Sources & Data Layers Every layer in districtry New York City, and exactly where its data comes from.

← Back to the map 🧩 What data is missing?

This app is a reader over other people's data. It draws no boundary of its own and names no officeholder it cannot cite, so the useful question about any answer it gives is who published this, and when. That is what this page is for: the publishers the app credits as a whole, then one row per layer naming the source behind that layer specifically.

Not for legal or official use. Boundary and roster data come from public sources that explicitly disclaim legal precision. Always confirm district assignments and officeholders with the relevant government office before relying on them for anything official.

Data last verified: July 18, 2026

Where a source publishes nothing, the app says so rather than guessing — the missing-data panel on the map is the standing list of what nobody publishes yet, and what would close each gap.

Who publishes the data

The upstream publishers this app depends on, across all layers. Per-layer provenance is in the matrix below.

The layer matrix

27 layers — 11 political and legislative, 5 public safety, 6 schools, 5 geography and amenities. Each row names the publisher the boundary comes from, where the names on the card come from, and the ground the layer actually answers on — outside that ground the layer hides itself rather than guessing.

Political & legislative 11 layers

Districts that elect somebody — from your ward to your seat in Congress.

LayerWhat it answersBoundary sourceWho it namesWhere it applies
NY Supreme Court Judicial Districtjudicial-district Which New York Supreme Court judicial district covers this address. No roster is joined; the card links the court system rather than naming justices from an unverifiable list. New York City.
Borough Presidentborough-president Which Borough President's office covers this address. Borough Presidents ship with the app from the city's own directory. New York City.
District Attorneydistrict-attorney Which District Attorney's office covers this address. District Attorneys ship with the app from the city's own directory. New York City.
U.S. House Districtcongress Which U.S. House district covers this address, and who represents it. Members come from the unitedstates/congress-legislators dataset, refreshed weekly and reviewed before it ships. New York City.
Civil Court (Municipal Court) Districtmunicipal-court Which Civil (Municipal) Court district covers this address. No roster is joined; the card links the court rather than naming judges. New York City.
NY State Senate Districtstate-senate Which New York State Senate district covers this address, and who holds the seat. Senators come from the NY Senate's Open Legislation API, refreshed weekly and reviewed before they ship; district offices are enriched from OpenStates where it publishes them. New York City.
City Council Districtcouncil Which City Council district covers this address, and who represents it. Council Members are re-scraped weekly from council.nyc.gov's own district directory and reviewed before they ship. New York City.
Community District / Boardcommunity-district Which community district covers this address, and which community board advises on it. Board contact details come from the city's own community board dataset; individual members are not named. New York City.
Election Districtelection-district Which election district this address votes in. No roster: an election district has no officeholder. New York City.
NY State Assembly Districtstate-assembly Which New York State Assembly district covers this address, and who holds the seat. Assemblymembers come from the NY Senate's Open Legislation API, refreshed weekly and reviewed before they ship. New York City.
Early Voting Siteearly-voting The nearest early-voting sites to this point for the current election. No roster: a voting site has no officeholder. Hours change per election — confirm with the Board of Elections. New York City.

Public safety 5 layers

Who answers a call at this address, and where they answer it from.

LayerWhat it answersBoundary sourceWho it namesWhere it applies
FDNY Battalionfire-battalion Which FDNY battalion covers this address. No roster is joined; a battalion has no single officeholder to name. New York City.
NYPD Sectorpolice-sector Which NYPD sector — the patrol area inside a precinct — covers this address. No roster is joined; a sector has no separate commander to name. New York City.
NYPD Precinctpolice-precinct Which NYPD precinct covers this address, and who commands it. Commanding officers are re-scraped weekly from the NYPD's own precinct pages. Where the NYPD publishes no commander the card says so rather than guessing — about four of the 78 at any time. New York City.
Police Stationpolice-station The nearest police stations to this point, by straight-line distance. No roster is joined; the card gives the station and its address. New York City.
Firehousefire-station The nearest firehouses to this point, by straight-line distance. No roster is joined. The city's firehouse dataset carries no phone number, which is a gap at the source rather than something the card withholds. New York City.

Schools 6 layers

The district, the attendance zone, and the schools nearest the point.

LayerWhat it answersBoundary sourceWho it namesWhere it applies
Community School Districtschool-district Which community school district this address is in. Superintendents are appointed rather than elected; the card links the district rather than naming one from an unverifiable list. New York City.
Community Education Councilcec Which Community Education Council serves this address. No roster ships. No CEC membership list is published in a form this app can verify, so the card links the council rather than naming people it cannot check. New York City.
High School Zonehs-zone Which zoned high school serves this address, where one does. No roster; most NYC high schools admit by application citywide rather than by zone, and the card says so where no zone applies. New York City.
Middle School Zonems-zone Which zoned middle school serves this address, where one does. No roster; the card links MySchools, which is what decides a placement. New York City.
Elementary School Zonees-zone Which zoned elementary school serves this address. No roster; the card links MySchools, which is what decides a placement. New York City.
Schoolschool-site The nearest school sites to this point, by straight-line distance. No roster is joined; the card names the school and its address. New York City.

Geography & amenities 5 layers

The boundaries that place an address without electing anyone, plus the nearest public services.

LayerWhat it answersBoundary sourceWho it namesWhere it applies
Borough / Countyborough Which borough — and therefore which county — this address is in. Borough-wide officeholders ship with the app and are surfaced on the Borough President and District Attorney cards rather than here. New York City.
ZIP Code (MODZCTA)zip-code Which Modified ZIP Code Tabulation Area contains this address. No roster: a ZIP code has no officeholder. New York City.
Neighborhood (NTA)neighborhood Which Neighborhood Tabulation Area contains this address. No roster: an NTA is a statistical area, and its name is not always the one a listing or a local would use. New York City.
Post Officepost-office The nearest post offices to this point, by straight-line distance. No roster is joined; the card names the facility and its address. New York City.
Librarylibrary The nearest public libraries to this point, by straight-line distance. No roster is joined. The dataset carries no phone number, which is a gap at the source rather than something the card withholds. New York City.