Big Data: when the size and performance requirements for data management become significant design and decision factors for implementing a data management and analysis system. For some organizations, facing hundreds of gigabytes of data for the first time may trigger a need to reconsider data management options. For others, it may take tens or hundreds of terabytes before data size becomes a significant consideration.

The Geospatial Web (aka the GeoWeb) is a rapidly evolving Web 2.0 market of innovative data and software applications--including location-based services, social software, and even augmented reality--for both the web and mobile devices. Propelled by the new location-aware iPhone, the GeoWeb is hurtling into the mainstream. This special issue lays out the new generation of geo products and services, identify the major players, and show how your business can leverage the power of Where 2.0.