Print Email Facebook Twitter Role of Tie Points in Integrated Sensor Orientation for Photogrammetric Map Compilation Title Role of Tie Points in Integrated Sensor Orientation for Photogrammetric Map Compilation Author Khoshelham, K. Faculty Aerospace Engineering Department Optical and Laser Remote Sensins Section, Earth Observation and Space Systems Date 2009-03-01 Abstract Direct measurement of exterior orientation parameters has been a challenge in photogrammetry for many years. Direct sensor orientation using a calibrated GPS/INS system can potentially eliminate the need for ground control points and aerial tiiangulation, and consequently, result in a great reduction in the cost and time of aerial photogrammetry. Previous studies have shown that, compared to conventional aerial tiiangulation, direct sensor orientation yields larger errors in the image and object space. It has also been shown that including a number of tie points within an integrated orientation approach can result in a reduction of errors in the image space. In this paper, the influence of the number and distribution of tie points on integrated orientation is investigated. Experiments with various numbers of tie points regularly as well as randomly distributed are presented. Results indicate that an increase in the number of tie points up to one point per model results in a considerable reduc¬tion of the errors in the image space. Subject OA-Fund TU Delft To reference this document use: http://resolver.tudelft.nl/uuid:9218b117-bb2e-4495-9b72-d13e7b0f3948 Publisher American Society for Photogrammetry and Remote Sensing Source Photogrammetric Engineering & Remote Sensing, Vol. 75, no.3, 2009, pp. 305-311 Part of collection Institutional Repository Document type journal article Rights PERS, OA title Files PDF Khoshelham2009_PERS1.pdf 680.5 KB Close viewer /islandora/object/uuid:9218b117-bb2e-4495-9b72-d13e7b0f3948/datastream/OBJ/view