Results 211 to 220 of about 12,562 (250)

A precise direct georeferencing system for UAVs

2014
A georeferencing of the collected data is required for many unmanned aerial vehicle (UAV)-based remote sensing applications in the fields of surveying, precision farming, infrastructure inspection or geography. This georeferencing can generally be done indirectly using ground control points, or directly using an on-board sensor system.
Eling, Christian, Klingbeil, Lasse, Kuhlmann, Heiner   +2 more
openaire   +1 more source

Direct georeferencing of airborne LiDAR data in national coordinates

ISPRS Journal of Photogrammetry and Remote Sensing, 2013
Abstract 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   +1 more source

Theory and reality of direct georeferencing in national coordinates

ISPRS Journal of Photogrammetry and Remote Sensing, 2008
This 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   +1 more source

Direct georeferencing of ADS40 using calibrated POS data

2011 International Conference on Multimedia Technology, 2011
The ADS40 is airborne three-line-push broom imaging sensor integrated with POS, which developed by L. H. Corporation. Due to the accuracy of POS, especially the accuracy of orientation cannot meet the requirement for large scale mapping. This paper provides mathematical model for POS data calibration using a few GCPs.
null Li ran, null Sun ke
openaire   +1 more source

Accurate direct georeferencing of aerial imagery in national coordinates

ISPRS Journal of Photogrammetry and Remote Sensing, 2015
In 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   +1 more source

A Comparison of Direct Georeferencing and GPS-supported AT

2006 IEEE International Symposium on Geoscience and Remote Sensing, 2006
One 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
openaire   +1 more source

Approximate direct georeferencing in national coordinates

ISPRS Journal of Photogrammetry and Remote Sensing, 2006
Abstract 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   +1 more source

Adaptive multi-image direct georeferencing for unmanned aerial vehicle application

2017 IEEE 2nd Information Technology, Networking, Electronic and Automation Control Conference (ITNEC), 2017
Due to the flexibility and unmanned property, unmanned aerial vehicle (UAV) has been used on a wide range of applications and conditions recently. In the large number of possible applications, real time and accurate georeferencing is very important. Direct georeferencing with out ground control points is defined as the direct measurement of the imaging
Hongguang Li, Chunlei Liu, Zepeng He
openaire   +1 more source

Error model of direct georeferencing procedure of terrestrial laser scanning

Automation in Construction, 2017
Abstract Processing of raw point cloud data obtained as a result of terrestrial laser scanning (TLS) sometimes involves georeferencing, i.e. transformation of point cloud data to an external coordinate system. This paper focuses on defining the error model of point positions obtained through a “station-orientation” procedure of direct georeferencing.
Pandzić, Jelena, Pejić, Marko, Božić, Branko, Erić, Verica   +3 more
openaire   +2 more sources

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, PREZIOSO, Giuseppina, SANTAMARIA, Raffaele   +2 more
openaire   +2 more sources