How To Open Netcdf File

Create Variable and Specify Dimensions and File Format. Requirements If you want to use this library on any GNU/Linux or OSX system you just need to execute:. After you log in to an ftp site, ftp will print out the file transfer type. NetCDF files are handled kind of like databases (you open a connection to it first, then extract parts of the actual contents). netcdf file(s) you will be making into a Plot. [ncl-talk] How to convert netcdf to grib format Guido Cioni guidocioni at gmail. 1 is the same as NetCDF Extractor V2. Renames an attribute in a NetCDF file. Return to the Resources page. In fact, this tool is the nc file viewer, nc file converter, and nc file extractor. Define the dimensions - one per dimension. Displaying!information!on!the!NetCDF!file! 9! Creating'a'temperature'table'at'a'specific'location' 11! Value!tool! 11! gdal2xyz! 11! Finding'temperature'difference'betweentwotime'steps' 13! Creating'a'temporal'animation' 15! Loop!Visible!Layers! 15! Time!Manager!plugin! 15!!!!! NetCDF in QGIS tutorial by. Here is an example of very basic fortran program that can be used to read a netcdf file, create or modify a variable and create a new netcdf file that is similar to the. nc > precip. putVar(ncid,varid,start,count,data) writes a section of values into the netCDF variable at the index specified by the vector start to the extent. netcdf driver does not detect. For example, you may want to read in and visualize the raw data output from a WRF run which does not have a netcdf file extension:. Update Your NOAA-Related Hardware Device Drivers. The cdf file extension is used for an ASCII format describing VRML worlds. NcBrowse NcBrowse is a Java application that offers flexible, interactive graphical displays of data and its attributes from a wide range of netCDF data file conventions. A netCDF file is a reasonably compact portable binary format. [chunksize_out,ncid] = netcdf. Uses sgt graphics to perform 1 and 2 dimensional cuts through data. ncdump Go to the directory of your dataset and try. install python 3. You must remember that if your variable is a 3D i. Was looking to go from GeoTIFF to GMT format (netCDF) but couldn't seem to work it. Displaying netCDF data as a point feature class. Update: For those using Matlab version 2010b and higher a netcdf set of routines is now incorporated in the distribution. Right‐click Make NetCDF Raster Layer and click Open or double‐click the tool. nc) How to download Sea Surface. Panoply plots geo-referenced and other arrays from netCDF, HDF, GRIB, and other datasets. Tools Powered by a free Atlassian Confluence Open Source Project License granted to HDF. • Sample netCDF datasets in a directory called "sample_data" • A README file On many platforms, you should be able to launch Panoply by double-clicking on the Panoply. The traditional python interface for netCDF is the scipy. This article will describe the use of Geospatial Data Abstraction Library (GDAL) tools for converting SNODAS binary files to NetCDF or GeoTIFF. This should install CDO with grib, netcdf and HDF5 support. The netCDF4 module at netcdf4-python. If the file is open for write access (mode='w', 'r+' or 'a'), you may write any. com Mon Feb 13 03:50:12 MST 2017. The syntax is different and the following script is then rather outdated. NETCDF files When you attempt to open a. Opening and closing files before and after each write is way too time-consuming, so I open all the files at the beginning of the simulation and close them at the end. NETCDF file you've received through an email attachment or a file on your hard drive, but your computer won't let you do it. Learn more about netcdf, load, string array Open Mobile Search. nc','netcdf4'); I call the netcdf pointer a scope and not ncid or nc because in netCDF4, we can create groups with their own dimensions and variables. I'm restricted to using MS SDS and C#. 6), an interface for reading and writing files in Unidata NetCDF format, and gives an introduction to the NetCDF file format. The Virtual Reality Modelling Language (VRML) is the standard file format for describing 3D objects and interactive scenes that can viewed and explored on the World-Wide Web. Search options can easily be refineed for the storm (or storms) that are of interest to the user. The particular data set that you are referencing is not organized in such a way that Global Mapper can read it. dbf north_dehli. Handles character variables. Without proper software you will receive a Windows message "How do you want to open this file?" (Windows 10) or "Windows cannot open this file" (Windows 7) or a similar Mac/iPhone/Android alert. In our case, it is binary. ncname is the name of the neCDF file, while dname is the name of the variable that will be read in. Obtain Another Copy of Your NETCDF File. NetCDF-4 allows you to store attributes, variables, and dimensions in hierarchical groups, which look much like a UNIX file system. ncid = netcdf. This page lists alternatives for converting HDF5 files into netCDF. So we need to know. I know, how to read netcdf data into matlab and due to the size of this file (3gb) maltab is saying out