Results 191 to 200 of about 2,518 (219)
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Direct georeferencing of airborne pushbroom images
Journal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A/Chung-kuo Kung Ch'eng Hsuch K'an, 2015Direct georeferencing (DG) for orthoimage production based on collinearity equations has emerging as a standard photogrammetric operation. In this paper, the basic idea of DG is realized and refined with 19 self-calibration parameters for rectifying airborne pushbroom hyperspectral images collected using the intelligent spectral imaging system (ISIS ...
Ching-Kuo Yeh, Victor J.D. Tsai
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Theory and reality of direct georeferencing in national coordinates
ISPRS Journal of Photogrammetry and Remote Sensing, 2008This paper focuses on the transformation of the sensor's exterior orientation parameters obtained by direct georeferencing (DG) to national reference frames and their subsequent projection for mapping purposes. The required steps are explained and the emphasis is put on the minimization of distortions arising from the curvature of the earth and the ...
Jan Škaloud
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Impact of vertical deflection on direct georeferencing of airborne images
Survey Review, 2014 This paper is aimed at analysing the influence of the vertical deflection (DOV) in direct georeferencing (DG) of image data from an aerial digital frame camera. Without considering the value of the DOV, a systematic error is involved in the determination of the point position.
PEPE, MASSIMILIANO +2 more
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Approximate direct georeferencing in national coordinates
ISPRS Journal of Photogrammetry and Remote Sensing, 2006Abstract Direct georeferencing has gained an increasing importance in photogrammetry and remote sensing. Thereby, the parameters of exterior orientation (EO) of an image sensor are determined by GPS/INS, yielding results in a global geocentric reference frame.
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Direct georeferencing of airborne LiDAR data in national coordinates
ISPRS Journal of Photogrammetry and Remote Sensing, 2013Abstract The topographic mapping products of airborne light detection and ranging (LiDAR) are usually required in the national coordinates (i.e., using the national datum and a conformal map projection). Since the spatial scale of the national datum is usually slightly different from the World Geodetic System 1984 (WGS 84) datum, and the map ...
Yongjun Zhang, Xiang Shen
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Accurate direct georeferencing of aerial imagery in national coordinates
ISPRS Journal of Photogrammetry and Remote Sensing, 2015In aerial photogrammetry, data products are commonly needed in national coordinates, and, in practice, the georeferencing is often performed in the required national map projection frame directly. However, as a map projection frame is not Cartesian, some additional corrections are necessary in the georeferencing process to take account of various map ...
Xiang Shen +2 more
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Photogrammetric Record, 2022 GNSS/INS applications are being developed, especially for direct georeferencing in airborne photogrammetry. Achieving accurately georeferenced products from the integration of GNSS and INS requires removing systematic errors in the mobile mapping systems.
Mohammad Bagherbandi +2 more
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Direct Georeferencing of Ultrahigh-Resolution UAV Imagery
IEEE Transactions on Geoscience and Remote Sensing, 2014Micro-unmanned aerial vehicles often collect a large amount of images when mapping an area at an ultrahigh resolution. A direct georeferencing technique potentially eliminates the need for ground control points. In this paper, we developed a camera-global positioning system (GPS) module to allow the synchronization of camera exposure with the airframe ...
Darren Turner +2 more
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Resection method for direct georeferencing in Terrestrial Laser Scanner
Journal of Mining and Earth Sciences, 2022Recently, the direct georeferencing method has been increasingly used in Terrestrial Laser Scanner (TLS). This method has the benefit of saving time, but the low accuracy is a great difficulty to use. This paper proposed a possible approach for direct georeferencing with high accuracy using the resection method.
Dung Trung Pham +5 more
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A Comparison of Direct Georeferencing and GPS-supported AT
2006 IEEE International Symposium on Geoscience and Remote Sensing, 2006One of the major tasks in the evaluation process of photogrammetry is the determination of the exterior orientation. Direct Georeferencing (DG) and GPS-supported AT provide new methods for this task in addition to conventional AT. A test flight was performed with two methods DG and GPS supported AT.
D. Guo, L. Wu, Q. Li, J. Wang, X. Zheng
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