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Questions tagged [opendap]

Stands for "Open-source Project for a Network Data Access Protocol"

"Open-source Project for a Network Data Access Protocol"

Home: https://www.opendap.org/
Wikipedia: https://en.wikipedia.org/wiki/OPeNDAP

44 questions
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array size limit for matlab ncread

I've found when trying to access a large(ish) array via OPeNDAP using Matlab and ncread, the result returns all zeros at some array size limit.I'm trying to figure out if this is a Matlab/ncread limit or OPeNDAP issue. I'm accessing a data set…
JimP
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Batch download data from OpenDAP using Python

I am trying to download multiple .nc files from OpenDAP. When I download the files manually (without a script) the files work as expected. To try speed the process up, I have a script that batch downloads data. However, when I download data using…
Jetman
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Get data from OpenDap server that requires authentication using R

I'm trying to get data from an OPeNDAP server using R and the ncdf4 package. However, the nasa eosdis server requires username / password. How can I pass this info using R? Here is what I'm trying to do: require(ncdf4) f1 <-…
Daniel
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How to open multiple NetCDF files with xarray via OpenDAP?

I'm trying to open multiple NetCDF files hosted on OpenDAP on a THREDDS server, using xarray.open_mfdataset(), but I get an error. If I open only one file (but still with open_mfdataset()), it works, if I open two, it doesn't. For example, this…
Tor
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Downloading and opening netcdf files from OPeNDAP in Windows R 64bit

I am trying to download and open netcdf files from an open, online database called OPenDAP. When I download the datafiles directly from OPenDAP's server dataset access form, naming the file, "MUR_JPL_L4_GLOB_opendap.nc.nc4", I can download and view…
Benjamin Kraemer
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date-time conventions via OPeNDAP

I've run across an issue with date-time conventions in a file served via OPeNDAP. In particular this problem arises from the GrADS DODS Server (GDS). The GDS can serve files via reading a data descriptor (ascii file) that contains the specifics of…
JimP
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How to get data from NOMADS with javascript?

My goal is to get the daily wind data from nomads, so I set the grib filter 10m above the ground with and got the url, tried to fetch on js, the response was ok but with empty data, I tried also with axios but always empty data: function…
C-Gian
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How to access the zip dataset provided through Opendap link using python?

I have opendap Link which contains 62 zip files and this each zip files contains one netcdf files with names like "GCP-GridFEDv2022.2_1959.zip" for each year. Now I don't want to download it's of size nearly 500gb. Therefore, I want to access it…
Shubho
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OPeNDAP - subset lat and long using a shapefile

I want to open SST data from NOAA opendap, clip the region that I am interested in, load the variables of interest, do some summary stats, and then close the file. Because I want to do it for daily data over several years, I do not want to save the…
ArnoLB
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Why can I not access ESGF data via OPeNDAP, despite my valid credentials?

I would like to access climate (CORDEX) data through ESGF's OPeNDAP service via Python (xarray looks like a great option). This dataset is an example of one I cannot access:…
TiemvdDeure
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UnicodeDecodeError when trying to load Daymet V4R1 data via python open_url

I am trying to download Daymet data via python, using the following jupyter notebook provided by the ORNL: https://github.com/ornldaac/daymet-python-opendap-xarray/blob/master/1_daymetv4_discovery_access_subsetting.ipynb Everything works fine until…
Marco
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Why is January and most of February data missing from CDO API request

Using the Climate Data Online WebAPI, every request I make fails to return January data and most of February. Only February 28th (and 29th) will be present. I've tried breaking up the data into smaller chunks, multiple stations, and I'm not bumping…
stellaminor
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Efficiently access small chunk of grid on OPeNDAP server with python xarray when grid is saved in a sparse format

I am trying to access gridrad data. This data is stored on an OPeNDAP server, with one URL/file for each timestamp (example). Normally xarray is great for accessing these OPeNDAP grids, because you can slice up the giant grid to get only the section…
hm8
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Integrating a custom function in Django

I would like to access and print metadata (attributes and values) served by an ERDDAP server, which is a variety of OPeNDAP, on my Django website. so I prepared a simple example function called get_conventions to access a metadata field on this…
marsisalie
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Failed processing format-parameters; Python 'maskedarray' cannot be converted to a MySQL type

I'm still new to python linked to MySQL, and I'm getting a problem like below. are there any clues I should do? Here is my code: import mysql.connector from netCDF4 import Dataset import numpy as np import matplotlib.pyplot as plt import…
user16710611
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