Historical AIS vessel-density grid (US, months-lagged analytics)
Coarse vessel-density grid folded from NOAA MarineCadastre daily AIS files. Historical analytics, months-lagged - NOT live and NOT a current snapshot. Coverage is United States historical analytics. Each grid cell carries a vessel observation count and an AIS ship-type breakdown. Optional bbox filters cells; optional date reads a specific day's shard (defaults to the latest folded day). Source: NOAA / BOEM MarineCadastre (public domain, CC0).
Query parameters
Bounding box 'minLon,minLat,maxLon,maxLat' to filter grid cells.
Bounding box 'minLon,minLat,maxLon,maxLat' to filter grid cells.
ISO date YYYY-MM-DD; defaults to the latest folded day.
ISO date YYYY-MM-DD; defaults to the latest folded day.
Response
Coarse historical vessel-density grid with CC0 attribution and a months-lagged honesty note.
Example response
{
"meta": {
"endpoint": "/api/v1/fred/us/cpi",
"data_time": "2026-04-16T14:30:00Z",
"response_time": "2026-04-16T14:30:12Z",
"provider": "Sugra API v1.0.1",
"source": "sugra_crypto",
"attribution": "Short interest and Reg SHO daily short volume data is owned by and sourced from FINRA (Financial Industry Regulatory Authority).",
"fallback_chain": [
"sugra_crypto",
"sugra_finance"
]
}
}