Preface

The open source geographic information system QGIS at version 2 now rivals even the most expensive commercial GIS software in both functionality and usability. It is also a showcase of the best geospatial open source technology available. It is not just a project in itself but the marriage of dozens of open source projects in a single, clean interface. 

Geospatial technology is not just the application of technology to geography. It is a symphony of geography, mathematics, computer science, statistics, physics, and other fields. The underlying algorithms implemented by QGIS are so complex that only a handful of people in the world understand them all.  Yet QGIS packages all of this complexity so well that school children, city managers, ...

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