Results 31 to 40 of about 352 (155)

EVALUATION OF SAR DATA AS SOURCE OF GROUND CONTROL INFORMATION: FIRST RESULTS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013
The high resolution imaging modes of modern SAR sensors has made SAR data compatible with optical images. SAR data offers various capabilities which can enhance the geometric correction process of optical images (accurate, direct and ground-independent
D. I. Vassilaki, C. Ioannidis, A. A. Stamos   +2 more
doaj   +1 more source

The Development of an UAV Borne Direct Georeferenced Photogrammetric Platform for Ground Control Point Free Applications

Sensors, 2012
To facilitate applications such as environment detection or disaster monitoring, the development of rapid low cost systems for collecting near real time spatial information is very critical.
Chien-Hsun Chu, Meng-Lun Tsai, Kai-Wei Chiang   +2 more
doaj   +1 more source

Assessing the georeferencing accuracy of different amount of image stripes for linear UAV projects

RUDN Journal of Ecology and Life Safety, 2020
At present, the results of photogrammetric processing of images obtained from UAVs (orthophoto mosaics, digital elevation models, etc.) are widely used for environmental studies.
Amr Mahmoud El Sheshtawy, Anatoly N. Limonov, Larisa A. Gavrilova, Mohamed A. Elshewy   +3 more
doaj   +1 more source

A SYSTEMATIC COMPARISON OF DIRECT AND IMAGE-BASED GEOREFERENCING IN CHALLENGING URBAN AREAS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Image-based mobile mapping systems enable an efficient acquisition of georeferenced image sequences, which can be used for geo-data capture in subsequent steps. In order to provide accurate measurements in a given reference frame while e.g.
S. Cavegn, S. Cavegn, S. Nebiker, N. Haala   +3 more
doaj   +1 more source

HIGH-PRECISION POSITIONING AND REAL-TIME DATA PROCESSING OF UAV-SYSTEMS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
Available micro-sized Unmanned Aerial Vehicles (UAVs) in the civilian domain currently make use of common GPS receivers and do not address scenarios where high-precision positioning of the UAV is an inevitable requirement.
M. Rieke, T. Foerster, J. Geipel, T. Prinz   +3 more
doaj   +1 more source

ANALISIS AKURASI PEMETAAN MENGGUNAKAN DIRECT GEOREFERENCING

GEOMATIKA, 2018
Banyak tantangan yang harus dihadapi ketika melaksanakan survei <br />Ground Control Point (GCP). Salah satu upaya meminimalisir jumlah titik kontrol adalah melakukan pengukuran posisi dan orientasi foto udara tanpa GCP, atau disebut direct georeferencing .
Danang Budi Susetyo, Herjuno Gularso
openaire   +1 more source

Drones and Real-Time Kinematic Base Station Integration for Documenting Inaccessible Ruins: A Case Study Approach

Drones
Ruins, marked by decay and abandonment, present challenges for digital documentation due to their varied conditions and remote locations. Surveying inaccessible ruins demands innovative approaches for safety and accuracy.
Daniele Treccani, Andrea Adami, Luigi Fregonese   +2 more
doaj   +1 more source

High‐elevation endemic plants predicted to lose habitat from changing climate in Washington State

American Journal of Botany, EarlyView.
Abstract Premise High‐elevation plants face unique challenges from potential climate change impacts that will likely require upslope migration into increasingly smaller suitable habitat. This situation is particularly acute for endemic species that by definition occupy small geographic ranges.
Nicholas L. Gjording, Erik W. Ertsgaard, David E. Giblin, Iris H. Dimpsey, Owen B. Bard   +4 more
wiley   +1 more source

THE PERFORMANCE ANALYSIS OF A UAV BASED MOBILE MAPPING SYSTEM [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
In order to facilitate applications such as environment detection or disaster monitoring, developing a quickly and low cost system to collect near real time spatial information is very important. Such a rapid spatial information collection capability has
M. L. Tsai, K. W. Chiang, Y. H. Tseng, J. Y. Rau, Y. W. Huang, C. F. Lo   +5 more
doaj   +1 more source

Reproductive stages in lowbush blueberry (Vaccinium angustifolium) occur earlier with increasing temperature

American Journal of Botany, EarlyView.
Abstract Premise Climate change is altering the timing of many plant phenological events, yet most studies focus on flowering, with less attention given to later reproductive stages such as fruit development and ripening. Vaccinium angustifolium (lowbush blueberry) is an important perennial berry species that may be sensitive to these changes.
Jenna Floyd, Elise Cadiou, Alain G. Belliveau, Zoe A. Panchen, Terrell T. Roulston, Zoë Migicovsky   +5 more
wiley   +1 more source