of limit (array exceeds maximum array size preference. NCDF_CONTROL: Performs miscellaneous NetCDF operations. Working with NetCDF files in Matlab. open netcdf Software - Free Download open netcdf - Top 4 Download - Top4Download. how to read netcdf file in R. ncid = netcdf. open(source) opens source, which can be the name of a NetCDF file or the URL of an OPeNDAP NetCDF data source, for read-only access. NCDF_VARDEF: Define the variables to be used in the file. Before you can do any plotting with in, you need to unpack the data. The netCDF4 module is available from the Python Package Index (PyPi). Open the netCDF file (). I will use Chl a data as an example, but it works with any variable contained in the NetCDF file. You can use it free as a NetCDF file viewer. I know that ArcGIS can open & display, however most of the times the results are not good, since the structure of the netcdf files is always different. ncdfto open the le, then call get. EXTERNL int nc_create (const char *path, int cmode, int *ncidp) Create a new netCDF file. txt','r'. Basics of opening NetCDF files with Python. You're trying to open a. The particular data set that you are referencing is not organized in such a way that Global Mapper can read it. ncview is a visual browser for netCDF format files. This recipe shows you how to open a NetCDF file in QGIS. According to the UniData NetCDF page : "NetCDF (network Common Data Form) is an interface for array-oriented data access and a library that provides an implementation of the interface. NETCDF_OPEN - unable to open existing NetCDF file. NetCDF data files are a great way to share oceanographic data, and they are the primary format supported by the OOI program for data delivery (in addition to. A python library that allow to use one or multiple NetCDF files in a transparent way through polimorphic methods. Browses file using the EPIC and COARDS conventions. Appel's C++ implementation is a complete read/write interface for netCDF-4, but can also be used as an alternative to the older netCDF-3 C++ interface, to write classic-format netCDF-3 files as well as. NETCDF file you've received through an email attachment or a file on your hard drive, but your computer won't let you do it. A NetCDF layer must be created in the ArcMap table of contents before NetCDF raster bands can be exported. cdl and open it in a text editor and study the structure. Here is an example of very basic fortran program that can be used to read a netcdf file, create or modify a variable and create a new netcdf file that is similar to the. Example - Reading a netCDF file with F90 To read a netCDF file into a f90 program when you have no information about the size or names of the variables, the order of the library calls to use is as follows: NF90_OPEN ! open existing netCDF dataset NF90_INQUIRE ! find out what is in it. Here is an example of how to read and write data with Unidata NetCDF (Network Common Data Form) files using the NetCDF4 Python module. nc > precip. NCDF_DIMID: Returns the ID of a NetCDF dimension, given the name of the dimension. If you cannot open your CDF file correctly, try to right-click or long-press the file. Re: Large NetCDF file problems Pablo: Although probably not ideal, my general approach when dealing with NetCDFs is first extract/convert them to a more friendly format -- gdalUtils should work on a Windows box to accomplish this (let me know if it doesn't). NetCDF variables that contain a variable into NetCDF file and has variable in your NetCDF file is rainfall you have a NetCDF file with 4 no default value. You can get a list of all the variables in a file by using the listvariables. Certainly, NetCDF can also be built with both PnetCDF and PHDF5 enabled. They are particularly useful to manage the outputs of numerical models. The netCDF4 module is available from the Python Package Index (PyPi). This recipe shows you how to open a NetCDF file in QGIS. NetCDF (Network Common Data Form) is a set of software libraries and self-describing, machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data. When using the Historical Hurricane Tracks tool, the left side bar allows you to query storms by their location, name, year, etc. How to Fix Problems Opening NETCDF Files Conduct a Malware Scan of Your NETCDF File. 1, and if DAP support was enabled when ncdump was built, the file name may specify a DAP URL. In addition to simply opening the file, information about the file and its contents is read in and stored in the returned object, which is of class ncdf4. Click the Variable drop-down arrow and choose a variable from the list. Reading The PRECipitation REConstruction data set (PREC) and create a single NetCDF file Publicado em 29 de Fevereiro de 2016 por pedrotildes The The PRECipitation REConstruction data set (PREC) (Precipitation Monthly Anomalies Over Global Land & Oceans from 1948-current) is a set of (until now) 69 annual precipitation files, from 1948 to 2016. There are two cases in which you might want to add a variable to a netCDF file. For example, to open the netcdf file 'Jones_climatology. When using PnetCDF underneath, the files must be in the classic