{
  "prepared": "2026-09-19",
  "purpose": "Generalized neighborhood exploration; not parcel, postal-delivery or current MLS certification.",
  "districts": {
    "publisher": "DataSF / City and County of San Francisco",
    "definition_date": "August 2010",
    "catalog": "https://data.sf.gov/d/2kjj-ysvr",
    "export_mirror": "https://raw.githubusercontent.com/JimKing100/SF_Real_Estate_Live/master/data/Realtor%20Neighborhoods.geojson",
    "source_sha256": "f3542f2ec3b680485d05d3a0d08e8c8b04930fce7114a0d3824876f308778a5e",
    "note": "Public DataSF export preserved by the cited project. Primary DataSF download returned HTTP 503 during preparation."
  },
  "zip_codes": {
    "publisher": "DataSF / City and County of San Francisco",
    "catalog": "https://data.sf.gov/d/uq3t-6t53",
    "export_mirror": "https://raw.githubusercontent.com/luke-drury/Final-Report-SF-Rent-Trends/main/sf_zip_codes%20(2).geojson",
    "export_record_timestamp": "2023-10-27",
    "source_sha256": "9be834d82335fbe86faa15bf1bf398e1b07338e1b915f9b9e505e17edd465391",
    "source_features": 32,
    "unique_zip_areas": 27
  },
  "transformations": [
    "Project WGS84 to UTM 10N (EPSG:26910).",
    "Dissolve ZIP multipart features by ZIP; group Realtor neighborhoods by their source district.",
    "Simplify by 4 metres, preserving topology.",
    "Rank ZIP-to-district relationships by measured overlap; retain overlap of at least 1.5 percent of ZIP area.",
    "Presidio is unassigned in the district source; ZIP 94129 explicitly opens adjacent district guides 1 and 7.",
    "Add Treasure / Yerba Buena Island ZIP footprint to District 9, consistent with SFAR 9T guidance."
  ],
  "islands_reference": "https://sfar.freshdesk.com/support/solutions/articles/69000809183-interactive-map-area-layers-for-east-bay"
}