Licences and attribution

Everything this map shows comes from somewhere, and every one of those places has terms. This page lists all of them: what each source provides, the licence it is under, and the credit that licence requires. Back to the map.

Open data, and the copy you are owed

The map is built from OpenStreetMap, which is published under the Open Database License (ODbL) 1.0. Some of what you see is not raw OpenStreetMap: this server builds derived tables from it, joining, classifying and matching features into a searchable catalogue. Under ODbL section 4.6, publicly using a work made from a derived database obliges us to offer you either that database or a machine-readable description of every alteration we made to get there.

The alterations bundle is that description: the SQL and the scripts that turn the OpenStreetMap planet into the derived tables this map queries, exactly as they run on this server. It is free, needs no account, and these two links are the whole of it.

alterations.tar.gz · MANIFEST.txt, which records the bundle's SHA-256, every file inside it with its own SHA-256, and the columns of each derived table as they stand on this server

The derived tables it describes:

table	what it is
`enrichment.pois`	Places from sources outside OpenStreetMap, shaped like OSM features so they can sit beside them.
`enrichment.osm_links`	The matches between those places and the OpenStreetMap features they are the same thing as.
`public.poi_catalog`	Every point of interest the map can search, classified into the vocabulary and indexed for lookup.
`public.region_places`	The cities, landmarks and boundaries a region search answers with.
`events.venues`	The places events happen at, including the ones Paris publishes under the ODbL, which is why this table is here from 2026-10-02 and was not before.
`events.events`	What is on at those places and when, from the same sources.

Those derived tables are themselves offered under the Open Database License, as ODbL section 4.4 requires. We are not obliged to hand out a copy of the OpenStreetMap database or of the tile archive built from it, and we do not: section 4.6 is satisfied by the method of alteration, which is what the bundle contains.

Every source, and what it requires

OpenStreetMap

Provides: The map itself: every road, building, boundary, waterway and place, and the base of every POI the search and the cards return.
Licence: Open Database License (ODbL) 1.0
Source: https://www.openstreetmap.org/copyright
Credit required: © OpenStreetMap contributors
Shown: the map's attribution control, on every view
Share-alike: Yes. Derived data is offered under the same licence; see the bundle.

OpenStreetMap's own copyright page states the two obligations: "Provide credit to OpenStreetMap by displaying our attribution notice" and "Make clear that the data is available under the Open Database License", and accepts a link to that page as the way to do the second.

OpenMapTiles schema

Provides: The layer and attribute scheme of the vector tiles. The tiles themselves are built on this box by planetiler from the OpenStreetMap planet; no tile is downloaded from anyone.
Licence: CC BY 4.0 (the schema)
Source: https://openmaptiles.org/
Credit required: © OpenMapTiles
Shown: the map's attribution control, on every view

The tile server's own TileJSON carries this credit beside OpenStreetMap's; the viewer sets its attribution itself, so the credit is set there too rather than inherited.

Natural Earth

Provides: The landcover under the map at low zoom: green where things grow, sand where they do not, for the zooms z0 to z7 where the vector tiles carry no vegetation at all. Derived by bin/build-landcover.py from the NE2 raster by classifying its colours; the classes are the cartographer's judgement of where the world's biomes are, not a measurement of the ground.
Licence: Public domain
Source: https://naciscdn.org/naturalearth/50m/raster/NE2_50M_SR_W.zip
Credit required: Natural Earth
Shown: the map's attribution control, on every view

Natural Earth asks for nothing: "No permission is needed to use Natural Earth. Crediting the authors is unnecessary." The credit is shown anyway, because a visitor looking at a green continent should be able to find out where the green came from -- and because what we did to it (reducing a painted raster to two classes) is the kind of alteration worth naming.

OSM Liberty basemap style

Provides: The Liberty cartography, which is the map's default look.
Licence: BSD 3-Clause (code) and CC BY 4.0 (design)
Source: https://github.com/openmaptiles/osm-liberty-gl-style
Credit required: None required by the licence.
Shown: licence page only

Vendored, with the upstream URL and its SHA-256 recorded in the style document's own metadata. Derived from maputnik/osm-liberty, itself from Mapbox Open Styles. The cartography only: the style's four POI layers and its Maki sprite sheet were removed, and the ten marks it still needs (the one-way arrow, the place dots, the road-shield plates) are drawn for this map.

