Louisiana sources & data layers

Every layer in districtry Louisiana, 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: October 20, 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.

This page says where each answer comes from today.

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

12 layers — 5 political and legislative, 2 public safety, 1 schools, 4 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 5 layers

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

LayerWhat it answersBoundary sourceWho it namesWhere it applies
U.S. Houseus-house The U.S. House district covering the point, and the representative holding it. congress-roster.json, rebuilt weekly by CI from the public-domain unitedstates/congress-legislators dataset — including each member's district office and Washington office. Louisiana — statewide, all 6 districts.
Louisiana Senate Districtla-senate The Louisiana Senate district covering the point, and the senator holding it. la-senate-members.json, rebuilt weekly by CI from the Louisiana Senate's own list of senators and each senator's own page: the name as the senator's page writes it, the party, the district office's address and telephone, and the e-mail address the list prints. The list shows a vacant seat as a card reading Vacant, and the card says so: Senate District 14 on 2026-10-20. The pages also name a legislative assistant and a fax number, and neither is read. Louisiana — statewide, all 39 districts. A point on the open water of Lake Pontchartrain is in no Senate district on the Census's map, and the card says so.
Louisiana House Districtla-house The Louisiana House district covering the point, and the representative holding it. la-house-members.json, rebuilt weekly by CI from the Louisiana House's own list of representatives and each representative's own page, on the same terms as the Senate roster; House Districts 77 and 92 read vacant on 2026-10-20. Louisiana — statewide, all 105 districts.
Police Jury or Council Districtparish-district Which member of the parish's police jury, council or commission represents the point, in the parishes where this app has confirmed the current district lines. The layer is hidden in the other parishes, where the Parish card still names every member. la-parish-officials.json, the roster the Parish card reads: the member elected from each district, from the Louisiana Secretary of State's list of elected officials, joined by district number. 6 of Louisiana's 64 parishes; hidden in the other 58, which the Data gaps panel lists and explains.
Tribal Governmenttribal-government Whether this address is on tribal land, and which nation's government answers for it — Louisiana has 6 such areas, held by the Chitimacha Tribe of Louisiana, the Coushatta Tribe of Louisiana, the Jena Band of Choctaw Indians and the Tunica-Biloxi Indian Tribe. Each nation's council from that nation's own page, read weekly by scripts/tribal_council_scraper.py and dated on the card: the Chitimacha Tribal Council's five members (chitimacha.gov), the Jena Band's Tribal Chief and four council members (jenachoctaw.org) and the Tunica-Biloxi Tribal Council's seven members (tunicabiloxi.org). The Coushatta Tribe's own site names its chairman and not the other four members, so its card names nobody and says why. The government, its seat and its website come from the Bureau of Indian Affairs' tribal leaders directory (data/bia-tribal-governments.json); the land is joined to the government by this project's own data/tribal-government-join.json. Louisiana — the six pieces of land above, in Allen, Avoyelles, Calcasieu, Grant, Jefferson Davis, LaSalle, Natchitoches and St. Mary parishes. Every other point in the state is on no tribal land the Census draws for a government.

Public safety 2 layers

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

LayerWhat it answersBoundary sourceWho it namesWhere it applies
Police Stationpolice-station The three nearest police stations to the point, by straight-line distance, with each one's address. NO OFFICEHOLDER, AND NONE IS MISSING: a police station is a facility, not an elected district. Nobody is elected from one. Louisiana — plus the border strip its envelope necessarily includes. A BUILDING, NOT A JURISDICTION: which agency answers at a given point is a service-area question this instance has not been researched for, so the card says where the nearest are and never who serves you. Nearest-three is a proximity fact, so for a reader near the state line the nearest one really may be in a neighbouring state, and the card's intro says these are straight-line distances.
Fire & EMS Stationfire-station The three nearest fire and EMS stations to the point, by straight-line distance, with each one's address. NO OFFICEHOLDER, AND NONE IS MISSING: a fire and EMS station is a facility, not an elected district. Nobody is elected from one. Louisiana — plus the border strip its envelope necessarily includes. A BUILDING, NOT A JURISDICTION: which agency answers at a given point is a service-area question this instance has not been researched for, so the card says where the nearest are and never who serves you. Nearest-three is a proximity fact, so for a reader near the state line the nearest one really may be in a neighbouring state, and the card's intro says these are straight-line distances.

