Portolan Reference Catalog

A mixed reference catalog exercising every major case in the Portolan v0.1 specification with real, openly licensed data pulled from its original upstream sources, vector polygons and points, raster, tabular, mirror provenance, nested catalogs and flat collections.

Collections, 8. Nested Catalogs, 5. Licenses, BSD-3-Clause, CC-BY-4.0, CC0-1.0, PDDL-1.0. Provenance, 8 mirror Collections.

Upstream sources.

• Natural Earth Countries (1:110m), https://naciscdn.org/naturalearth/110m/cultural/ne_110m_admin_0_countries.zip
• Natural Earth Populated Places (1:50m), https://naciscdn.org/naturalearth/50m/cultural/ne_50m_populated_places.zip
• United States Counties (2023, 1:500k), https://www2.census.gov/geo/tiger/GENZ2023/shp/cb_2023_us_county_500k.zip
• Boston Open Space, https://opendata.arcgis.com/api/v3/datasets/2868d370c55d4d458d4ae2224ef8cddd_7/downloads/data?format=shp&spatialRefId=4326
• Netherlands Provinces, https://service.pdok.nl/kadaster/brk-bestuurlijke-gebieden/atom/downloads/BestuurlijkeGebieden_2026.gpkg
• San Francisco Addresses (EAS), https://data.sfgov.org/resource/ramy-di5m.geojson?$limit=5000&$order=:id
• Sample Raster COG, https://raw.githubusercontent.com/rasterio/rasterio/main/tests/data/RGB.byte.tif
• Eurostat Electricity Prices for Household Consumers, https://ec.europa.eu/eurostat/api/dissemination/sdmx/2.1/data/nrg_pc_204/?format=SDMX-CSV&compressed=false