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Using inertially-aided real-time kinematic technology as a land-based mapping tool
 Manfred D. M. Sever  Frank A. Artés Applanix Corporation, 85 Leek Crescent Richmond Hill, Ontario, Canada. L4B 3B3 Tel: 905-709-4600, Fax: 905-709-6027 Email: msever@applanix.com, artesf@applanix.com Abstract Airborne mapping techniques do not lend themselves well to mapping roads in dense urban canyons and tree canopy areas. Detailed and accurate road mapping information, especially that required for GIS databases, can often only be obtained by land-based methods. However, GPS satellite shading and multipath reception can also complicate accurate and reliable land-based GPS positioning in these types of areas. The Applanix POS LV is an aided inertial navigation system designed for precise position and orientation measurements for survey and vehicle control applications. Utilizing IARTK (Inertially Aided Real-Time Kinematic) technology, POS LV provides continuous, robust, and reliable position and orientation data in difficult GPS environments. The fully integrated Applanix POS LV system was test driven in a mobile mapping campaign in Toronto, Canada, and the results generated were compared to those obtained using a stand-alone DGPS system. The POS LV’s IARTK configuration provided a significant improvement in overall position accuracy despite frequent GPS signal loss. In addition, the results indicated that a stand-alone GPS system cannot provide useful position data in environments that compromise GPS signal reception. Conclusions suggest that land-based positioning systems utilizing inertial technology, such as the Applanix POS LV with GPS and DMI (distance measurement indicator) aiding, are capable of delivering position and orientation data necessary for the rapid and efficient production of maps and GIS database information. |