{"retrieved":"2026-10-13","pleiades":{"url":"https://atlantides.org/downloads/pleiades/gis/pleiades_gis_data.zip","license":"CC BY 3.0","records":23377,"attribution":"Pleiades contributors, Ancient World Mapping Center and Institute for the Study of the Ancient World","processing":"Point locations with both dating bounds; original coordinates, date bounds and uncertainty retained. Multiple candidate locations are retained."},"cshapes":{"url":"https://icr.ethz.ch/data/cshapes/CShapes-2.0.geojson","license":"CC BY-NC-SA 4.0","attribution":"Schvitz, Rüegger, Girardin, Cederman, Weidmann and Gleditsch (2022)","records":710,"processing":"Original geometries retained. Frontend selects intervals using integer day/month/year fields for January 1 of each chosen year."},"update_2026_10_14":{"sources":["Natural Earth 1:50m physical geography (modern)","AtlasPI: 649 historical events and enrichment; secondary compilation","Stanford Building the New Order: 81 administrative transfers, 1938–1945","Metropolitan Museum of Art Open Access: 89 illustrated objects","Wikidata/Wikimedia Commons: 12 images with per-image attribution","Our World in Data: 269 population series; HadCRUT5 temperature 1850–2025 relative to 1861–1890; FAO forests 1990–2025; HYDE land use 10000 BCE–2025","Literature: initial five-author sample with dates and sources"],"limitations":["Not all countries, cities, years or wars covered","Automatic Cyrillic transcription for names absent from Russian dictionary","War polygons represent administrative transfers, not exact fronts","Museums examples have their own dates and do not represent everyone in a country"],"fixes":["Antarctica name read from ABBREVN; no statehood implied","Alaska and Hawaii geographic labels persist after merger into USA geometry"]},"review_2026_10_14":{"added_events":12,"added_museum_images":11,"removed_misclassified_images":[264950,264949],"removed_claim":"Wikidata Q8680 population 680000000 in 1922: insufficient verification; not replaced with guessed figure","translated_early_event_headings":40,"notes":"Translations of headings follow catalog descriptions; not independent validation of all underlying historical claims."},"science_expansion":{"stars":"HYG v4.1, magnitude <=6, 5070 entries; CC BY-SA 4.0. Linear motion and Astronomy Engine precession/nutation.","astronomy":"Astronomy Engine MIT; working visualization window -2000 to 3000 (historical years), no uniform precision guarantee.","modernCities":"Natural Earth 10m v5.1.2, 7342 contemporary reference locations, public domain. Not evidence of historical settlement.","cityReview":"25 sourced city intervals; founding and continued indigenous presence distinguished.","temperature":"NASA GISTEMP v4 monthly global land-ocean anomalies, 1951–1980 baseline, downloaded 2026-10-14, 1761 values through September 2026.","missions":"16 selected NASA/ESA mission launches; no orbital trajectories.","volcanoes":"9 selected eruptions; points represent volcano locations, not footprints.","philosophy":"4 introductory biographies sourced to Stanford Encyclopedia of Philosophy."}}