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
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Using WCS


A Web Coverage Service (WCS) differs greatly in use case from the other services, but it behaves very similarly. The goal of WCS is to allow users to extract a region of interest from a large raster data that is hosted remotely. Unlike a WMS or Tiled set, WCS is a clip of the original data in full resolution and usually in the original projection. This format is ideal if you need the raster data for analysis purposes and not just visualization.

Getting ready

For this recipe, you need a WCS to connect to. Check with your data providers to see whether they offer WCS. For this recipe, we can use the OpenGeo Geoserver Demo site at http://demo.opengeo.org/geoserver/web/.

How to do it…

  1. Open a web browser and go to http://demo.opengeo.org/geoserver/web/.

  2. On the right-hand side, you'll see a list of web services that are available; right-click on WCS 1.1.1 and copy the link.

  3. In QGIS, open the WCS dialog.

  4. Select New to create a new server entry.

  5. In the boxes, perform the following:

    1. Provide a name...