Results 221 to 230 of about 4,996,434 (258)
Some of the next articles are maybe not open access.
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 Skaloud, Klaus Legat
openaire +3 more sources
Direct georeferencing of airborne pushbroom images
Journal of the Chinese Institute of Engineers, 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
openaire +3 more sources
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.
openaire +3 more sources
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, Yongjun Zhang, Qingquan Li
openaire +3 more sources
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
openaire +3 more sources
Direct georeferencing of oblique and vertical imagery in different coordinate systems
ISPRS Journal of Photogrammetry and Remote Sensing, 2014Reconstruction of 3D models through integrating vertical and oblique imagery has been studied extensively. For a 3D reconstruction, object point cloud coordinates could be calculated using direct georeferencing (DG) obtained from the direct orientation data of a GPS/INS system.
Haitao Zhao +5 more
openaire +3 more sources
Direct Georeferencing of River Boundary Images Acquired Using RTK UAV
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, 2023Soohee Han, Dongyeob Han
openaire +2 more sources
Measurement science and technology, 2021
Inexpensive and small unmanned aerial vehicles (UAVs) provide high-accuracy positional data and enable users to collect high-resolution aerial images. The analysis of images captured using UAVs in a specific reference system is traditionally accomplished
M. Zeybek
semanticscholar +1 more source
Inexpensive and small unmanned aerial vehicles (UAVs) provide high-accuracy positional data and enable users to collect high-resolution aerial images. The analysis of images captured using UAVs in a specific reference system is traditionally accomplished
M. Zeybek
semanticscholar +1 more source
Accuracy analysis of MAMS data using direct georeferencing
2012 Second International Workshop on Earth Observation and Remote Sensing Applications, 2012The conventional airborne photogrammetry is difficult to implement in some areas, such as marine, deserts, grassland and high mountain regions where the installation of ground control point (GCP) is dangerous or impossible. With the availability of integrated GPS and inertial measurement units (IMU), which are also called POS, this situation is ...
null Kuifeng Luan +7 more
openaire +1 more source
Accuracy of direct georeferencing strategies to monitor geomorphological features
2022<p>Geomorphic systems face significant changes of climate, land uses, vegetation cover and socio-demographic characteristics. In this context, the accurate monitoring of geomorphological features may be a relevant tool to understand the consequences and the risks of these changes.
Álvaro Gómez-Gutiérrez +3 more
openaire +1 more source