Results 191 to 200 of about 2,474,881 (217)

The state of the art in Blue Amazon biodiversity: Protocol for a systematic review. [PDF]

MethodsX
Farias GB, Bassoi M, Vasconcelos JB, Costa Y, Freire JN, Lucatelli J, Arangüena-Proaño M, Silva AJ, Previero M, Bordin LH, Ferreira BP, Lopes LC, Secchi ER.   +12 more
europepmc   +1 more source

Spatial Structure Explains Morphological Variation Better Than Climatic Gradients in the South American Rattlesnake (<i>Crotalus durissus</i>). [PDF]

Ecol Evol
Otani M, Costa HC, Zawadzki CH, Santana DJ.   +3 more
europepmc   +1 more source

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   +3 more sources

Error model of direct georeferencing procedure of terrestrial laser scanning

Automation in Construction, 2017
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.
Marko Pejic, Branko Bozic
exaly   +2 more sources

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Direct Georeferencing of Ultrahigh-Resolution UAV Imagery

IEEE Transactions on Geoscience and Remote Sensing, 2014
Micro-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, Arko Lucieer, Luke Wallace   +2 more
openaire   +2 more sources

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

Resection method for direct georeferencing in Terrestrial Laser Scanner

Journal of Mining and Earth Sciences, 2022
Recently, 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, Anh Tuan Nhu Nguyen, Cuong Xuan Cao, Tinh Duc Le, Canh Van Le, Cuong Sy Ngo   +5 more
openaire   +1 more source

A precise direct georeferencing system for UAVs

2014
Abstract
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

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