Schools 1 layer

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

LayerWhat it answersBoundary sourceWho it namesWhere it applies
School Districtschool-district-unified The public school district covering the point. la-school-board-members.json, rebuilt weekly from the Louisiana Secretary of State's list of elected officials: every member of the 69 school boards by seat, the 64 parish boards and the five city systems' (Baker, Bogalusa, Central, Monroe and Zachary), 639 members on 2026-10-20. A member's own telephone ships where the list prints it for that member alone, and an address only as the board's office, where at least three of its members print the same one and no official outside the board does. The map does not draw school board districts, so the card lists the whole board and does not say which member represents the point (gap la-school-board-district-lines). 610 of the 639 terms end on December 31, 2026. The list also records each member's race and gender, and neither is read. Louisiana — statewide. The label carries no qualifier because there is nothing to distinguish it from: the elementary and secondary tilings TIGERweb serves for other states are EMPTY in Louisiana (0 features each, measured 2026-10-20), and the 69 unified districts' Census land area sums to exactly the 64-parish total (111,943 km2).

Geography & amenities 4 layers

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

LayerWhat it answersBoundary sourceWho it namesWhere it applies
Parishcounty Which parish contains the point, and the members of its police jury, council or commission, with its parish president or mayor where the parish elects one. la-parish-officials.json, rebuilt weekly: every member of each parish's governing body — 38 police juries, 25 parish councils and Caddo's parish commission — by district, the at-large members of the seven councils that elect some, and the parish president, mayor-president or mayor of the 25 council parishes, from the Louisiana Secretary of State's list of elected officials (573 members on 2026-10-20). An official's own telephone ships where the list prints it for that official alone. A telephone printed for three or more of a body's members is the body's office telephone, and an address ships only as a body's office, where at least three members print the same one, because some officials' addresses are homes. The list also records each official's race and gender, and neither is read. Louisiana — statewide, all 64 parishes.
ZIP Codezip-code The ZIP Code Tabulation Area covering the point — the Census Bureau's areal approximation of the USPS delivery routes sharing a ZIP code, not a postal boundary. NO OFFICEHOLDER, AND NONE IS MISSING: a ZIP code is a mail-routing convenience, not a unit of government, so nobody is elected from one. The card says what the boundary actually is rather than leaving a reader to assume it means more. Louisiana. The layer is hidden outside the state outline, because outside it the Census's point query answers with a neighbouring state's real ZIP code (Orange, Texas gives 77630 and Vicksburg, Mississippi 39183, measured 2026-10-20).
City, Town or Villagemunicipality The city, town or village containing the point, if any. la-municipal-officials.json, rebuilt weekly from the Louisiana Secretary of State's list of elected officials: the mayor, the council members, aldermen, selectmen or trustees (the list's own words) by seat where the list gives one, and the chief of police, marshal or city prosecutor, of 302 municipalities on 2026-10-20 (298 mayors, 1,308 members and 191 police officers). Every place the Census draws has a record except New Orleans, whose mayor and council the Parish card names as Orleans Parish's government, Baton Rouge, whose government is East Baton Rouge Parish's, and Houma, which has none of its own. An official's own telephone ships where the list prints it for that official alone, and an address only as the town's office, where at least three of its officials print the same one and no official outside the town does. The map does not draw any town's wards or districts, so the card does not say which member represents the point (gap la-municipal-ward-lines). The list also records each official's race and gender, and neither is read. Louisiana — statewide. A point outside every city, town and village is unincorporated, which the card states.
Post Officepost-office The three nearest post offices to the point, by straight-line distance, with each one's address. NO OFFICEHOLDER, AND NONE IS MISSING: a post office is a facility, not an elected district. Nobody is elected from one. Louisiana — plus the border strip its envelope necessarily includes. A BUILDING, NOT A JURISDICTION: which agency answers at a given point is a service-area question this instance has not been researched for, so the card says where the nearest are and never who serves you. Nearest-three is a proximity fact, so for a reader near the state line the nearest one really may be in a neighbouring state, and the card's intro says these are straight-line distances.