Unmanned aerial vehicles (UAVs) are a relatively recent, yet a very important technological innovation. With the exponential growth of affordable UAV sales in the past decade, there has been an increase of use for recreational purposes as well as use as a method of remote sensing with the support of geographic information systems in the line of scientific-research work. The purpose of this final seminar paper is to show the uses of accessible UAVs, analyze existing literature, laws and determine its advantages and disadvantages. For this purpose we created a high-resolution true ortophoto, a digital surface model and a 3D model of an object, furthermore we also focused on the application of UAV-mounted multispectral and lidar sensors, where the limiting factor is mainly the high price of the equipment. For the true ortophoto we used two UAVs and thus compared the suitability of two devices of different price categories. The advantages of the method include safety, intuitive use, relative affordability, flexibility and with existing national data comparable or even superior results. Among the disadvantages are the formal flight restrictions, limited performance of low-cost UAVs (e.g. flight time, sensor characteristics), imperfections of flight-planning software, cost of analysis programs and the needed performance of the hardware for data analysis.
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