Book Image

QGIS 2 Cookbook

By : Alex Mandel, Víctor Olaya Ferrero, Anita Graser, Alexander Bruy
Book Image

QGIS 2 Cookbook

By: Alex Mandel, Víctor Olaya Ferrero, Anita Graser, Alexander Bruy

Overview of this book

QGIS is a user-friendly, cross-platform desktop geographic information system used to make maps and analyze spatial data. QGIS allows users to understand, question, interpret, and visualize spatial data in many ways that reveal relationships, patterns, and trends in the form of maps. This book is a collection of simple to advanced techniques that are needed in everyday geospatial work, and shows how to accomplish them with QGIS. You will begin by understanding the different types of data management techniques, as well as how data exploration works. You will then learn how to perform classic vector and raster analysis with QGIS, apart from creating time-based visualizations. Finally, you will learn how to create interactive and visually appealing maps with custom cartography. By the end of this book, you will have all the necessary knowledge to handle spatial data management, exploration, and visualization tasks in QGIS.
Table of Contents (19 chapters)
QGIS 2 Cookbook
About the Authors
About the Reviewers

Opening a NetCDF file

The NetCDF data is a data format, which is designed to be used with array-oriented scientific data, and it is frequently used for climate or ocean data, among others. This recipe shows you how to open a NetCDF file in QGIS.

How to do it…

NetCDF files are raster files, and they can be opened using the Add raster layer menu. Select NGMT NetCDF Grid for CDF as the file format in the file selection dialog that you will see, and select the file from the example dataset. Click on OK.

How it works…

The proposed NetCDF file contains a single variable, which is opened as a regular raster layer.

There's more…

A NetCDF file can contain contain multiple layers. In this case, QGIS will prompt you to select the one that you want to add from the ones contained in the specified file.

When only one layer is available, it is opened directly, as in the previously described example.

The NetCDF Browser plugin

Another way of opening NetCDF files is using the NetCDF Browser plugin. Select the Manage and install plugins... menu to open the plugin manager. Go to the Not installed section and type netcdf in the search field to filter the list of available plugins. Select the NetCDF Browser plugin and click on Install plugin to install it. Close the plugin manager.

The plugin is now installed, and you can open it by selecting NetCDF Browser in the Plugins menu:

Select the NetCDF file in the upper field. The other fields will be updated with the content of the selected file. Select a layer from the available ones and click on Add to add the layer to your QGIS project.