This book focuses on the study of the remarkable new source of geographic information that has become available in the form of usergenerated content accessible over the Internet through mobile and Web applications. The exploitation, integration and application of these sources, termed volunteered geographic information (VGI) or crowdsourced geographic information (CGI), offer scientists an unprecedented opportunity to conduct research on a variety of topics at multiple scales and for diversified objectives.

The Handbook is organized in five parts, addressing the fundamental...