How to parse netcdf to use forecast::enfuser::airquality?

[antont]

Hi - I hope it's OK to use this for support requests. I'd need to use the ENFUSER Air Quality data, which is available as a grid. Am doing model_data = download_stored_query("fmi::forecast::enfuser::airquality::helsinki-metropolitan::grid")

However, it is apparently as NetCDF (I don't know yet what that format is), and parsing that is not implemented, so I get:

fmiopendata\grid.py", line 69, in parse
raise NotImplementedError("No parser for %s" % format)
NotImplementedError: No parser for format=netcdf

How should I go about getting the data?

Can I just get it simply without real parsing? Or could I pass it to an external parser, like there seems to be some Python NetCDF code in http://www.umr-cnrm.fr/gmapdoc/meshtml/EPYGRAM1.0.0/_modules/epygram/formats/netCDF.html ?

Or would it be better to add the support to fmiopendata somehow? Sorry for being clueless but I think that will be able to solve this somehow, would just be nice to get some guidance as am not familiar with that format and this lib from before.

[pnuu]

Ideally we'd implement the download and data handling to fmiopendata. It shouldn't be very complicated, but I'm not sure when I'll find the time to implement this.

In the meanwhile, you can download the NetCDF4 files by finding the download URLs from the StoredQuery output XML by searching gml:fileReference from https://opendata.fmi.fi/wfs?service=WFS&version=2.0.0&request=getFeature&storedquery_id=fmi::forecast::enfuser::airquality::helsinki-metropolitan::grid and then using Python NetCDF4 library to read the data. There are several of these gml:fileReference blocks in the XML, one for each model run start time.

[antont]

Hi again - just for info, that I did manage to handle the NetCDF data from there using that NetCFD4 lib. Can try to help later if something is needed for the integration or if someone else needs a hand with that.