purl.org/nanopub/x/wasCreatedAt": [ { "@id": "https://platform.sciencelive4all.org" } ], "http://www.w3.org/2000/01/rdf-schema#label": [ { "@value": "Astronomy Source Extractor applied to satellite night lights over the Po Delta" } ], "https://w3id.org/np/o/ntemplate/wasCreatedFromTemplate": [ { "@id": "https://w3id.org/np/RAuLEjPp-4dTvPwMkfHggTto1CgjIftiGRAgHlyeEonjQ" } ] }, { "@id": "https://w3id.org/sciencelive/np/RAyA6pt4EhMD7hZBXAwLJtBjsLYaYZQsoafauxS5BXjWw/sig", "http://purl.org/nanopub/x/hasAlgorithm": [ { "@value": "RSA" } ], "http://purl.org/nanopub/x/hasPublicKey": [ { "@value": "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" } ], "http://purl.org/nanopub/x/hasSignature": [ { "@value": "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" } ], "http://purl.org/nanopub/x/hasSignatureTarget": [ { "@id": "https://w3id.org/sciencelive/np/RAyA6pt4EhMD7hZBXAwLJtBjsLYaYZQsoafauxS5BXjWw" } ], "http://purl.org/nanopub/x/signedBy": [ { "@id": "https://orcid.org/0000-0002-1784-2920" } ] } ] } ]