Re: WeatherData - many properties unavailable?
- To: mathgroup at smc.vnet.net
- Subject: [mg96318] Re: WeatherData - many properties unavailable?
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Wed, 11 Feb 2009 05:23:09 -0500 (EST)
- Organization: The Open University, Milton Keynes, UK
- References: <gmrm7r$9pd$1@smc.vnet.net>
In article <gmrm7r$9pd$1 at smc.vnet.net>,
Jason Evans <jason at bluejalapeno.com> wrote:
> I am interested in the WeatherData function, but it appears that a lot
> of data is unavailable. For example, for the 20 weather stations
> closest to "New York" (where I live), Visibility, CloudCoverFraction,
> and PrecipitationRate are "Missing[NotAvailable]". I understand that
> not all properties are always available, but these seem to be pretty
> basic, important properties, and this information *is* available if
> you go to websites for the individual weather stations.
>
> Example code to show the property for the 20 stations closest to New
> York would be:
>
> Map[WeatherData[#, "Visibility"] &, WeatherData[{"New York", 20}]]
>
> I also tried this for other large cities, such as Dallas and Chicago,
> with similar results.
>
> Am I doing something wrong, or is a lot of the data just not available
> through Mathematica?
Unfortunately, your are right in assuming that a lot of data is not ---
yet? --- available through the Mathematica curated data system. And this
is not just about weather data, as many recent posts on this discussion
list tend to suggest.
Regards,
--Jean-Marc