Precipitation1h values are all NaN when using fmi::observations::weather::multipointcoverage about metolib

[TheKarppinen]

Notice, all stations do not provide data for all the parameters.

For example:

Helsinki Rautatientori does not provide values for Precipitation1h parameter.
http://data.fmi.fi/fmi-apikey/insert-your-apikey-here/wfs?request=getFeature&storedquery_id=fmi::observations::weather::multipointcoverage&timestep=60&starttime=2014-02-06T13:33Z&endtime=2014-02-12T13:32Z&parameters=Precipitation1h&place=Helsinki

But, Helsinki Kumpula provides data for Precipitation1h.
http://data.fmi.fi/fmi-apikey/insert-your-apikey-here/wfs?request=getFeature&storedquery_id=fmi::observations::weather::multipointcoverage&timestep=60&starttime=2014-02-06T13:33Z&endtime=2014-02-12T13:32Z&parameters=Precipitation1h&place=Kumpula,Helsinki

Does this seem to be the cause of the problem in your test?

[hiitsu]

OK, good to know, so this can be tagged as question. How to know which stations provide which data? Currently i just need to make few per city or quite coarse weather history requests, is this fmi::observations::weather::cities::timevaluepair the way around then?

[TheKarppinen]

At the moment, there is no straight forward way to check which stations provide which data.

Catalog ( http://catalog.fmi.fi ) may be used to check information about different sites and data. But, sorry to say that even that service does not directly tell which stations provide which data.

Maybe you could simply check if the site gives only NaN values for the given parameter. If all values are NaN, you could assume that parameter is not supported for that site.

Notice, MetOLib supports only multipointcoverage queries. Therefore, MetOLib can not handle fmi::observations::weather::cities::timevaluepair query that provides timevaluepair content.

[hiitsu]

Ok, thanks for quick replies. We'll make NaN handlings, and use more specific station when needed