Nominatim

Provides: The search box's address and place lookup, and the reverse geocoding a dropped pin uses. Run on this box against its own copy of the data.
Licence: GPL 2.0 (the software); ODbL 1.0 (the data, which is OpenStreetMap)
Source: https://nominatim.org/
Credit required: © OpenStreetMap contributors
Shown: the map's attribution control, through the OpenStreetMap credit
Share-alike: Yes. Derived data is offered under the same licence; see the bundle.

Nominatim adds no data of its own. Its results are OpenStreetMap's, and they carry OpenStreetMap's licence.

Valhalla

Provides: Directions and the "within reach" travel-time areas.
Licence: MIT (the software); ODbL 1.0 (the routing graph, from OpenStreetMap)
Source: https://valhalla.github.io/valhalla/
Credit required: © OpenStreetMap contributors
Shown: the map's attribution control, through the OpenStreetMap credit
Share-alike: Yes. Derived data is offered under the same licence; see the bundle.

Terrain Tiles (AWS Open Data)

Provides: The elevation model behind hillshade relief and 3D terrain.
Licence: Per contributing dataset; see the attribution list
Source: https://registry.opendata.aws/terrain-tiles/
Credit required: ArcticDEM terrain data DEM(s) were created from DigitalGlobe, Inc., imagery and funded under National Science Foundation awards 1043681, 1559691, and 1542736; Australia terrain data © Commonwealth of Australia (Geoscience Australia) 2017; Austria terrain data © offene Daten Österreichs – Digitales Geländemodell (DGM) Österreich; Canada terrain data contains information licensed under the Open Government Licence – Canada; Europe terrain data produced using Copernicus data and information funded by the European Union – EU-DEM layers; Global ETOPO1 terrain data U.S. National Oceanic and Atmospheric Administration; Mexico terrain data source: INEGI, Continental relief, 2016; New Zealand terrain data Copyright 2011 Crown copyright (c) Land Information New Zealand and the New Zealand Government (All rights reserved); Norway terrain data © Kartverket; United Kingdom terrain data © Environment Agency copyright and/or database right 2015. All rights reserved; United States 3DEP (formerly NED) and global GMTED2010 and SRTM terrain data courtesy of the U.S. Geological Survey.
Shown: the map's attribution control while the terrain or hillshade layer is on, and here in full

The upstream documentation is explicit that this is not one licence: "Attribution is required for many terrain tile data providers ... you are responsible for researching each project to follow their license terms." The list above is the required block it publishes.

OurAirports

Provides: Airports, their codes and their runways.
Licence: Public domain
Source: https://ourairports.com/data/
Credit required: OurAirports
Shown: the place card, on an airport

"All data is released to the Public Domain, and comes with no guarantee of accuracy or fitness for use." Credit is appreciated by the project and not required, so it is given.

Wikidata

Provides: Identifiers that tie a place to its article and its photograph, and the seed list behind the festivals layer.
Licence: CC0 1.0 for the data namespaces
Source: https://www.wikidata.org/
Credit required: Wikidata
Shown: the place card, where an identifier is used

"data ... in the main, property and lexeme namespaces is made available under the Creative Commons CC0 License (Public domain); text in other namespaces is made available under the Creative Commons Attribution-ShareAlike 4.0 License". Only the data namespaces are used.

National Park Service

Provides: The event calendar of 474 United States national park units: ranger programmes, walks and talks, with their dates and the park they are at, stored for the next year.
Licence: Public domain (a work of the United States government)
Source: https://developer.nps.gov/
Credit required: National Park Service
Shown: the place card of a park that has programmes in the window, and the events chips on the map while one is live

THEIR OWN WORDS, from the disclaimer above: "material created by the National Park Service and presented on this website, unless otherwise indicated, is generally considered in the public domain". So nothing is owed, and the credit is given because a reader deserves to know whose calendar they are reading. The same page says a reference to a commercial product "does not constitute endorsement", which cuts the other way and is worth repeating here: nothing on this map is endorsed by the park service. NO IMAGES ARE TAKEN. The API offers one per event and "unless otherwise indicated" is exactly the caveat that would cover a photographer's copyright, so the importer reads the dates, the title and the park and leaves the pictures alone.

