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Unmanned Aerial Vehicle (UAV) data acquisition is more flexible compared with the more complex traditional airborne data acquisition. This advantage puts UAV platforms in a position as an alternative ...
Efficient mapping from unmanned aerial platforms cannot rely on aerial triangulation using known ground control points. The cost and time of setting ground control, added to the need for increased ove...
One of the first essential steps in response to a crisis event is to provide current, precise, and rapid information about the extent of the event, the affected population and infrastructure (e.g., in...
According to the principle of space intersectioncollinearity equations and error propagation law, mathematical models of theoretical accuracy of direct georeferencing are proposed in this paper. The ...
In the years of 2004 to 2006, the Portuguese authority for forestry, the Direcção Geral dos Recursos Florestais (DGRF) ordered a digital photo flight over the whole country. The images, acqu...
There are many disasters happened because the weather changes extremely in these years. To facilitate applications such as environment detection or monitoring becomes very important. Therefore, the de...
This paper presents results from a Direct Mapping Solution (DMS) comprised of an Applanix APX-15 UAV GNSS-Inertial system integrated with a Sony a7R camera to produce highly accurate ortho-rectified i...
Direct Georeferencing of photogrammetric sensors was first pioneered on aerial film cameras in the late 1980s’ and early 1990’s in the academia. On one hand, highly accurate, decimetre lev el differen...
The high powerfulness of TLS technique for quick 3D data acquisition is extending its use to many fields. To further reduce the surveying time and to simplify all operational tasks, the TLS direct g...
Typically, inertial navigation systems assume the gravity field to be normal (ellipsoidal), meaning that the deflections of the vertical (DOV) are ignored in the gravity compensation procedure. This ...
A low-cost, easily transportable Mobile Mapping System (MMS) was designed and built to obtain the direct georeferencing parameters of images; its components are a GPS receiver, a digital compass and ...
Presently for the orthophoto projects and small-scale mapping (e.g., 1:2,500) the aerial triangulation is no longer essential while Direct Georeferencing System (DGS) is available as a complementary...
The paper describes one of the first outcomes of an Italian national research Project on inertial positioning in photogrammetry. The focus of the paper is on the quality which is attainable from dir...
Direct georeferencing is increasingly applied in connection of the photogrammetric film cameras. The prerequisite for the use of this technique is an airborne system calibration. The calibration issue...
For high quality direct georeferencing it is important that all geometric parameters influencing the rectification process are taken into account. These parameters are the exterior and interior orien...

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