formats (CDF-1/2/5). When used with the -h option, ncdump can be used to show the translation from the DAP DDS data model to the NetCDF data model. initsz sets the initial size of the file. Please look into NetCDF_Improvements for information regarding these and other improvements to the GDAL NetCDF driver. Sometimes certain analysis may require data in a tabular format (as opposed to the gridded format of NetCDF). The syntax is different and the following script is then rather outdated. Coding using XArray Data Import. The CDF-5 file format, an extension of CDF-2, supports more data types and allows users to use 64-bit integers to define large dimensions, attributes, variables (> 2B array elements). Panoply is a cross-platform application that runs on Macintosh, Windows, Linux and other desktop computers. Update: For those using Matlab version 2010b and higher a netcdf set of routines is now incorporated in the distribution. Update Your NOAA-Related Hardware Device Drivers. Writing your own NetCDF decoder or encoder To decode NetCDF files there is an official NetCDF Application Programming Interface ( API ) with interfaces in Fortran, C, C++, and Java available from Unidata. You must remember that if your variable is a 3D i. NetCDF Viewer can not plot NetCDF files but NetCDF Viewer can show the content of any NetCDF files, variables, dimensions, attributes, and global attributes. Define the dimensions - one per dimension. Data If you are seeking information about file extensions , then you are in the right place at right time. Thiss will tell us the data type, dimensions, data units, and other information about the dataset. Making a netCDF raster layer. ncid is a netCDF file identifier returned by netcdf. NCDF_CLOSE: Closes an open NetCDF file. To open the file: import netCDF4 f = netCDF4. Note that you can not change the dimensionality of any existing variables, but you can change the values. We first look how we can read this file on a laptop with little memory. Had to compile netCDF using ifort and icc from source. 1 is the same as NetCDF Extractor V2. Note: Use the Search window to locate the Make NetCDF Raster Layer tool. You must remember that if your variable is a 3D i. Creation of arraysgreater than this limit may take a long time and cause MATLAB to become unresponsive. The nc_open function opens a connection to the netCDF file, but does not read all the data in the file into memory. ggplot2 offers a geom_sf function that could help too. pprint(f) Get a list of class attributes. There are many free and open-source software packages readily available for visualizing and manipulating netCDF files. 0, but it has an API for plotting contour and heatmap graphs and a button for exporting all extracted data without getting average. com currently lacks support for compound types that have variable-length members or variable-length types of a compound base type, for example. Reinstall Ferret. 1, the file format for parallel I/O operations is restricted to HDF5. These tools will reduce the need for the GEOS-Chem user community to rely on IDL (and GAMAP), which can be prohibitively expensive for some user groups. 10, released 2019-09-30. NetCDF-4 allows you to store attributes, variables, and dimensions in hierarchical groups, which look much like a UNIX file system. We will select the variable and time range of interest, and export the data to a GeoTIFF so that we can continue the analysis in R or other geospatial software. Open the netCDF file (). [ncl-talk] How to convert netcdf to grib format Guido Cioni guidocioni at gmail. netCDF uses ns file type for its internal purposes and/or also by different way than common edit or open file actions (eg. NetCDF data files are a great way to share oceanographic data, and they are the primary format supported by the OOI program for data delivery (in addition to. If you find you do need to download copies of the NetCDF data files (because you want your own local copies for some reason), the best way is to remove the DODS-specific part from the URL, and then select the file of interest from the list. This is not much use since most NetCDF files use the "classic" format. Obtain Another Copy of Your NETCDF File. It is amazing that I can find a compliance checker for NetCDF files at the CF-Metadata web page, but I have problems to find any tools or methods to create such a file. Click the Variable drop-down arrow and choose a variable from the list. NetCDF is a data format for storing array-oriented scientific data, particularly geophysical data. Click Make NetCDF Raster Layer in the returned list to open the tool. I'm restricted to using MS SDS and C#. The files are named in a logical format, like this: January79, February79, Marts79, April79, May79, June79, July79, August79, September79, October79, November79, December79, January80 and so on. Create a netCDF file with some extra parameters controlling classic file cacheing. NetCDF Viewer can not plot NetCDF files but NetCDF Viewer can show the content of any NetCDF files, variables, dimensions, attributes, and global attributes. It is amazing that I can find a compliance checker for NetCDF files