Results 41 to 50 of about 2,206,953 (196)

Accuracy of 3D Landscape Reconstruction without Ground Control Points Using Different UAS Platforms

Drones, 2020
The rapid increase of low-cost consumer-grade to enterprise-level unmanned aerial systems (UASs) has resulted in the exponential use of these systems in many applications.
Margaret Kalacska, Oliver Lucanus, J. Pablo Arroyo-Mora, Étienne Laliberté, Kathryn Elmer, George Leblanc, Andrew Groves   +6 more
doaj   +1 more source

A Novel Method for Fast Positioning of Non-Standardized Ground Control Points in Drone Images

Remote Sensing, 2021
Positioning the pixels of ground control points (GCPs) in drone images is an issue of great concern in the field of drone photogrammetry. The current mainstream automatic approaches are based on standardized markers, such as circular coded targets and ...
Zheng Zhu, Tengfei Bao, Yuhan Hu, Jian Gong   +3 more
doaj   +1 more source

PRECISE AERIAL IMAGE ORIENTATION USING SAR GROUND CONTROL POINTS FOR MAPPING OF URBAN LANDMARKS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
Highly precise ground control points, which are globally available, can be derived from the SAR satellite TerraSAR-X. This opens up many new applications like for example the precise aerial image orientation.
F. Kurz, T. Krauß, H. Runge, D. Rosenbaum, P. d’Angelo   +4 more
doaj   +1 more source

Target Influence on Ground Control Points (GCPs) Identification in Aerial Images

IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium, 2020
Unmanned aerial vehicles (UAVs) are used nowadays as a standard tool to derive very high-resolution geospatial data. However, UAV payload limitation imposes the use of not such reliable hardware affecting the georeferencing precision. In the literature it is possible to find numerous studies investigating the parameters influencing UAV-based products ...
Jonás Hruska, Luís Pádua, Telmo Adão, Emanuel Peres, José Martinho Lourenço, Joaquim João Sousa   +5 more
openaire   +2 more sources

A weighted least squares solution for space intersection of spaceborne stereo SAR data [PDF]

, 2001
The use of stereoscopic SAR images offers an alternative to interferometric SAR for the generation of digital elevation models (DEMs). The stereo radargrammetric method is robust and can generate DEMs of sufficient accuracy to geocode SAR images ...
Chen, P.-H., Dowman, I.J.
core   +1 more source

The Importance of Ground Control Points In A Photogrammetric Workflow

Journal of Applied Engineering Sciences
Abstract This study investigates the optimal distribution and pattern of ground control points (GCPs) in aerial photogrammetric projects. Aerial triangulation (AT), also known as bundle adjustment, is the fundamental step in refining 3D reconstruction models and camera positions, thereby minimizing reprojection errors. The study utilizes
Iuliana Maria Pârvu, Iuliana Adriana Cuibac Picu, Ileana Spiroiu   +2 more
openaire   +1 more source

Impacts of GCP Distributions on UAV-PPK Photogrammetry at Sermeq Avannarleq Glacier, Greenland

Remote Sensing
Real-Time/Post-Processing Kinematic (RTK/PPK) technology has been widely applied in Unmanned Aerial Vehicle (UAV) photogrammetry in glaciological research. Considering that ground control points (GCPs) cannot be set on glaciers, evaluating the impacts of
Haiyan Zhao, Gang Li, Zhuoqi Chen, Shuhang Zhang, Baogang Zhang, Xiao Cheng   +5 more
doaj   +1 more source

Corridor Mapping of Sandy Coastal Foredunes with UAS Photogrammetry and Mobile Laser Scanning

Remote Sensing, 2019
Recurrent monitoring of sandy beaches and of the dunes behind them is needed to improve the scientific knowledge on their dynamics as well as to develop sustainable management practices of those valuable landforms.
Alphonse Nahon, Pere Molina, Marta Blázquez, Jennifer Simeon, Sylvain Capo, Cédrik Ferrero   +5 more
doaj   +1 more source

Feasibility Study Using UAV Aerial Photogrammetry for a Boundary Verification Survey of a Digitalized Cadastral Area in an Urban City of Taiwan

Remote Sensing, 2020
In conducting land boundary verification surveys in digitalized cadastral areas in Taiwan, possible parcel points must be surveyed. These points are employed in the overlap analysis and map registration of possible parcel points and digitalized cadastral
Shih-Hong Chio, Cheng-Chu Chiang
doaj   +1 more source

Generation of a Digital Terrain Model (DTM) Fusioning WV-2 Images and RTK-derived Topobathymetric Data

Revista Brasileira de Cartografia
Digital terrain models (DTMs) are digital elevation models (DEMs) that represent the bare ground surface. They are created by multiple sources, including satellite remote sensing, aerial photography, and ground-based surveys, and are often combined with
Elton Vicente Escobar Silva, Cláudia Maria de Almeida, Rômulo Marques-Carvalho, João Vitor Roque Guerrero, Cleber Gonzales de Oliveira   +4 more
doaj   +1 more source