ISA 2012 workshop report: a report on the Fourth International Workshop on Indoor Spatial Awareness (Redondo Beach, California - November 6, 2012)

With recent progress of mobile devices and indoor positioning techniques as well as indoor data modeling methods, indoor space is now considered as an extension of outdoor for seamless geospatial application such as pedestrian navigation, indoor routing services, and indoor space analysis. With such a background and strong demands from the industry, the international workshop on Indoor Spatial Awareness (ISA) has been established as a regular scientific event since 2009. The first workshop was held in conjunction with the conference of MDM (Mobile Data Management) in Taiwan and has joined the ACM SIGSpatial workshop from the second edition in 2010. Since the first workshop, it has served as an important forum bringing together researchers, developers, and practitioners who work on different topics of indoor spatial awareness and inspiring interdisciplinary discussions in all relevant aspects.