at the CF-Metadata web page, but I have problems to find any tools or methods to create such a file. Therefore, Agrimetsoft has developed the new version of NetCDF Extractor (NetCDF Extractor V. Define the dimensions - one per dimension. To create a new netCDF file, use nc_create instead. In the NetCDF menu, select «Open», "Filter file", browse to the desired NetCDF file and select the variables you want to read. In fact, this tool is the nc file viewer, nc file converter, and nc file extractor. But when I open the attribute table for the layer I just generate, there is nothing there (and also nothing shows on the map). ncname is the name of the neCDF file, while dname is the name of the variable that will be read in. Hallo, Does someone know how to import a complete Dataset of NetCDF files. The file ncdf_rdwr. Multi-File Dataset (MFDataset) uses file globbing to patch together all the files into one big Dataset. I hope now you are able to open netCDF. SeaDAS does not read the L3b (binned data) files. nccopy: nccopy -k classic nc4_file. The current tool in Python to do this is the netCDF4 package; Use ncview. This allows ncdump to print out data sources from DAP servers. Investigate a NetCDF file. This program is “a collection of command line Operators to manipulate and analyse Climate and NWP model Data” (quote from the website). Multi-field support off. I'm trying to read a big netcdf file (445 Mb) using netcdf4-python. Before attempting to open an NETCDF file, you'll need to determine what kind of file you are dealing with and whether it is even possible to open or view the file format. You cannot play with the data until you read it. The -netcdf option writes the grid values to a specified file in netcdf format using COARDS convention for the Latitude-Longitude, Mercator and Gaussian grids and the CF-1. Operations to write netCDF data (no attributes) 1. GitHub Gist: instantly share code, notes, and snippets. It is very easy to open netCDF files in MATLAB. ncid = netcdf. 0 convention for Lambert and Polar stereographic projection grids. Click Make NetCDF Raster Layer in the returned list to open the tool. Visit for free, full and secured software's. It can be convenient to read netcdf files in your fortran scripts, or to create fortran scripts to treat large netcdf files. # Open a connection to the first file in our list nc - nc_open(paste0("data/", flist[1])) You can get a description of what’s inside the nc file using print(nc) which dumps info to your console. Add this folder to the path to make the binaries available everywhere. nc file arcgis, how to view netcdf files, open netcdf file in arcmap. The first, and most common way, is when you are creating a new netCDF file. Documentation Wiki. Answer: Files which are given the. Don't try to load it completely, you can only load a part of the variable which you want. The resulting graphic is shown below. Be aware that the current GrADS release cannot handle a netCDF. Upload your NETCDF data (widely used in software like QGIS) and convert them by one click to CSV (WKB, LatLong) format (widely used in software like MS Excel, LibreOffice and OpenOffice). A Complete Example with Unlimited Dimensions The following example shows how to create a netCDF file, populate it with data, read data from the file, and make a simple plot from the data. Update Your NOAA-Related Hardware Device Drivers. In addition to simply opening the file, information about the file and its contents is read in and stored in the returned object, which is of class ncdf4. Therefore, Agrimetsoft has developed the new version of NetCDF Extractor (NetCDF Extractor V. nc netCDF file. Here are some links that I pulled up. The Copernicus Marine Environment Monitoring Service provides Full, Free and Open Access to Data & Information related to the Global Ocean and the European Seas. nc) How to download Sea Surface. netcdf File in Panoply ! Launch Panoply. It is amazing that I can find a compliance checker for NetCDF files at the CF-Metadata web page, but I have problems to find any tools or methods to create such a file. Useful tools. That is, you have a root group called "/", which then can have any number of groups under itr. Install Climate Data Operator (CDO) with NetCDF, GRIB2 and HDF5 support. Return to the Resources page. The nccopy command copies a netCDF file from one binary format to another, optionally changing compression and chunksize settings. A Complete Example with Unlimited Dimensions The following example shows how to create a netCDF file, populate it with data, read data from the file, and make a simple plot from the data. This module is able to read and create netCDF files, but does not support the newer netCDF4 format. The current tool in Python to do this is the netCDF4 package; Use ncview. Compiling is ok, but something is wrong when running. Use open_dataset or open_mfdataset to read a single or multiple NetCDF files, and store it in a DataSet called DS. so far I know how to read one file with ncread but I couldnt't find out how to import the entire set of the files. netCDF uses ns file type for its internal purposes and/or also by different way than common edit or open file actions (eg. A quick tour of netCDF data NetCDF (network Common Data Form) is a file format designed to support the creation, access, and sharing of scientific data. Hi fellows, as my first post I want to share with you a way to download, extract and plot the NetCDF data (extension. You'll run the Make NetCDF Raster Layer tool to create a raster layer using the tmin variable from the temperature. how can i extract precipitation data from netcdf file using fortran Showing 1-18 of 18 messages. 