Credits

Inspiration & heritage

PostboxMap is inspired by the work of the Letter Box Study Group, the acknowledged authority on the history and development of the British roadside letter box.

• Letter Box Study Group (LBSG)
  Founded in 1976, the LBSG has identified around 800 different types of postbox and works with Royal Mail to protect and preserve letter box heritage. We link to them on our About page and encourage anyone interested in the history of British postboxes to explore their site and consider joining.

Photography & images

Homepage images are used under the Unsplash License. No attribution is required; we credit contributors here for transparency.

• Hero image (homepage background)
  Red mail box on street during daytime — Camellia Yang on Unsplash
• Marketing section image
  UK street scene — Jason Goodman on Unsplash

Identification guide photos

Photos used in the Identification guide (royal cyphers and postbox types) are credited below.

• Queen Victoria (VR)
  Wikimedia Commons (CC BY-SA 3.0)
• King Edward VII (E VII R)
  Mike Quinn, Geograph (CC BY-SA 2.0)
• King George V (GR)
  JThomas, Geograph (CC BY-SA 2.0)
• King Edward VIII (E VIII R)
  Mike Quinn, Geograph (CC BY-SA 2.0)
• King George VI (G VI R)
  Vclaw / Dan Sellers, Wikimedia Commons (CC BY-SA 3.0)
• Queen Elizabeth II (E II R)
  Wikimedia Commons (public domain)
• King Charles III (C III R)
  Norphil
• Pillar Box
  Kitmaster, Wikimedia Commons (PD)
• Wall Box
  Sebastiandoe5, Wikimedia Commons (CC BY-SA 4.0)
• Lamp Box
  Phil Nash, Wikimedia Commons (CC BY-SA 4.0)
• Ludlow
  BazzaDaRambler / Ultra7, Wikimedia Commons (CC BY 2.0)
• Double Aperture
  Gerald England, Geograph (CC BY-SA 2.0)
• Coffin Box
  Trish Steel, Geograph (CC BY-SA 2.0)
• Parcel Postbox
  sludgegulper / Oxyman, Wikimedia Commons (CC BY-SA 2.0)
• Penfold
  Mike Quinn, Geograph / Wikimedia Commons (CC BY-SA 2.0)

Maps & geocoding

Map tiles and geodata are provided by OpenStreetMap. Address lookup (reverse geocoding) uses Nominatim.

• © OpenStreetMap contributors — map data and tiles (explore map, location maps, minimap).
• Nominatim — reverse geocoding for address/place names when adding a postbox or viewing a postbox location (usage policy).

Mapping software

Interactive maps are built with the following open-source libraries and assets.

• Leaflet — JavaScript map library (BSD-2-Clause). Used with React-Leaflet.
• Leaflet.markercluster — marker clustering on the map (MIT).
• Leaflet.Locatecontrol — “find my location” button (MIT).
• leaflet-color-markers (pointhi) — coloured map marker icons (MIT).

Fonts

The site uses the Inter typeface for body text and UI.

• Inter — designed by Rasmus Andersson, served via Google Fonts (SIL Open Font License).

Icons

UI icons are from Font Awesome (where used on the site).

• Font Awesome — icon font (v4.7, Free). Served via cdnjs. Font Awesome Free license allows use with attribution; this page serves as that attribution.

Other

Logo, identification-guide SVGs (royal cyphers), favicons, and default placeholder images are project-owned or created for PostboxMap. Some achievement badge images are from Vecteezy. Default map marker pin imagery is from the Leaflet project (see Mapping software).