All Questions
19 questions
0
votes
1
answer
75
views
How to get the right URL for thredds and load ncml data in R?
I'm trying to load some climate data from PAVICS with thredds in R.
library(ncdf4)
library(thredds)
url = "https://pavics.ouranos.ca/twitcher/ows/proxy/thredds/catalog/datasets/simulations/...
- 3,491
1
vote
1
answer
60
views
Writing an ncdf4 file to disk after accessing it through OPeNDAP using R?
I am accessing a ncdf file from a thredds server and subsetting using openDAP, however while I can open and access the file connection, I cannot seem to copy the entire *.nc file to my local disk. Is ...
- 13
0
votes
1
answer
327
views
Error when trying to remotely access MERRA-2
I'm trying to get PM2.5 data from the public NASA data base. Specifically, I'm following all the steps from this guide. I also created the three files just as explained on this requirements website.
...
1
vote
1
answer
181
views
Calculating the size (bytes) of subset large netCDF file from a THREDDS Data Server before reading the file using ncvar_get?
I'm using nc_open to get a DatasetNode from a THREDDS Data Server, and reading a subset of the data in ncvar_get by specifying start and count. Reproducible example below:
library(thredds)
library(...
- 182
1
vote
0
answers
145
views
Abort download.file in R if file becomes too large
In a shiny app I would like users to be able to download a remote (.nc) file with file size limit of say, 100MB.
For some files inspecting the header works well, as suggested here https://...
- 488
0
votes
1
answer
1k
views
How to download and subset netCDF files from NCEI THREDDS server
I am trying to download and subset the files located here: https://www.ncei.noaa.gov/thredds-ocean/catalog/ncei/archive/data/0129374/daily/catalog.html, but I'm not sure if I'm doing something wrong ...
- 16.9k
0
votes
1
answer
301
views
How to format netCDF datasets to be compatible with Thredds OGC services
I have a netcdf dataset produced from the NASA LIS model that i want to be able to show through WMS using a Thredds server. The specific dataset and thredds server can be found at https://tethys.byu....
0
votes
2
answers
388
views
NcML aggregation of remote THREDDS catalog
I want to aggregate all files within a specific directory of a remote THREDDS catalog. These are grib2 files for nam forecast. This is the main list of directories for each month. Here is my ncml file ...
- 207
-1
votes
1
answer
162
views
How to get Contours in ncWMS thredds vertical section for getVerticalSection request
How to get Contours in ncWMS thredds vertical section for getVerticalSection request. I need to obtain some pngs with contours on them for a project using thredds 5.0.0, I am unable to find find any ...
- 59
0
votes
1
answer
430
views
Thredds getCapabilities for ncWMS server
Thredds Data Server TDS provides getCapabilities for a netCDF file.
e.g. http://localhost:8080/thredds/wms/testAll/Filename.nc?service=WMS&version=1.3.0&request=GetCapabilities
Here, the ...
- 195
1
vote
1
answer
1k
views
THREDDS Server NetCDF file via WMS
I have setup TomCat and THREDDS server (loaded war file) and attempted to serve up some *.nc files using via WMS protocol.
I can request the file but all I seem to get back is a black image.
I had ...
- 260
0
votes
1
answer
652
views
Using Javascript to make parallel server requests THREDDS OPeNDAP
For the following THREDDS OPeNDAP server:
http://data.nodc.noaa.gov/thredds/catalog/ghrsst/L2P/MODIS_T/JPL/2015/294/catalog.html
I would like to note four Attributes of every file in there. The ...
0
votes
2
answers
452
views
THREDDS OPeNDAP speed Matlab
Using the following code in Matlab:
nc_file_list = {'http://data.nodc.noaa.gov/thredds/dodsC/ghrsst/L2P/MODIS_A/JPL/2015/287/20151014-MODIS_A-JPL-L2P-A2015287235500.L2_LAC_GHRSST_D-v01.nc.bz2'};
...
- 145
3
votes
5
answers
1k
views
Using NCML to reduce dimensions in netCDF file
I'm trying to use NCML to 'convert' a CF-1.4 file to CF-1.6. Of particular interest is how to 1) remove dimensions and then 2) change the dimensions of variables. For example, below are the top ...
- 83
1
vote
1
answer
271
views
NcML aggregation of remote 3D and 4D variables?
Can NcML be used to aggregate 3D and 4D grids? I wasn't sure since they differ in the number of dimensions. e.g. sea surface height (ssh) and water temperature, where ssh has three dimensions [time, ...
- 123
1
vote
1
answer
344
views
Loading data on Unidata Integrated Data Viewer (IDV) from a THREDDS catalog?
I am trying to load some data to IDV from a THREDDS server via the catalog, but I get error messages such as
Server does not support Content-Length
I can add netcdf data from my local folders, but ...
- 724
1
vote
2
answers
234
views
Is there a hardwired limit to the NcML/THREDDS values element?
Is there a limit to the size or number of entries that can be placed within the values NcML element? I'm attempting to get a set of NetCDF files without lon/lat variables -
but with x/y variables - ...
- 13
1
vote
1
answer
4k
views
Best way for Excel users to access NetCDF files on a THREDDS Data Server?
I have seen the following example to access a netcdf file using excel.
I was wondering if it possible to access a certain part of the data based on specific indices (e.g. a time series of a ...
- 724
2
votes
2
answers
979
views
THREDDS server using Godiva viewer
Anyone knows how I can configure the godiva viewer in order to get a specific colour palette and specific range of values?
This is an example, where the colour palette is the default, but the range ...
- 1,961