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The application of ultrawideband signals and large apertures provides a high detailed radar image, where a vast majority of terrain objects may be considered as spatially distributed. The examples of such spatially distributed targets are different types of agricultures, forests, infrastructural objects, which could be recognized against the background of vegetation or bare soils. Another example of a spatially distributed target are ships and glaciers against the background of the water surface. The main purpose ...

A problem of presence or absence small changes determining on the reflecting surface during the observation session is often occurring while solving many problems of space monitoring. Examples of such problems are the ice situation forecasting, emergencies forecasting and detecting (i.e., fires, floods, landslides, mudflows, etc.), detection of forest areas unauthorized logging, forecasts of agricultural yields, analysis the sea surfaces, and many others. For reliable detection in reviewed situations, they recomme...

One of the largest fires in the Croatian history, so called ?mother of all fires?, broke out on Monday, 17. July 2017 in the area between Split and Omis (Croatia). The fighting with the firestorm lasted until 18. July when the situation was put under control, and on 19. July, the recovery of the affected area started. The classification showed that the burned area was 40670 square kilometers large. Vegetation indices obtained from aerial or remote sensing imagery are very simple and effective methods for quantitat...

The possibility of the application of satellite bathymetry methods was studied in order to obtain quantitative parameters of the depth of the coastal part of the Astana reservoir (Kazakhstan). The relevance of the research is associated with the application of new technologies for the operational evaluation of changes in the level of the water line and the volume of the reservoir, which supplies Nur-Sultan, the capital of Kazakhstan, with drinking water. The initial data were satellite images with different resolu...

The key objective of modern vision systems is the problem of a signal class determining since the signal features are completely determined by the type of underlying surface relative to which the observation is made. In spite of the fact that at present there are a huge number of analytic methods for the solving the indicated problem, in the vast majority of tasks based on natural images, capacities of solving it are characterized by the probabilities of erroneous and proper decisions. The exact analytic probabili...

Geological lineament analyses were performed on the segment of East Anatolian Fault Zone between Doganyol (Malatya) and Celikhan (Ad?yaman) in eastern Turkey. The Eastern Anatolian Fault Zone is one of the important intra-continental strike-slip faults in the Alpine-Himalayan Orogenic Belt. A detailed analyses along the fault segment using satellite images (LandSAT 8 OLI, ASTER image) and digital elevation models (DEMs) were brought out that the fault segment presents geological lineament and morphotectonic struct...

Background: This article is devoted to the question of correction system implementation. The correction system is necessary to provide the ability of autonomous navigation the unmanned airborne vehicle. We can see a lot of examples of terrain landform correction systems and ?synthetic aperture radar? ? based systems. But in the case of using information about lengthened objects, we have a great opportunity to provide robustness objects, which we can reliably cross during our flight. Nevertheless, these objects sho...

Aim of the study is to unveil how the choice of software and cameras influences the quality of 3D models. There were compared three different softwares: (1) Pix4D (2) Agisoft Phtoscan, and (3) Visual SFM with dense cloud module Yasutaka Furukawa's CMVS tool and four different cameras (1) Canon EOS 760D, (2) Canon EOS 600D, (3) Canon Ixus 185, and (4) Sony Xperia Z1 smartphone camera D5503. Cameras represent different price segments and technical parameters. The photos were taken with all the cameras from identical...

Monitoring short temporal changes in intra-urban vegetation areas will become very important as the proportion of urban areas continue to increase. Intra-urban variations in vegetation abundance influence environmental conditions by selective reflection and absorption of solar radiation and by sequestration of pollutants. This research investigates the hypothesis that it should be possible to use easily accessible multispectral Landsat 8 images to track intra-urban vegetation, and obtaining sufficient quality info...

Currently, there is still a current trend to preserve the historical heritage of the Slovak Republic for future generations. Preservation of monuments is currently carried out by the Monuments Board of the Slovak Republic, whose central body is the Ministry of Culture. It is often necessary to create documentation that is suitable for presentation and technical purposes. The main aim of the paper is to create a 3D model of the church in the village of Kosicke Olsany. From the measurements was obtained the coordina...

This article is devoted to the questions of the reliability and the accuracy of the invented algorithm. Background: The implementation of autonomous navigation system for unmanned airborne vehicle is required for the reliable navigation in case of the instability of the satellite navigation system. Traditionally this problem is solved by the terrain landform navigation system, also the synthetic aperture radar navigation systems could be used as the correction system for the inertial navigation system. Nevertheles...

The effective precision crop products' production is impossible without modern contact and remote optical control methods of a physiological and phytosanitary condition of crops. At Agrophysical research institute (Russia, St. Petersburg) the technique of definition of homogeneous technological areas is developted by using the means of unmanned aerial vehicles of helicopter (Geoskan-401) and plane (own development) types. Also the test plots which are used as the standards with the known parameters of a physiologi...

A supervised classification algorithm has been developed for automated sea ice retrieval in some regions of the Arctic seas. Sentinel-1 Extra Wide images were utilized as input for a Neural Network (NN)-based algorithm. Synthetic aperture radar (SAR) data has several features significantly affected on the microwave backscatter from sea ice. In this paper, an approach to improve data quality is proposed. Since different sea ice types can have similar backscattering coefficients, the extracted SAR texture features i...

This paper deals with the calculation of rock volume located in the hard-to-reach terrain of a water dam. During the reconstruction of the safety slip of the water dam, it was necessary to remove this rock and to determine the volume extracted at a particular stage of the construction. In addition, calculations of the total amount of rock above the given coordinates of the reconstruction project were solved. The reason was the need to know the amount of rock that still needs to be excavated to get the builders to ...

Spatial 3D-reconstruction applications today use mostly fully automated methods based on Structure from Motion (SfM) and Multi-View Stereo (MVS) algorithms. In these cases it is emphasized that the camera calibration parameters can be approximate, i.e. downloaded from EXIF data or even avoided, to facilitate the use of uncalibrated cameras in everyday measuring tasks. However, the accuracy of the spatial reconstruction of the model, recorded with an uncalibrated camera can be significantly reduced. Especially if t...

In the context of the current climate change faced by mankind, a series of phenomena are emerging, which can pose problems to both several environmental aspects, including among others biodiversity and agricultural crops. Drought is a regional phenomenon which, through its impact on agriculture, can also have a bad influence on the economy. Apple farming, through its spreading area and its importance in human nutrition and health is also affected by this aspect. Based on high temperatures and a reduced amount of p...