Results 81 to 90 of about 12,566,784 (250)

MULTI-GNSS PPP: An Alternative Positioning Technique for Establishing Ground Control Points

International Journal of Environment and Geoinformatics, 2020
Traditionally, ground control points (GCPs) are utilized to determine absolute image orientations indirectly in aerial triangulation. For a long time, differential and relative GNSS (Global Navigation Satellite System) positioning techniques have been ...
Berkay Bahadur, Metin Nohutçu
doaj   +1 more source

Influence of flight altitude and control points in the georeferencing of images obtained by unmanned aerial vehicle

European Journal of Remote Sensing, 2021
This study aimed to explore the influence of flight altitude, density, and distribution of ground control points (GCPs) on the digital terrain model (DTM) in surveys conducted by unmanned aerial vehicles (UAVs).
Lucas Santos Santana, Gabriel Araújo E Silva Ferraz, Diego Bedin Marin, Brenon Dienevam Souza Barbosa, Luana Mendes Dos Santos, Patrícia Ferreira Ponciano Ferraz, Leonardo Conti, Stefano Camiciottoli, Giuseppe Rossi   +8 more
doaj   +1 more source

The Influence of Ground Control Points (GCPs) for Digital Elevation Models (DEMs) Using UAVs

Unmanned aerial vehicles are a modern technology for collecting data for aerial surveying to produce high-resolution digital elevation models (DEMs). This accuracy is achieved using ground control points (GCPs), which are specific locations on the ground
Kamal M. Gamal, Ahmed S. Elshrkawy, Ahmed Elshesheny, Osama M. Moussa   +3 more
core   +1 more source

Integrating SfM, LiDAR and TLS for High‐Resolution Monitoring of Palsa Surface Changes and Degradation Dynamics

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Understanding fine‐scale surface changes is crucial for quantifying ecosystem dynamics and detecting landscape changes. Palsas, comparably small peatland elevations with an ice‐rich permafrost core, undergo natural cycles of growth and degradation. They can also serve as indicators of climate change in subarctic regions. Because they typically
Alexander Störmer, Timo Kumpula, Pasi Korpelainen, Benjamin Burkhard   +3 more
wiley   +1 more source

Higher geometric accuracy using GPS derived ground control points for LULC analysis

, 2021
Georeferencing in remote sensing imagery provides an integrated validation on the land use land cover (LULC) changes of urban growth. Geometic accuracy in georeferencing can be increased using Global Positioning System (GPS) derived ground control points
Mohd Yusoff, Mariney, Abdullah, Jamalunlaili, Yasin, Muhammad Yazrin, Mohd Noor, Nisfariza, Mohd Noor, Norzailawati   +4 more
core  

DataSheet1_Using existing infrastructure as ground control points to support citizen science coastal UAS monitoring programs.docx

, 2023
Recent publications have described the ability of citizen scientists to conduct unoccupied aerial system (UAS) flights to collect data for coastal management.
Lucas F. Rabins (14819161), Ethan J. Theuerkauf (3779899), Erin L. Bunting (14819164)   +2 more
core   +1 more source

Validation of a Particle Image Velocimetry Algorithm Through Comparative Field and Laboratory Analysis

River Research and Applications, EarlyView.
ABSTRACT Flow velocity measurement is fundamental to hydrological and hydraulic studies, providing essential data for streamflow estimation and river dynamics analysis. Traditional in situ methods like propeller gauges and acoustic Doppler current profilers are accurate but intrusive and labour‐intensive, while non‐intrusive image processing methods ...
Ghazaleh Nassaji Matin, Gareth Bradbury, Alan Puttock, Kirsty Frith, Diego Panici   +4 more
wiley   +1 more source

EVALUATION OF ASTER GDEM V3 USING ICESAT LASER ALTIMETRY [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
We have used a set of Ground Control Points (GCPs) derived from altimetry measurements from the Ice, Cloud and land Elevation Satellite (ICESat) to evaluate the quality of the 30 m posting ASTER (Advanced Spaceborne Thermal Emission and Reflection ...
C. C. Carabajal, J.-P. Boy
doaj   +1 more source

Digitalisasi Pemetaan Topografi menggunakan Alat Drone serta Perhitungan Ketelitian dengan Ground Control Point (Gcp)

Jurnal Teknik Sipil Terapan
Perkembangan teknologi telah mendorong penggunaan drone untuk pemetaan topografi yang hemat biaya dan waktu. Pada penelitian yang dilakukan di area pengembangan perumahan Citraland Winangun, dilakukan penentuan kondisi topografi dan keakuratan proses pemetaan menggunakan drone dengan Ground Control Point (GCP).
Anastasya G.O Piyoh, I Gede Yohan Kafrain, Fenny Moniaga   +2 more
openaire   +1 more source

Ground truth extraction from LiDAR data for image orthorectification

, 2008
The availability of high accuracy GCPs (ground control points) and DEMs (digital elevation models) becomes the key issue for successful implementation of an image orthorectification project.
Liu, Xiaoye, Zhang, Zhenyu, Zhenyu Zhang, Xiaoye Liu   +3 more
core   +1 more source