Results 201 to 210 of about 2,732 (249)

Extraction of ground control points (GCPs) from synthetic aperture radar images and SRTM DEM

International Journal of Remote Sensing, 2006
Qualified ground control points (GCPs) are crucial in the geolocation of a remotely sensed image. If a region has no published map, the geographical coordinates of GCPs must be obtained indirectly. Although these can be re‐constructed from a synthetic aperture radar (SAR) image using sensor position and velocity, this conventional method does not ...
Hyung-Sup Jung, Joong-Sun Won
exaly   +2 more sources

Role of Ground Control Points (GCPs) in Integration of Terrestrial Laser Scanner (TLS) and Close-range Photogrammetry (CRP)

, 2019
The need for GCPs is increasingly more important with the increase in higher accuracy requirements and increase in user expectations. GCPs (Ground control points) are necessary for orientation and placement of photographs and 3D models in the spatial coordinate system, and they play a key role in co-registration of two point clouds.
Yogender, Raghavendra S., Kushwaha S. K. P.   +2 more
openaire   +2 more sources

USING GROUND CONTROL POINTS (GCP) AND UAV POIND CLOUD PROCESSIN� IN WATER MANAGEMENT

SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings, 2022
Using aerial vehicles without pilot (UAV-unmanned aerial vehicle) or Drone has seen a rapid development, over the last decade, in order to obtain spatial information of the Earth's surface. This scientific paper was realized for the Hydrotechnical Node of Costei, from Timis County and has as purpose the processing of aerial images, obtained from a ...
Adrian Smuleac, Laura Smuleac, Raul Pascalau, George Popescu, Adina Horablaga   +4 more
openaire   +1 more source

Accuracy assessment of 3D model reconstructed from UAV images by the distribution of the ground control points (GCPs)

AIP Conference Proceedings
Alwan Imzahim A
exaly   +2 more sources

Extraction of ground control points (GCPs) from synthetic aperture radar image using DEM

IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004, 2004
Synthetic aperture radar (SAR) data have serious geometric distortions caused by inherent side looking geometry and are usually corrupted by speckle noises so that it is difficult to identify ground control points (GCPs). The location of the pixel in a given SAR image can be derived from the knowledge of sensor position and velocity.
Sang-Hoon Hong, Hyung-Sup Jung, Joong-Sun Won, Hong-Gab Kim   +3 more
openaire   +1 more source

An automatic ground control point matching based on GCP chip database for remote sensing images

2009 International Conference on Image Analysis and Signal Processing, 2009
With the rapid development of remote sensing technology and comprehensive applications, there are more demands on precision and efficiency for remote sensing digital orthographic maps (DOM). Selecting and positioning ground control points (GCP) is one of the most important parts of geometry correction to produce the DOM.
Q. H. Chen, X. G. Liu, W. Gao, T. L. Liu
openaire   +1 more source

Standardization of the Shape of Ground Control Point (GCP) and the Methodology for Its Detection in Images for UAV-Based Mapping Applications

2019
The challenge of georeferencing aerial images for an accurate object to image correspondence has gained significance over the past couple of years. There is an ever-increasing need to establish accurate georeferencing techniques for Unmanned Aerial Vehicles (UAVs) for tasks like aerial surveyance of mines/construction sites, change detection along ...
Aman Jain, Milind Mahajan, Radha Saraf
openaire   +1 more source

Comparative Study of UAV Mapping with and without Ground Control Points (GCPs)

International Journal of Geoinformatics
Unmanned Aerial Vehicles (UAVs) have transformed geospatial data acquisition, yet the necessity of Ground Control Points (GCPs) for spatial accuracy versus operational efficiency remains a critical topic of investigation. This study presents a comparative analysis of UAV mapping accuracies achieved with and without the integration of GCPs. Conducted at
openaire   +1 more source

Assessing the accuracy of river channel bathymetry measurements using an RTK rotary-winged Unmanned Aerial Vehicle (UAV) with varying Ground Control Point (GCP) number and placement

2020
<p>Previous studies have established the ability to map river channel bathymetry accurately in clear water, shallow wadeable streams using imagery from Unmanned Aerial Vehicles (UAVs), Structure-from-Motion (SfM) photogrammetry and the application of refraction correction.
Ian Maddock, Josie Lynch
openaire   +1 more source

Pemetaan Topografi Di Wilayah Perumahan Griya Paniki Indah Dengan Menggunakan Fotogrametri Serta Perbandingan Ketelitian Akurasi Dengan Ground Control Point (GCP)

2022
Pemetaan Fotogrametri/Unmanned Aerial Vehicle (UAV) merupakan pemetaan yang dapat menjelajah ke wilayah yang cukup luas dalam waktu yang relafif singkat, sehingga menjadikan drone adalah alternatif yang efektif, murah dan aman apabila dimanfaatkan untuk memetakan wilayah dibandingkan menggunakan metode konvensional lainnya.
Kembuan, Geraldo J. F., Pandey, Sisca V., Lefrandt, Lucia I. R.   +2 more
openaire   +1 more source