@prefix this: <https://w3id.org/sciencelive/np/RAQv81flnEBHM1kunkUavJgGtU3zWB-ZhTW7F5CfYE5OA> .
@prefix sub: <https://w3id.org/sciencelive/np/RAQv81flnEBHM1kunkUavJgGtU3zWB-ZhTW7F5CfYE5OA/> .
@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/RAQv81flnEBHM1kunkUavJgGtU3zWB-ZhTW7F5CfYE5OA> a
    np:Nanopublication, npx:ExampleNanopub;
  np:hasAssertion sub:assertion;
  np:hasProvenance sub:provenance;
  np:hasPublicationInfo sub:pubinfo;
  dc:created "2026-04-09T20:38:45.956Z"^^xsd:dateTime;
  dc:creator <https://orcid.org/0000-0002-1784-2920>;
  dc:license <https://creativecommons.org/licenses/by/4.0/>;
  npx:introduces sub:healpix-replication;
  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-replication 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> "Replication of DGGS Benchmark Using HEALPix-geo with Sphere and WGS84 Ellipsoid";
  <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> """  - Uses HEALPix (healpix-geo) instead of H3 -- this is the replication variable
  - Tests both sphere and WGS84 ellipsoid (extension beyond original)                                                                             
  - Default testing up to 50 vector layers and 500 raster layers     
  - Comparison against H3 uses pre-computed reference results from the companion H3 replication study (DOI: 10.5281/zenodo.18904498) """;
  <https://w3id.org/sciencelive/o/terms/hasDiscipline> <http://www.wikidata.org/entity/Q8008>;
  <https://w3id.org/sciencelive/o/terms/hasMethodologyDescription> "Implements polygon polyfill via healpix_geo.nested.polygon_coverage() and raster indexing via healpix_geo.nested.lonlat_to_healpix() at HEALPix depth 9 (~1 km² cells, matching H3 resolution 9). Vector benchmark: Voronoi polygons, dissolve by value, polyfill to HEALPix cells, join on cell ID, 7-bit classification. Raster benchmark: Gaussian-smoothed layers, pre-indexed pixel-to-cell mapping, aggregate and classify. Ellipsoid analysis: compares sphere vs WGS84 cell assignments across equatorial (0°), Mediterranean (+48°), Scandinavian (+62°), and Arctic (+78°) regions. Environment: Python 3.11, healpix-geo 0.1.1, Docker containerized, seeded RNG (seed=42).";
  <https://w3id.org/sciencelive/o/terms/hasScopeDescription> "Replicates both vector and raster benchmarks from Law & Ardo (2024) using HEALPix indexing via the healpix-geo library (Rust-based) instead of H3. Extends the analysis with a geodetic comparison: all benchmarks are run twice -- once with sphere-based indexing, once with WGS84 ellipsoid indexing -- across four latitude bands (equatorial, mid-latitude, high-latitude, arctic). ";
  <https://w3id.org/sciencelive/o/terms/targetsClaim> <https://w3id.org/sciencelive/np/RA2Qg0145YOVlnrZFqXjaqXw5oewbhfgf8vL8bX5RFf8o/healpix-forrt-1> .

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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