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Spectral Indices as a Tool for Hop Growth Evaluation
Seidlová, Jana ; Procházka, Pavel ; Kumhálová, Jitka
The use of unmanned aerial vehicles (UAV) to monitor crop growth is nowadays a common non-invasive way how to obtain information on the current state of crops. Spectral indices derived from multispectral images obtained in the right growth stage can then serve as a good data source for agro-technical interventions and yield estimation. Hop belongs among the crops where it is possible to scan the individual growth parameters very exactly. In the year 2021, significant precipitation amounts were recorded during the growing season, when it turned out that UAVs are a very powerful tool for determining the quality of production or quantification of vegetation damage compared to the previous year (2020). It was found that the common spectral indices were possible to use for calculation leaf area, structure, vigor and chlorophyll content of hop gardens.
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Use of photogrammetric software in land consolidation
ROHÁČ, Václav
The task of this bachelor's thesis is to bring a comprehensive view of the issue of photogrammetry and photogrammetric software and their possible use in land consolidation. The work also deals with unmanned aerial vehicles. The first part of the work is a theoretical introduction to the topic of aerial photogrammetry and photogrammetric software, remote sensing in general and land consolidation. The second practical part of the work describes the preparation, data collection and subsequent implementation of a 3D model of two landscape elements using photogrammetric software Bentley ContextCapture.
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An Application of Unmanned Aerial Vehicles in Airborne Radiometry
Dědek, Jiří ; Šálek, Ondřej (advisor) ; Matolín, Milan (referee)
This thesis deals with the use of Unmanned Aerial vehicles (UAV) in radiometric survey. The main goal of this work is to review characteristics of four selected UAV and parameters of employed detectors compared to the classical airborne and ground radiometric survey. Four selected UAV were assessed, hexacopter "Kingfisher" with the detector BGO (Bi4Ge3O12) of the volume 0,2 cm3 , the octocopter "Arducopter" with the 1 cm3 CTZ (CdZnTe) detector, helicopter "Yamaha RMAXG1" with 1,8 l NaI(Tl) detector and airship "ACC15X" with 2,7 l NaI(Tl) detector. Payload capacity, detector sensitivities, flight speed, flight altitude, endurance for one charged battery or full fuel tank and wind resistance were compared among the mini- airborne instruments. The estimation of UAV radiometric data quality was derived from the sensitivity of the detectors, the flight altitude and flight speed. Estimated UAV radiometric data quality was compared to classical airborne and ground typical radiometric data quality. Three selected UAV with a certain altitude and flight speed would achieve a comparable data quality as a classical airborne survey in the altitude of 80 m and flight speed of 50 m/s. Specifically it is hexacopter "Kingfisher" with a scintillation detector D230A at altitude of 40 m and speed of 1m/s, helicopter...
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Use of unmanned aerial vehicles for precision agriculture
Fialová, Kateřina ; Matějíček, Luboš (advisor) ; Brůna, Josef (referee)
6 Abstract This bachelor thesis deals with the use of unmanned aerial vehicles (UAV) in precision agriculture. UAVs are one of the many tools used in Earth remote sensing (RS), their task is to monitor object without physical contact. Over the past 20 years, UAVs have been expanding in a wide variety of areas, massively in precision agriculture. This thesis compares the UAV with the classical means of RS and through demonstrations of real UAV deployment in selected case studies - Applications of Low Altitude Remote Sensing in Agriculture, Weed Mapping using Object-Based Analysis of UAV images, Low-altitude, high- resolution aerial imaging systems for row and field crop phenotyping and Estimating Biomass using Crop Surface Models show wide possibilities of data collection, processing and evaluation, covering the full spectrum of important information usable in precision agriculture. UAVs and their use in precision agriculture is an area that is expected to expand dynamically and which, compared to standard data collection, only positives. The greatest advantage is immense flexibility in terms of both deployment and sensor layout, high accuracy of data acquisition, ease of operation, affordability and, consequently, the availability of software specialized in processing such data. The only possible...
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Using the unmanned technology for determining the drainage systems and their failures on the agriculturally managed soils
FÜRST, Vojtěch
Objective of this dissertation was to study possibilities of detection of subsurface drainage systems by unmanned aerial vehicles. Unmanned aerial vehicles, "drones", served to military purpose in the past. Nowadays these unmanned aerial vehicles helps to map drainage on fields because it is hard to get draining plans today and a big part do not match with the actual implementation of drainage systems. We can also add that nobody cares about drainage today. Drainage drains of soaked soil and improve its harvest. Drainage facilitates transport of nutrients (nitrogen and phosphorus) to watercourses. Fields changes over time to parcels. There is description of sorting and functionality of drainage systems as well as description of malfunctions and used material in theoretical part. There is also description of unmanned aerial vehicles and a method of detection of subsurface drainage systems . Besides there is detailed description of the locality, function of drainage system and evaluation. There is description of indication of drainage on specialized aerial photography. Indications are compared with period plans. Methods of highlighting indications are applied and evaluated by programs Agisoft PhotoScan Professional and Arc GIS 10.1. Main results are photographies that demonstrate location of drainages. Using ground control points the image converted into the coordinate system.
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The military unmanned aerial vehicles as an instrument of American foreign policy in the fight against terrorism
Frumar, Josef ; Matějka, Zdeněk (advisor) ; Dubský, Zbyněk (referee)
This diploma thesis deals with the use of military unmanned aerial vehicles as a instrument of American foreign policy in the fight against terrorism. It covers their potential impact on terrorist organizations, for instance their change in behavior and warfare. It addresses the efficiency of unmanned aerial vehicles as a warfare from various perspectives, for instance in terms of number of civilian casualties or killed senior terrorist leaders. It also compares the military unmanned aerial vehicles with other alternatives of fight against terrorism and analyzes their use from strategic and tactical point of view. The last chapter indicates the potential scenarios resulting from their use for the United States, international system and security and for world itself.
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