Bologna Agenda Cultura

Provides: The city of Bologna's cultural agenda: concerts, exhibitions, markets and festivals, with the address the city publishes, its coordinates and every date of a recurring one.
Licence: CC BY 4.0
Source: https://opendata.comune.bologna.it/explore/dataset/eventi-bologna-agenda-cultura/
Credit required: Comune di Bologna
Shown: the place card of an address with something on in the window, and the events chips on the map while one is live

THE DATASET'S OWN METADATA, read 2026-10-03: license "CC BY 4.0", license_url creativecommons.org/licenses/by/4.0/, publisher "Comune di Bologna", 31,363 records, modified that morning. Attribution is the whole obligation, so unlike the Paris agenda this one does NOT put anything into the ODbL derivative. HOW IT WAS FOUND IS THE POINT. Not by looking for Bologna: by asking data.opendatasoft.com, the federation's own catalogue, for every event dataset on every portal running that software. One query, 154 datasets, and this is the largest live municipal one. core/documentation/decisions/maps/events-goal.md says to search platforms rather than cities and this is the first source that came from doing it. NO IMAGES ARE TAKEN, as with every other events source here: the importer reads the dates, the title, the address and the point.

Que Faire a Paris

Provides: The city of Paris's own agenda of what is on: concerts, exhibitions, walks, workshops and festivals, with the venue, the coordinates the city publishes and every sitting of a recurring one.
Licence: Open Database License (ODbL)
Source: https://opendata.paris.fr/explore/dataset/que-faire-a-paris-/
Credit required: Ville de Paris, Direction de la Communication
Shown: the place card of a venue with something on in the window, and the events chips on the map while one is live
Share-alike: Yes. Derived data is offered under the same licence; see the bundle.

THE DATASET'S OWN METADATA, read 2026-10-02: license "Open Database License (ODbL)", license_url http://opendatacommons.org/licenses/odbl/, publisher "Direction de la Communication - Ville de Paris". That is the licence this map already carries for OpenStreetMap, so the share-alike obligation is one already being met rather than a new one taken on. IT IS ALSO WHY events.venues AND events.events JOINED THE ODbL DERIVATIVE ABOVE: those tables held nothing share-alike until this source arrived, and the bundle takes its table list straight from that block, so the obligation follows the data without anyone remembering to make it. NO IMAGES ARE TAKEN. Every record offers a cover photo with its own credit line, which is a photographer's right and not the city's to pass on, so the importer reads the dates, the title, the venue and the point.

New York City permitted events

Provides: The city's own file of approved event permits: street festivals, block parties, parades, farmers markets and the rest, with the dates and the block each one closes. The point on the map is worked out here from OSM street geometry, because the file names its locations in words.
Licence: None declared by the city
Source: https://data.cityofnewyork.us/d/tvpp-9vvx
Credit required: NYC Office of Citywide Event Coordination and Management
Shown: the place card of a block that has a permit in the window, and the events chips on the map while one is live

***THIS SOURCE HAS NO GRANT TO QUOTE, AND THAT IS WHY THIS NOTE IS LONG.*** Every other source here can be pointed at a sentence that permits the use: CC0 for Wikidata, "generally considered in the public domain" for the park service, the ODbL for OpenStreetMap. Measured 2026-10-02: the dataset declares licenseId null and license null in its own metadata, and the city's DCAT catalogue at /data.json declares no licence on 2,652 of its 2,710 datasets while declaring CC-BY-4.0 on 57 and ODbL on one, so the field is used when it is meant and the silence here is deliberate or at least consistent. The only terms document the Open Data portal links from its own footer is nyc.gov's general Terms of Use, which says City content on nyc.gov is "the property of the City of New York. All rights are reserved." INCLUDED AT THE OPERATOR'S DECISION, 2026-10-02, on the ground that a permit is a public record. The attribution is given because the office that coordinates these events deserves the credit and because a reader should know whose file they are reading, not because anything compels it. If the city ever says otherwise, the row in pillar maps:events_civic is the switch: remove it and the source stops.

