Book excerpt: Geographic information systems (GIS) use a complex mix of cartography, statistical analysis, and database technology to provide everything from web-based interfaces, such as Bing Maps and Google Maps, to tracking applications for delivery services. With GIS, author Peter Shaw guides you through it all, starting with a detailed examination of the data and processes that constitute the internals of a GIS. He surveys a selection of commercial and open-source software packages, detailing the strengths and weaknesses of each so you can choose one that suits your own GIS development. Shaw even provides instructions for setting up a spatially enabled database and creating a complete .NET GIS application. Complete with downloadable code samples, GIS is the one resource you need to map your world. This updated and expanded second edition of Book provides a user-friendly introduction to the subject, Taking a clear structural framework, it guides the reader through the subject's core elements. A flowing writing style combines with the use of illustrations and diagrams throughout the text to ensure the reader understands even the most complex of concepts. This succinct and enlightening overview is a required reading for all those interested in the subject . We hope you find this book useful in shaping your future career & Business.