Siphon - A collection of Python utilities for retrieving data from Unidata data technologies.
Here is an example snipet:
from siphon.radarserver import RadarServer, get_radarserver_datasets
from siphon.catalog import TDSCatalog, get_latest_access_url
from datetime import datetime, timedelta
site = 'KDOX'
cat = TDSCatalog('http://thredds-aws.unidata.ucar.edu/thredds/radarServer/catalog.xml')
rs = RadarServer(cat.catalog_refs['S3 NEXRAD Level II'].href)
rs.stations[site]
query = rs.query()
query.stations(site).time(datetime.utcnow())
rs.validate_query(query)
catalog = rs.get_catalog(query)
dataset = list(catalog.datasets.values())[0]
thanks! actually I'm just wondering if I could access a url like this: https://rda.ucar.edu/thredds/catalog/files/g/ds084.1/2017/20170101/catalog.html
I tried initializing a TDSCatalog instance with that url, except I swapped .html for .xml
archives = TDSCatalog('https://rda.ucar.edu/thredds/catalog/files/g/ds084.1/2017/20170101/catalog.xml')
and while that url exists - TDSCatalog returns a
No name found
I dunno maybe I'm doing it wrong - but it looks like the constructor just needs a valid url
and I see a 'name' variable in that xml
ah :P sorry ok thanks. I'll search through the issues first next time
so I've added the sessionmanager instance
but now I'm wondering where I'd get a username and password.
I see a "register" button on the unidata homepage.
Is that where I'd get one?
No, since you're using the RDA, you'd need to get it from them. There's a register now link here: https://rda.ucar.edu
I have a question that might be more of a NetCDF4 question, not sure
let's say I make a DataQuery object, call it query
and do a lonlat_point query
and my dataset is a grib2 file
does it look for values based on the nearest grid point?
@dopplershift yeah I really like using this service - siphon in combination with this THREDDs-based technology makes things easier
@dopplershift I got a bunch of grib2s that are filed away actually. And I'm looking at a scalable way of processing them
@dopplershift Maybe this question is better asked to THREDDs at large, but I'm wondering: how much setup is involved with making our own THREDDs instance?
so something that serves grib2 data, has all that XML metadata, etc
like would this tutorial be up to date - fairly straightforward? https://www.unidata.ucar.edu/software/tds/current/tutorial/GettingStarted.html
Greetings @mikebelanger - that tutorial is a bit out of date with respect to the Java and Tomcat instructions. I updated the first part of that page to point to our 5.0 documentation, which includes updated instructions. Same thing with the Security page of the tutorial (https://www.unidata.ucar.edu/software/tds/current/tutorial/Security.html). The rest should be good to go for the 4.6 release, though. If you are most interested in serving GRIB output, then you really should run the 5.0 beta version, as many fixes have been added there that are not available in 4.6. We hope to get TDS 5.0 stable this fall.
oh and thanks for revising that tutorial page too.
@lesserwhirls the 5.0 documentation looks pretty comprehensive! I guess once the grib-loading stuff for 5.0 is firmed up - sections like this will be filled in? https://docs.unidata.ucar.edu/tds/5.0/userguide/grib_files_cdm.html
Hi, is this one of your examples translated to Spanish? https://pybonacci.org/2018/11/27/creacion-de-videos-al-vuelo-en-el-notebook/