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Apologies for cross-posts. Greetings, The GIS Division is organizing two special session in Error/Accuracy Assessment and LBS Privacy Issues for the 2012 ASPRS national conference in Sacramento, CA. We are now collecting abstracts for these sessions. Error/Accuracy Assessment: One of the major problems of using geo-spatial data is the availability of data and information at multiple spatial scales or resolutions and temporal scales. The end result of using multi-scale data/information is getting varying amount of error in final outcomes. In order to increase accuracy of the final product, it is imperative to know the error amount associated with final outcomes depending upon the scale used in a study. The purpose of this session is to increase awareness about sources and causes of error when using multi-scale geo-spatial data, and to introduce methods existing to reduce error or establish a functional relationship between scale and error to garner knowledge about error variance associated with scale change. Location Privacy: Advancement in geo-spatial technologies has enabled collection and generation of a large amount of geospatial data. Recently there has been an explosion of location-based services (LBS), which use these spatial data to provide location information about an individual?s or vehicle?s location accurately and precisely. Location-based services singularly do not violate personal information but by coordinating location with other types of information, such as an individual?s address, these services can provide personal information to a third party, thereby leading to location privacy violation. Given the recent popularity of location-based services (e.g., smart phones, Twitter?s location API, Google Latitude, etc.), it is imperative to understand the causes and consequences of location privacy violation both in terms of research advancements and legal implications. Papers are invited in both sessions. If you would like to contribute to this stream of sessions, please submit your abstract online ( http://www.asprs.org/ASPR-2012/Annual-Conferences/ASPRS-2012-Conference/Call-For-Abstracts-Online-Form.html ). Please note that the deadline for abstract submission is August 1, 2011. Finally, please forward this announcement to colleagues that may be interested. Additional information regarding the conference may be found at: http://www.asprs.org/Annual-Conferences/ASPRS-2012-Conference/ASPRS-Conference-2012.html If you have any question feel free to contact us: David Alvarez [log in to unmask] Mobile: (971) 225-0039 Dr Bandana Kar [log in to unmask] Phone: (601) 266-5786 We look forward to seeing everyone in 2012