Reference

Data sources

TravelDay brings several kinds of information into one place. This page names the public providers behind the facts you see without publishing our internal scoring, ingestion, or operations playbook.

We show the source

Alerts and map layers carry source attribution where available. TravelDay may organize, summarize, or derive a display from that material; it does not turn a third-party report into an official TravelDay warning.

Absence is not assurance

No alert, advisory, or mapped incident means only that none was available to us. Sources can be delayed, incomplete, or temporarily unavailable. Use official local guidance for urgent decisions.

Advisories, disasters, and health

TravelDay attaches the originating organization to alerts whenever the source is known.

U.S. Department of StateCountry travel-advisory levels and risk indicators.These advisories are written for U.S. citizens, not every nationality.GDACSGlobal natural-disaster events and published alert levels.U.S. Geological SurveySignificant earthquake events, magnitude, location, and time.UN OCHA ReliefWebOngoing humanitarian crises and disaster reports.World Health OrganizationDisease Outbreak News and recent public-health events.

Weather and climate

Forecasts, seasonal context, and precipitation layers come from different providers because they answer different questions.

MET NorwayCurrent conditions and short-range global forecasts.NASA POWERLong-term climate normals used for seasonal destination context.Climate normals describe typical conditions, not a forecast for a specific trip.RainViewer, NASA GIBS, and NOAARegional radar and global precipitation map layers, selected according to coverage.

Maps, places, and photographs

Community and open-data projects provide the geographic facts; TravelDay adds its own organization and traveler-facing context.

OpenStreetMap contributorsPlace names, categories, roads, amenities, and other mapped features.Community map coverage varies by place and can be incomplete or outdated.Overture Maps FoundationAdditional open place records used to improve catalogue coverage.Wikidata and Wikimedia CommonsLandmark facts, descriptions, and appropriately licensed photographs.GeoNames and Natural EarthPlace search, administrative names, and geographic bounds.

Visa guidance and relative costs

These datasets help with planning, but neither replaces an official immigration decision or a personal budget.

Passport Index community datasetA baseline of passport-to-destination entry requirements, supplemented by TravelDay-reviewed corrections.Always confirm entry rules with the destination's embassy or immigration authority before travel.World BankCountry-level price comparisons for a typical basket of everyday spending.This is a relative national index, not a live quote or a city-level travel budget.U.S. Bureau of Economic AnalysisRegional price comparisons for U.S. states.

What TravelDay keeps internal

We do not publish API credentials, vendor contracts, ingestion architecture, security controls, operational schedules, model prompts, scoring weights, or the detailed methods used to prioritize and reconcile sources.

We do publish the source names and the limitations that change how a traveler should interpret the result. If a displayed fact includes a direct source link, follow that link for the provider's latest version.

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