期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2010
卷号：XXXVIII - Part 1
出版社：Copernicus Publications
摘要：Enhanced-positioning systems are able to support the acquisition of accurate location information using wireless technology other than the Global Positioning System (GPS). These systems have the potential to supplement GPS where GPS is unreliable. In particu- lar, enhanced-positioning systems can provide location information for navigational support and Location Based Services (LBS) in- doors and in dense urban canyons and natural environments with extreme relief. The emergence of LBS and the widespread adoption of GPS-based navigation systems are largely a result of the accuracy with which GPS devices can determine location. The purpose of this study is to validate Wireless internet access points (WiFi APs) for determining location. This research follows three steps: 1.establish the accurate WiFi position for APs; 2. plot transects of signal strength for APs; and 3. interpolate a campus signal strength map from transect data for the University of Saskatchewan campus and validate that map. This is the first step towards the develop- ment of a non-GPS location system that can provide accurate location in a fashion that can be seamlessly integrated with GPS
关键词：WLAN coverage; WiFi mapping; GPS; Wayfinding; and Indoor environment
