@prefix this: <https://w3id.org/sciencelive/np/RAocR3vJTYJPEfL8vIBN2cjEFie2vT-tvhOS7IA431Dqk> .
@prefix sub: <https://w3id.org/sciencelive/np/RAocR3vJTYJPEfL8vIBN2cjEFie2vT-tvhOS7IA431Dqk/> .
@prefix np: <http://www.nanopub.org/nschema#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix prov: <http://www.w3.org/ns/prov#> .
@prefix npx: <http://purl.org/nanopub/x/> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://w3id.org/sciencelive/np/RAocR3vJTYJPEfL8vIBN2cjEFie2vT-tvhOS7IA431Dqk> a
    np:Nanopublication, npx:ExampleNanopub;
  np:hasAssertion sub:assertion;
  np:hasProvenance sub:provenance;
  np:hasPublicationInfo sub:pubinfo;
  dc:created "2026-04-09T20:56:50.129Z"^^xsd:dateTime;
  dc:creator <https://orcid.org/0000-0002-1784-2920>;
  dc:license <https://creativecommons.org/licenses/by/4.0/>;
  npx:introduces sub:healpix-replication2;
  npx:wasCreatedAt <https://platform.sciencelive4all.org>;
  <http://www.w3.org/2000/01/rdf-schema#label> "NP created using Declaring a replication study design according to FORRT";
  <https://w3id.org/np/o/ntemplate/wasCreatedFromTemplate> <https://w3id.org/np/RAuLEjPp-4dTvPwMkfHggTto1CgjIftiGRAgHlyeEonjQ> .

sub:healpix-replication2 a <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> "Analysis of Sphere vs WGS84 Ellipsoid Impact on HEALPix Cell Assignment";
  <http://www.w3.org/2004/02/skos/core#related> <http://www.wikidata.org/entity/Q117479905>,
    <http://www.wikidata.org/entity/Q11902211>, <http://www.wikidata.org/entity/Q5629401>;
  <https://w3id.org/sciencelive/o/terms/hasDeviationDescription> """  - The original paper uses H3 (sphere-only) and does not consider ellipsoid effects -- this is a novel extension
  - Analysis uses synthetic raster grids, not real Sentinel/Copernicus data                                                                       
  - Four latitude bands chosen to represent typical European EO coverage""";
  <https://w3id.org/sciencelive/o/terms/hasDiscipline> <http://www.wikidata.org/entity/Q8008>;
  <https://w3id.org/sciencelive/o/terms/hasMethodologyDescription> "For each region, a 50x50 pixel raster grid is indexed to HEALPix depth 9 cells twice -- once with ellipsoid='sphere' and once with ellipsoid='WGS84' -- using healpix_geo.nested.lonlat_to_healpix(). Cell assignment differences are quantified as percentage of pixels in a different cell. Polygon coverage similarity is measured via Jaccard index using healpix_geo.nested.polygon_coverage(). Environment: Python 3.11, healpix-geo 0.1.1, Docker containerized, seeded RNG (seed=42).";
  <https://w3id.org/sciencelive/o/terms/hasScopeDescription> "Extends the replication of Law & Ardo (2024) by comparing HEALPix cell assignments using sphere-based vs WGS84 ellipsoid-based indexing via healpix-geo. Measures the percentage of raster pixels assigned to different cells depending on the reference surface, across four latitude bands: equatorial (0°), mid-latitude (+48°), high-latitude (+62°), and arctic (+78°).";
  <https://w3id.org/sciencelive/o/terms/targetsClaim> <https://w3id.org/sciencelive/np/RAmj7Y0tsAGet0jI0cUP-H5o2vbafrLSZ-6xG5l-pH_C4/healpix-claim2> .

sub:assertion prov:wasAttributedTo <https://orcid.org/0000-0002-1784-2920> .

<https://orcid.org/0000-0002-1784-2920> <http://xmlns.com/foaf/0.1/name> " Anne Fouilloux" .

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