Website openweathermap.org | Founded 2012 | |
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Owner Extreme Electronics LTD. | ||
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OpenWeatherMap is an online service that provides weather data, including current weather data, forecasts, and historical data to the developers of web services and mobile applications. For data sources, it utilizes meteorological broadcast services, raw data from airport weather stations, raw data from radar stations, and raw data from other official weather stations. All data is processed by OpenWeatherMap in a way that it attempts to provide accurate online weather forecast data and weather maps, such as those for clouds or precipitation. Beyond that, the service is focused on social aspect by involving owners of weather stations to connect them to the service to increase accuracy of weather data. The ideology is inspired by OpenStreetMap and Wikipedia that make information free and available for everybody. It uses OpenStreetMap for display of weather maps.
Contents
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API
OpenWeatherMap provides an API with JSON, XML and HTML endpoints and a limited free usage tier. Making more than 60 calls per minute requires a paid subscription starting at USD 40 per month. Access to historical data requires a subscription starting at 150 USD per month. Users can request current weather information, extended forecasts and graphical maps (showing cloud cover, wind speed, pressure and precipitation).
Current weather data
Current data is refreshed every ten minutes; it can be searched by city or by geographic coordinates on Earth.
Forecasts
Weather forecasts can be searched by city or by coordinates. Three-hourly forecasts are available for up to 5 days, while daily forecasts are available for up to 16 days.
Searching
The OpenWeatherMap geocoding system allows users to select cities by name, country, zip-code or geographic coordinates. It is possible to search by part of city name. To make searching result more accurate city name and country should be divided by comma.
Maps
OpenWeatherMap service provides lots of weather maps including Precipitations, Clouds, Pressure, Temperature, Wind and many others. Maps can be connected to mobile applications and web sites. Weather maps can be connected as layers to the wide range of maps including Direct tiles, WMS, OpenLayers, Leaflet, Google maps, and Yandex maps.
Licensing
All data that OpenWeatherMap provides is used under the terms of a Creative Common Attribution-ShareAlike license. However, any access beyond 60 requests of basic data per minute, as well as bulk downloading of weather readings and forecasts, require a paid subscription.