1) ncdump an existing valid netCDF file: ncdump precip. A netCDF file not only contains the "data" but also a description of the variables, the creation history, and any other important attributes about the data set. netcdf file(s) you will be making into a Plot. I am able to open files one by one but unable to open all by using a loop. If the file is open for write access (mode='w', 'r+' or 'a'), you may write any. As you say it worked fine from the site you quoted. nc') At this point, it is possible to use print to check the file: print(f) or. 0) for extracting many files at the same time. I will use Chl a data as an example, but it works with any variable contained in the NetCDF file. nc) How to download Sea Surface. VRML file names are given the extension,. Welookups Tutorial WEB Generic example: [code]import numpy as np from scipy. Python - NetCDF reading and writing example with plotting. mode Either NC_WRITE, to open the file for writing, or NC_NOWRITE, to open the file read-only. If the structure of the netCDF file is already known, the inquiry routines do not need to be called—only NCDF_OPEN, NCDF_ATTGET, NCDF_VARGET, and NCDF_CLOSE would be needed. NetCDF allows dimensions to be either fixed length or UNLIMITED length. As you say it worked fine from the site you quoted. Visit for free, full and secured software’s. I have a NetCDF file of environmental data. This article will describe the use of Geospatial Data Abstraction Library (GDAL) tools for converting SNODAS binary files to NetCDF or GeoTIFF. To create a new netCDF file, use nc_create instead. This routine opens an existing netCDF file for reading (or, if write=TRUE, for writing). The current tool in Python to do this is the netCDF4 package; Use ncview. Other grid templates and projections are not supported yet. The recommended way to store xarray data structures is netCDF, which is a binary file format for self-described datasets that originated in the geosciences. Global Mapper only supports a small subset of data sets stored in the netCDF format. mzXML provides a standard container for ms and ms/ms proteomics data and is the foundation of our proteomic pipelines. NetCDF files can be converted to ASCII or text or even to MS Excel using e. Don't try to load it completely, you can only load a part of the variable which you want. Nonetheless, the NetCDF file format is the standard in the oceanography field. 2) Based on above, write a shell script to convert each of your 365 x 50 = 18250 precip text files into valid cdl format. Read here what the NC4 file is, and what application you need to open or convert it. Learn more about symbolizing data. Requirements If you want to use this library on any GNU/Linux or OSX system you just need to execute:. This tutorial will take you through how to convert a NetCDF (or other raster/gridded data) to an R data frame, which can then used for analysis or saved as a CSV file. 0 convention for Lambert and Polar stereographic projection grids. To import nc data to python workspace, we will need to install necdf4 package in python. Click Make NetCDF Raster Layer in the returned list to open the tool. zip Start ArcMap and create a NetCDF raster layer from the NetCDF file. The nc_open function opens a connection to the netCDF file, but does not read all the data in the file into memory. Usually when you create a netCDF file, you specify what variables you want the file to contain. nc and assigns a file number to it. com Mon Feb 13 03:50:12 MST 2017. NetCDF-4 is essentially a special case of the HDF5 file format. Step 1: Open the file ncid1 = netcdf. This recipe shows you how to open a NetCDF file in QGIS. Coding using XArray Data Import. ncid is a netCDF file identifier returned by netcdf. mode: The mode flag may include NC_WRITE (for read/write access) and NC_SHARE as in nc_open(). vandelst(at)ssec. #1 Post by lliu » Mon Oct 14, 2013 1:44 am I have run into a problem regarding a real tidal experiment and I describe the problem in the follow. This guide is intended to help Intel® Fortran Compiler customers build the NetCDF software libraries on Intel® architecture systems running Linux* or Mac OS*. NETCDF file to analyze. Panoply plots geo-referenced and other arrays from netCDF, HDF, GRIB, and other datasets. This allows ncdump to print out data sources from DAP servers. If you want to only use the netCDF-4 API to copy any netCDF-4 file, even those with variables that use arbitrary user-defined types, that's a difficult problem. Other grid templates and projections are not supported yet. The operators are primarily designed to aid manipulation and analysis of gridded