Results 31 to 40 of about 3,063,525 (235)

Calibration and accuracy assessment in a direct georeferencing system for UAS photogrammetry [PDF]

open access: yesInternational Journal of Remote Sensing, 2018
Unmanned aerial systems (UASs) have been already proven to be useful in fields and disciplines such as agriculture, forestry, or environmental mapping, and they have also found application during natural and nuclear disasters. In many cases, the environment is inaccessible or dangerous for a human being, meaning that the widely used technique of aerial
Petr Gabrlik   +4 more
openaire   +2 more sources

ERROR ANALYSIS FOR THE AIRBORNE DIRECT GEOREFERINCING TECHNIQUE [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Direct Georeferencing was shown to be an important alternative to standard indirect image orientation using classical or GPS-supported aerial triangulation.
A. S. Elsharkawy, A. F. Habib
doaj   +1 more source

TLS data georeferencing - error sources and effects [PDF]

open access: yes, 2017
Depending on the requirements of a certain engineering task, point coordinates obtained through terrestrial laser scanning (TLS) can be either in a scanner coordinate system (CS) or in the coordinate system of a geodetic control ...
Erić, Verica   +3 more
core   +6 more sources

A Low Cost UWB Based Solution for Direct Georeferencing UAV Photogrammetry [PDF]

open access: yesRemote Sensing, 2017
Thanks to their flexibility and availability at reduced costs, Unmanned Aerial Vehicles (UAVs) have been recently used on a wide range of applications and conditions. Among these, they can play an important role in monitoring critical events (e.g., disaster monitoring) when the presence of humans close to the scene shall be avoided for safety reasons ...
MASIERO, ANDREA   +2 more
openaire   +3 more sources

Precise topographic mapping using direct georeferencing in UAV [PDF]

open access: yesIOP Conference Series: Earth and Environmental Science, 2020
Abstract Mapping using UAV has become very popular today due to the rapid development of electronic technology. UAVs are needed to support rapid mapping activities, such as natural disaster management, SAR applications, agricultural applications and forest fire monitoring. In addition to spatial resolution, it is also needed the accuracy
A Syetiawan   +3 more
openaire   +1 more source

Accuracy Assessment of UAV Photogrammetry System with RTK Measurements for Direct Georeferencing [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
The direct georeferencing accuracy of unmanned aerial vehicle (UAV) images with real-time kinematic (RTK) measurements is a concerned topic in the community of photogrammetry.
Z. Niu   +6 more
doaj   +1 more source

Direct Action Network : against corporate globalization

open access: yes, 1999
Alternative title: [Fund raising letter]. Cosponsors include: Global Exchange, Rainforest Action Network, Ruckus Society, Project Underground, National Lawyers Guild, CISPES, IWW (Seattle), Green Party (Seattle), Earth First!
Direct Action Network (DAN)
core   +3 more sources

Direct Georeferencing by the POS AV510 Sensor [PDF]

open access: yes, 2009
Članak obrađuje osnove direktnog georeferenciranja, posebno je objašnjeno direktno georeferenciranje senzorom POS AV510. Detaljno se obrađuje kalibracija senzora, planiranje rada sa senzorom te inicijalizacija cijelog sustava.
Milas, Davor, Davor Milas
core   +1 more source

Accuracy assessment of real-time kinematics (RTK) measurements on unmanned aerial vehicles (UAV) for direct geo-referencing

open access: yesGeo-spatial Information Science, 2020
Geospatial information acquired with Unmanned Aerial Vehicles (UAV) provides valuable decision-making support in many different domains, and technological advances coincide with a demand for ever more sophisticated data products.
Desta Ekaso, Francesco Nex, Norman Kerle
doaj   +1 more source

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

open access: yesThe 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   +2 more
doaj   +1 more source

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