A netCDF file includes information about the data it contains. Together, the interfaces, libraries, and format support the creation, access, and sharing of scientific data. The netCDF libraries support a machine-independent format for representing scientific data. The Network Common Data Form (NetCDF) file format was developed by the Unidata project at the University Corporation for Atmospheric Research (UCAR). NetCDF (network Common Data Form) is a set of interfaces for array-oriented data access and a freely distributed collection of data access libraries for C, Fortran, C++, Java, and other languages. Exchange for Observations and Local Knowledge of the Arctic (ELOKA).
#NC FILE VIEWER ARCHIVE#
NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).Greenland Today & Antarctic Ice Sheet Today.Click "OK" to close the property window.A part of CIRES at the University of Colorado Boulder.Optionally, after the "Min" and "Max" values have changed you can click the "Classify" button to re-classify the label values.Click the "Apply" button to trigger a recalculation of the "Min" and "Max" values.Unfortunately, QGIS displays the time values as "days since ", but you can use an online tool like to calculate the date. Each band is a combination of time and depths. For the remainder of this description we will use "Singleband pseudocolor". For a single band rendering, switch the "Render type" to either "Singleband gray" or "Singleband pseudocolor".To adjust this and select the time and depth, double click on the layer and select the "Symbology" tab on the left. By default QGIS uses a multiband symbology.Close the "Data Source Manager" window by clicking the "Close" button.Select one or more variables and click "OK". In the "Source" input field select the NetCDF file downloaded in step 1.In the popup window ("Data Source Manager").In the top menu select "Layer" -> "Add Layer" -> "Add Raster Layer".Click "OK" to close the property window and apply the changes.įor this step-by-step tutorial QGIS version 3.14.1-Pi was used.Mapping of dimension k to depth value in meters Index (k) Here is an overview of the values for this dimension depending on the selected model: And select a value for the depth (dimension "k").Select the "NetCDF" tab at the top of the window.Once the layer is processed and shown in the "Layers" tab, double-click on the layer to open the "Properties" window.Leave the optional input "Dimension values" blank, this will be adjusted in the next step.Optionally, to create a multiband raster, click the Band Dimension drop-down arrow and choose a dimension from the list.Enter a layer name in the input field "Output Raster Layer".Leave the default values for "X Dimension" and "Y Dimension".Click the Variable drop-down arrow and choose a variable from the list.For the input field "Input netCDF File" select the NetCDF file downloaded in step 1.Select the tool "Make NetCDF Raster Layer" by either using the "Search" or expanding the branch "Multidimension Tools" in the "ArcToolbox".
#NC FILE VIEWER HOW TO#
#NC FILE VIEWER SOFTWARE#
However curvilinear grids are incompatible with many off-the-shelf GIS software packages (including ArcMap and QGIS) and can be cumbersome to process with typical data science tools. This is due to the usage of a curvilinear grid in the raw eReefs data which is better suited to the modelling and execution requirements than a rectilinear grid. Note: This tutorial refers only to the NetCDF files produced by the AIMS eReefs system ( AIMS eReefs derived data) and not the raw eReefs data produced by CSIRO ( available on the NCI THREDDS server). Once downloaded, the files can be visualised and analysed using common GIS tools like ArcMap and QGIS. These files can be downloaded from the AIMS eReefs THREDDS server (for more information on how to download the files see the tutorial How to manually download derived data from THREDDS). For the visualisations on these pages the AIMS eReefs system aggregates the raw eReefs data and creates new NetCDF files (see also ArcGIS What is netCDF data?).
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