Wikipedia

Provides: The dates of 63 festivals, read from the editions table of each festival's article, and 6,474,737 one-line short descriptions of what a place is, read from the page_props dump and keyed by Wikidata id.
Licence: CC BY-SA 4.0 and GFDL
Source: https://en.wikipedia.org/
Credit required: Wikipedia
Shown: the event card, which names the article and links it with the date it was read; and the place card, under the title, as the one line saying what a place is
Share-alike: Yes, for the descriptions. Each one stays under CC BY-SA 4.0, so the card showing it credits Wikipedia and links these terms. The ODbL bundle below is the offer for the OpenStreetMap derivative and does not cover this text.

THIS ENTRY CHANGED WHEN THE DESCRIPTIONS ARRIVED, and the note it replaces said it would: "No Wikipedia prose is copied onto a card. If that ever changes, the card owes attribution to the article and its authors and this page owes a share-alike notice." Both are now owed and both are given. The dates are still facts from a table rather than anyone's expression; the short descriptions are prose, one line of it, written by editors to say what a subject is.

Wikimedia Commons

Provides: The photograph on a place card.
Licence: Per image; most are CC BY-SA or CC BY
Source: https://commons.wikimedia.org/
Credit required: the photographer and licence named on each image
Shown: under the photograph itself, as the author's name and the licence, linking the image's own page on Commons

Images are fetched by this server, never by the reader's browser, and cached here; the credit travels with the image and is rendered with it.

Festival organisers' own websites

Provides: The dates of 496 festivals, from the sites that run them.
Licence: Facts, published by each organiser for machine reading
Credit required: each festival, named and linked on its own card
Shown: the event card, which names the site and links it

What is stored is a name, a start date, an end date and a venue, taken from the JSON-LD each site publishes for machines to read. No prose is copied. Every source records the verdict of its own terms page before it is ever fetched, and a source whose terms forbid automated access is disabled and stays disabled; seven are.

Timezone Boundary Builder

Provides: One polygon per IANA time zone, so the place card judges Open and Closed by the place's own clock and can say what time it is there.
Licence: Open Data Commons Open Database License (ODbL) 1.0
Source: https://github.com/evansiroky/timezone-boundary-builder
Credit required: Timezone Boundary Builder, from OpenStreetMap data, ODbL
Shown: licence page only
Share-alike: Yes, and nothing is derived: the polygons are loaded as published and only ever read (which zone a point falls in), so there is no altered database to offer. The source's own release is the complete data.

python-holidays

Provides: The public holidays the date window and the events layer use.
Licence: MIT
Source: https://github.com/vacanza/holidays
Credit required: python-holidays, Vacanza Team and contributors
Shown: licence page only

MapLibre GL JS

Provides: The map engine the page runs.
Licence: BSD 3-Clause
Source: https://maplibre.org/
Credit required: None required by the licence.
Shown: licence page, and the licence banner at the top of the served JavaScript, which is never stripped

Barlow

Provides: The page's typeface for headings and controls.
Licence: SIL Open Font License 1.1
Source: https://github.com/jpt/barlow
Shown: licence page, and the full licence text served beside the fonts

Figtree

Provides: The page's typeface for body text.
Licence: SIL Open Font License 1.1
Source: https://github.com/erikdkennedy/figtree
Shown: licence page, and the full licence text served beside the fonts

Sources this public map does not serve

Two things the private version of this map can show are deliberately absent here, and it seems better to say which and why than to let you wonder.

Esri World Imagery

Would provide: Aerial imagery, as an optional hybrid basemap.
Why not: The imagery is licensed under the Esri Master License Agreement, a commercial agreement whose redistribution terms we have not read. An unauthenticated public proxy in front of somebody else's commercial basemap is not defensible on an unread clause, so the layer is not part of the public build at all.
Decided: 2026-09-22

Recreation.gov (RIDB)

Would provide: United States federal campgrounds, and the reservable flag and booking link on a campground already in OpenStreetMap.
Why not: The RIDB terms page is a JavaScript application that serves no text to a plain fetch, and four other routes to it produced nothing either, so the terms governing redistribution have not been established. The cost of waiting is small and measured: 2,226 standalone campgrounds out of 28,848,073 catalog rows, and the reservable flag on 3,028 more. It is excluded until somebody reads the terms.
Decided: 2026-09-22

Corrections and complaints

If something here is wrong, if a credit is missing, or if you believe material of yours is being used in a way its licence does not allow, write to [email protected] and it will be looked at. Map data errors are better fixed at the source: anyone can edit OpenStreetMap, and a fix there reaches this map on its next update.