Data Sources
This guide is built on open data and openly licensed material, combined with our own editorial work. We believe in being transparent about where our information comes from so you can trust it and check it for yourself.
Map and location data
Pool locations and map data are derived from OpenStreetMap, made available under the Open Database License (ODbL). We are grateful to the global community of OpenStreetMap contributors whose work makes a directory like this possible.
Photography and images
Venue photographs may come from Google Places, Wikimedia Commons or Mapillary, each used in line with its licence and attributed to its source. Our header image is by Marc Ryckaert (MJJR), licensed under CC BY 3.0, via Wikimedia Commons.