<P>The fourth edition of this highly regarded and successful text continues to provide a clear and accessible introduction to the world of GIS for students and professionals. With an increased focus on the practical applications of GIS, the new edition features a wealth of new multi-disciplinary case studies and examples of GIS in practice, demonstrating how it is used worldwide and within a variety of different industries.</P><P>Furthermore, the new edition has been substantially revised and updated to include coverage of the latest advances in GIS such as web and mobile applications.</P><P><I>An Introduction to Geographical Information Systems </I>is suitable for students of Geographical Information studies at all levels, from undergraduate to professionals retraining in GIS. </P>