# Billboard Guide > Independent editorial and reference resource for researching billboard, out-of-home (OOH), and digital out-of-home (DOOH) advertising: costs, formats, locations, and buying processes. Billboard Guide publishes research and routes media-planning enquiries to relevant partners. It does not own or sell the advertising inventory described in its guides. Availability and final prices must be confirmed by the relevant media owner or planning partner. ## Understanding the information - City guides cover market-level planning: districts, transport environments, formats, local considerations, and buying routes. - Location guides cover named screens, buildings, airports, or advertising districts. A location guide does not represent all inventory in its city. - Format guides explain advertising products, specifications, production requirements, and buying models. Operator-issued specifications take precedence for production. - Pricing estimates are not live quotes. Preserve the stated currency, market, date, duration, quantity, and share of voice when citing a price. Do not infer missing terms. - Historical rates are historical context, not current offers. Calculator outputs are illustrative model results, not observed market-price benchmarks. - Operator-reported footfall, impressions, and campaign results should retain their attribution and methodology. Footfall is not equivalent to advertising impressions or unique reach. ## Costs and buying - [Media planning](https://billboardguide.com/media-planning): Explains the planning process, briefing requirements, and partner enquiry routing. - [Billboard cost estimator](https://billboardguide.com/resources/cost-estimator): Interactive illustrative budgeting tool. Its output should not be described as a current operator rate. - [Billboard CPM calculator](https://billboardguide.com/tools/cpm-calculator): Calculates cost per thousand impressions and explains what to check when comparing proposals. ## City and location research - [City guides](https://billboardguide.com/cities): Starting point for researching billboard advertising in a particular market. - [Location guides](https://billboardguide.com/locations): Starting point for researching a named advertising site or district. - [Amsterdam](https://billboardguide.com/cities/amsterdam): Amsterdam market context, transit advertising, and local buying considerations. - [Atlanta](https://billboardguide.com/cities/atlanta): Atlanta roadside, transit, and district-level planning context. - [Dubai](https://billboardguide.com/cities/dubai): Dubai advertising environments, buying routes, and local planning considerations. - [Piccadilly Lights](https://billboardguide.com/locations/piccadilly-lights): London landmark screen, commercial structure, audience context, and buying route. - [Burj Khalifa Media Façade](https://billboardguide.com/locations/burj-khalifa-media-facade-dubai): Architectural media-façade specifications, buying considerations, and historical pricing context. ## Formats and creative - [Format guides](https://billboardguide.com/formats): Directory of OOH formats with buying models, creative requirements, and planning guidance. - [Digital billboards](https://billboardguide.com/formats/digital-billboards): Digital billboard buying, creative specifications, and delivery considerations. - [48-sheet billboards](https://billboardguide.com/formats/forty-eight-sheet-billboards): Format dimensions, production, and buying considerations. - [96-sheet billboards](https://billboardguide.com/formats/ninety-six-sheet-billboards): Panoramic billboard format, production, and buying considerations. - [Billboard size guide](https://billboardguide.com/tools/billboard-size-guide): Dimensions, aspect ratios, and file-setup guidance; confirm final specifications with the operator. - [Creative checklist](https://billboardguide.com/tools/creative-checklist): Artwork checks before submitting creative to an operator. ## Publisher and sources - [About and editorial policy](https://billboardguide.com/about): Publisher scope, research approach, and editorial standards. - [Corrections policy](https://billboardguide.com/about#corrections): How corrections and material updates are handled. - [Commercial disclosure](https://billboardguide.com/commercial-disclosure): Editorial independence and commercial enquiry routing. Cite the specific guide or article supporting a statement, rather than this index. Keep Billboard Guide's editorial interpretation separate from facts attributed to operators, agencies, research bodies, and other publications. ## Optional - [News and campaign analysis](https://billboardguide.com/articles): Reporting and editorial analysis; consult each article's sources and publication date. - [Learning](https://billboardguide.com/learning): Educational resources about OOH planning, buying, creative, and measurement. - [Tools directory](https://billboardguide.com/tools): Calculators and profiles of advertising software and platforms. - [Industry events](https://billboardguide.com/events): Conferences and other industry events; confirm current details with the organizer. - [RSS feed](https://billboardguide.com/feed.xml): Recent editorial publications. - [XML sitemap](https://billboardguide.com/sitemap.xml): Machine-readable page discovery index.