scientific data. Note: Use the Search window to locate the Make NetCDF Raster Layer tool. Once the file is open, GrADS commands work as usual. However, the generated file does not conform to the netCDF-4 classic model due to groups. This command will write out a defined variable varname into a NetCDF formatted data file. The nc_open function opens a connection to the netCDF file, but does not read all the data in the file into memory. Choose your. Global Mapper only supports a small subset of data sets stored in the netCDF format. The NCL function addfile can be used to read, create or overwrite a NetCDF file. grd files in netcdf-4 format / netcdf driver does not support netcdf-4 files with default chunking and bottom-up format / hdf5 driver crashes when H5Sget_simple_extent_ndims() returns negative value #5389 NetCDF: gdal_translate unable to translate EASE-GRID file properly #5802 gdal HDF5 NetCDF plugin bug #5873. Code Examples Two example files that demonstrate the use of the netCDF routines can be found in the examples/doc/sdf subdirectory of the IDL distribution. The operators are primarily designed to aid manipulation and analysis of gridded scientific data. For example, you can convert the sample NASA AIRS L3 HDF-EOS2 file into a NetCDF-3 file with the h4tonccf tool. How to Fix Problems Opening NETCDF Files Conduct a Malware Scan of Your NETCDF File. to install/execute/support an application itself, to store application or user data, configure program etc. vandelst(at)ssec. netcdf viewer 1. However, the generated file does not conform to the netCDF-4 classic model due to groups. Once uncompressed you can open the dataset in Panoply. For one, you don't open netcdf files with a compiler, but. Opening and closing files before and after each write is way too time-consuming, so I open all the files at the beginning of the simulation and close them at the end. Such data sets are referred to as "MC" (multi CDF) data sets. It will be a lot easier with the newer ncdisp , ncinfo and ncread functions though (11a). The netCDF4 module is available from the Python Package Index (PyPi). To create a new netCDF file, use nc_create instead. The actual value chosen by the NetCDF library might not correspond to the input value. open(source) opens the source for read-only access and returns a NetCDF identifier in ncid. This tutorial will take you through how to convert a NetCDF (or other raster/gridded data) to an R data frame, which can then used for analysis or saved as a CSV file. nc', and create a file object 'f ', you would use. nc') By default, a file is opened with read-only access. Re: How to check if a file is indeed a NetCDF file? To : Paul van Delst < paul. import pprint pprint. 0, but it has an API for plotting contour and heatmap graphs and a button for exporting all extracted data without getting average. Let me know if I can be of further assistance. CDF file is a netCDF Data. That is, you have a root group called "/", which then can have any number of groups under itr. The nc_open function opens a connection to the netCDF file, but does not read all the data in the file into memory. A NetCDF layer must be created in the ArcMap table of contents before NetCDF raster bands can be exported. In my experience GIS's dont handle 3D/temporal data well. I am trying to extract data from a NetCDF file using Microsoft's Scientific Data Set libraries (SDS). NetCDF is a data format for storing array-oriented scientific data, particularly geophysical data. To create a new netCDF file, use nc_create instead. nc) How to download Sea Surface. According to the UniData NetCDF page : "NetCDF (network Common Data Form) is an interface for array-oriented data access and a library that provides an implementation of the interface. NETCDF4_CLASSIC: Data is stored in an HDF5 file, using only netCDF 3 compatible API features. It supports command line use on both Windows and Unix as well as use directly as a Java library. Converting a grads file to NetCDF can be done using the following command:. close(ncid)) as in my above examples. The current tool in Python to do this is the netCDF4 package; Use ncview. Don't try to load it completely, you can only load a part of the variable which you want. Answered By: mathtalk-ga on 16 Dec 2002 16:28 PST Hi, chemguy-ga: The NetCDF library (source code and binary) is freely available for downloading at Unidata, a multidisciplinary program center sponsored by the National Science Foundation. 1990-present. nc' file I provided is only the year 1980 and I have several other files from 1981-1985, 1986-1990, etc. The NetCDF-4 format adds many new features related to compression and multiple unlimited dimensions (we'll discuss both of these points later). The entire file and each dataset within the file is accompanied by a number of descriptive fields called attributes. netcdf', etc. That is, you have a root group called "/", which then can have any number of groups under itr. netCDF uses ns file type for its internal purposes and/or also by different way than common edit or open file actions (eg. I am able to open files one by one but unable to open all by using a loop.