Results 61 to 70 of about 647 (152)

Geomorphic Effectiveness of an Extreme Flood in a Mountain River: Evidence From Pre‐ and Post‐Event Surveys in a Subtropical Region of Southern Brazil

Hydrological Processes, Volume 40, Issue 5, May 2026.
The extreme flooding of April 2024 caused a complete “geomorphic reset”, resulting in a 24% widening of the channel and a transition to critical or supercritical flow regimes. The energy of the event broke through the stable armouring layer, reducing the armouring ratio from 7.9 to 4.9 and intensely removing fine sediments from the subsurface.
Gabriel Augusto Feyh, Jean Paolo Gomes Minella, Eno Darci Saatkamp, Lidiane Buligon, Gustavo Henrique Merten, Felipe Bernardi, Cristiano Carvalho da Silva, Angelo Garcia Costa, Alice Prates Bisso Dambroz   +8 more
wiley   +1 more source

Evaluation of positioning error-induced pixel shifts on satellite linear push-broom imagery [PDF]

, 2015
Georeferencing is one of the major tasks of satellite-borne remote sensing. Compared to traditional indirect methods, direct georeferencing through a Global Positioning System/inertial navigation system requires fewer and simpler steps to obtain exterior
Jia, Guimin, Wang, Xiangjun, Liu, Feng, Li, Yang, Wei, Hong   +4 more
core   +1 more source

Accuracy and Limitations of Tools for Analyzing Meander Migration: Consequences of Bend Dynamics and Analysis Interval

Water Resources Research, Volume 62, Issue 5, May 2026.
Abstract Channel migration in meandering rivers is commonly quantified by analyzing change over time in positions of river‐channel centerlines extracted from aerial photographs or satellite images. Although several tools have been developed to estimate migration based on centerline changes, the accuracy of these tools has not been rigorously evaluated.
Billy Hales, İnci Güneralp, Bruce Rhoads, Chelsy Salas   +3 more
wiley   +1 more source

Georeferencing of close range photogrammetric data

, 2011
The paper presents some general approaches for indirect georeferencing of close range photogrammetric data being acquired for various applications by the imaging systems of different types either independently or in integration. Various digital metric or
Podlasiak, P., Bujakiewicz, A., Zawieska, D.   +2 more
core  

Comparative Assessment of the Effect of Positioning Techniques and Ground Control Point Distribution Models on the Accuracy of UAV-Based Photogrammetric Production

Drones
Unmanned aerial vehicle (UAV) systems have recently become essential for mapping, surveying, and three-dimensional (3D) modeling applications. These systems are capable of providing highly accurate products through integrated advanced technologies ...
Muhammed Enes Atik, Mehmet Arkali
doaj   +1 more source

A qualidade cartográfica dos resultados do laserscanner aerotransportado [PDF]

, 2004
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Civil.O presente trabalho de pesquisa objetivou desenvolver um método de avaliação
Brandalize, Maria Cecília Bonato
core  

DIRECT AND INDIRECT GEOREFERENCING WITH A LIGHT-WEIGHT UAV AND AN RTK UAV

International Symposium on Applied Geoinformatics 2021, 2022
Wafa M.A. Thiab, Dursun Zafer Seker
openaire   +1 more source

System calibration for direct georeferencing

, 2002
Within the last years extensive tests were done to investigate the accuracy performance of integrated GPS/inertial systems for direct georeferencing in airborne photogrammetric environments.
D. Stallmann, M. Cramer
core  

Calibration and Direct Georeferencing Analysis of a Multi-Sensor System for Cultural Heritage Recording

, 2012
A large amount of cultural heritage monuments and sites exist distributed worldwide that require easy to use, cheap and fast sensor orientation tools for recording, georeferencing, surveying and mapping. Ground control points are usually required on site
Hernández López, David, Cabrelles López, Miriam, Felipe García, Beatriz, Lerma, José Luis   +3 more
core   +1 more source

Empirical Evaluation and Simulation of GNSS Solutions on UAS-SfM Accuracy for Shoreline Mapping

Drones
Uncrewed aircraft systems (UASs) and structure-from-motion/multi-view stereo (SfM/MVS) photogrammetry are efficient methods for mapping terrain at local geographic scales.
José A. Pilartes-Congo, Chase Simpson, Michael J. Starek, Jacob Berryhill, Christopher E. Parrish, Richard K. Slocum   +5 more
doaj   +1 more source