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ARIA Atlas

Data licences

The Atlas is built from open data. Here is every source, the licence it comes under, and a link to that licence in full. Where a licence asks us to say what we changed, we say it.

How the Atlas works

Overture Maps Foundation: the rooms

Each room's name, kind, address, website, phone and place on the map. Release 2026-09-23.1. Overture’s attribution page.

Attribution: Overture Maps Foundation, overturemaps.org.

What we changed. We kept the rooms with a stage, folded two listings of the same room into one, added facts from Wikidata, gave each room an area by its county, and wrote the result into the files this site reads. Bars and thin listings are kept but not shown.

Foursquare OS Places Notice

© 2026 Foursquare Labs, Inc. All rights reserved.

The Foursquare OS Places dataset (the "Data") is licensed under the Apache License, Version 2.0 (the "License"). You may not use, modify, or distribute the Data except in compliance with the License.

As set forth more fully in the License, if you use, modify, or distribute the Data, you must:

  • provide recipients with a copy of the License.
  • if applicable, include prominent notices to the extent you've changed the Data.
  • preserve attribution to Foursquare, including preserving the full content of this NOTICE.txt file.

To ensure appropriate attribution to Foursquare, we recommend the following:

  • if using/distributing the Data in flat file form as-is or after making changes/modifications: include this NOTICE.txt file, which may be modified to include an additional notice of your changes/modifications, if any.
  • if using/distributing the Data in API form as-is or after making changes/modifications: include a copy of the content from this NOTICE.txt file prominently in your developer documentation for such API, which may be modified to include an additional notice of your changes/modifications, if any.

You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0. Unless required by applicable law or agreed to in writing, the Data distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and limitations under the License.

We also encourage you to join our Placemaker community where you can contribute and provide suggestions to improve the accuracy of the Data for future releases for yourself and others.

Wikidata: capacities and other facts

Capacities, opening years, other names, and which photo a room uses come from Wikidata, whose data is available under CC0 1.0 (Wikidata’s licensing). A room's page links its Wikidata item.

Wikimedia Commons: the photos

Each photo is credited on its room's page with its author, its licence and a link to its page on Wikimedia Commons. We take only free licences: CC BY and CC BY-SA in any version, CC0, and the public domain; never a licence that forbids commercial use or changes. The credit line links each photo's own licence.

What we changed. Every photo was resized to at most 720 pixels wide, turned upright where its file said so, and saved as WebP. Nothing else. A photo a venue adds is hosted on the venue's own website, or by the site builder its website is made with, and credited as the venue asks.

OpenStreetMap: the roads

The roads on the area maps and in each room's street panel are © OpenStreetMap contributors, through the transportation theme of Overture Maps, and available under the Open Data Commons Open Database License (ODbL) 1.0. Attribution: © OpenStreetMap contributors, Overture Maps Foundation.

The road files this site draws (one or two for each area, under /assets/atlas/streets/) are a database derived from OpenStreetMap: we kept motorways down to tertiary roads, joined each road's pieces, simplified the lines and cut them by area. We offer those files under the ODbL 1.0 too: you may use them on the same terms. They are kept apart from the rooms, which are not derived from OpenStreetMap.

U.S. Census Bureau: states, counties and areas

State and county boundaries from the Census Bureau's 2024 cartographic boundary files, and the 2023 metro and micro area list the areas are grouped by. Works of the U.S. government are in the public domain. We grouped the counties into areas and simplified the shapes for drawing.

The code that draws the map

Each is served from this site, never from anybody else's.

What is written here

Reviews are written on this site by ARIA accounts, and dates and facts by ARIA, by venues and by artists. None of it is copied from another site. Questions about any of this: the contact page.