8 ms·

Like another commenter I am curious about where the data comes from. The occasional blinking dot on a map does not provide a lot of information about how they a

by dfc 13y ago

Like another commenter I am curious about where the data comes from. The occasional blinking dot on a map does not provide a lot of information about how they amassed the data from 40,000 weather stations. When I did not see a lot of details it occurred to me that they might be acting as a middleman for Weather underground's API. However Weather Underground claims to have the most weather stations and they list a lower bound of 25,000 weather stations.[1] [1] http://www.wunderground.com/weatherstation/about.asp http://www.wunderground.com/weatherstation/about.asp

est 13y ago
They use public airport weather data
- dfc 13y ago
  Who is "they"? I am assuming you mean openweather. Given that the page linked above details the use of personal weather stations you certainly cannot be referring to WeatherUnderground. Where did you find the source of the data for openweather? Addendum: See my comment below. The number of airports and airfields visible from the air does not get you over 45k.
- pellias 13y ago
  Yup, when i zoomed in to see the station information, all of them are airports.
  - dfc 13y ago
    The numbers do not add up. According to the CIA in 2012 there were 43,794 airports or airfields that are recognizable from the air. This number includes airfields that are "unpaved (grass, earth, sand, or gravel surfaces) and may include closed or abandoned installations." The 2010 figure is 43,982.[2][3] [1] https://www.cia.gov/library/publications/the-world-factbook/fields/2053.html https://www.cia.gov/library/publications/the-world-factbook/... [2] http://web.archive.org/web/20120208135324/https://www.cia.gov/library/publications//the-world-factbook/fields/2053.html http://web.archive.org/web/20120208135324/https://www.cia.go... [3] I found this to be interesting: Afghanistan lost an airport/airfield over those two years.
miahi 13y ago
Looks like they are using airport data (identified by ICAO ID) and ham radio data (probably via APRS, identified by callsigns), like this one: KA0RUX http://openweathermap.org/station/10400 http://openweathermap.org/station/10400 http://www.findu.com/cgi-bin/wxpage.cgi?call=KA0RUX http://www.findu.com/cgi-bin/wxpage.cgi?call=KA0RUX There is also an API to feed new data if you have a weather station: http://openweathermap.org/stations http://openweathermap.org/stations

by dfc 13y ago

est 13y ago

They use public airport weather data

dfc 13y ago
Who is "they"? I am assuming you mean openweather. Given that the page linked above details the use of personal weather stations you certainly cannot be referring to WeatherUnderground. Where did you find the source of the data for openweather? Addendum: See my comment below. The number of airports and airfields visible from the air does not get you over 45k.
pellias 13y ago
Yup, when i zoomed in to see the station information, all of them are airports.
- dfc 13y ago
  The numbers do not add up. According to the CIA in 2012 there were 43,794 airports or airfields that are recognizable from the air. This number includes airfields that are "unpaved (grass, earth, sand, or gravel surfaces) and may include closed or abandoned installations." The 2010 figure is 43,982.[2][3] [1] https://www.cia.gov/library/publications/the-world-factbook/fields/2053.html https://www.cia.gov/library/publications/the-world-factbook/... [2] http://web.archive.org/web/20120208135324/https://www.cia.gov/library/publications//the-world-factbook/fields/2053.html http://web.archive.org/web/20120208135324/https://www.cia.go... [3] I found this to be interesting: Afghanistan lost an airport/airfield over those two years.

miahi 13y ago

Looks like they are using airport data (identified by ICAO ID) and ham radio data (probably via APRS, identified by callsigns), like this one: KA0RUX http://openweathermap.org/station/10400 http://openweathermap.org/station/10400 http://www.findu.com/cgi-bin/wxpage.cgi?call=KA0RUX http://www.findu.com/cgi-bin/wxpage.cgi?call=KA0RUX There is also an API to feed new data if you have a weather station: http://openweathermap.org/stations http://openweathermap.org/stations