Proceedings of the 4th ACM SIGSPATIAL international workshop on security and privacy in GIS and LBS - SPRINGL 2011 : november 1-4, 2011, Chicago, IL, USA

These proceedings contain the papers selected for presentation at the fourth edition of the ACM Workshop on Security and Privacy in GIS and LBS (SPRINGL 2011) which is being held in conjunction with the ACM SIGSPATIAL GIS conference. Geospatial data has many application areas including traffic management, homeland security, geo-marketing, and environmental crises management which motivate the research in this area. However, growing geospatial information is yet to be matched by the advances in secure geospatial information systems (GIS) and LBS. On the other hand, location information is very sensitive and also a strong quasi-identifier, which can be combined with other rich information sources to cause serious privacy leaks. Therefore ensuring security and privacy in GIS and LBS is of utmost importance which needs to be properly addressed within the research community and then to be transferred into technology. The aim of SPRINGL is to bring together the researchers working on geospatial data security and privacy to discuss and present recent advances in this area. We hope that these proceedings will serve as a valuable reference for researchers and practitioners to motivate further research and development in geospatial data security and privacy.