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Data for the Creation Orienteering Maps
Panchártek, Jan ; Plánka, Ladislav (referee) ; Hanzl, Vlastimil (advisor)
This thesis is about using airborne laser scanning data for making maps for Orienteering. In this thesis were used altimetry data DMR 4G and DMR 5G. These data are provided by ČUZK. The control measuring was made in choosen area to verify the accuracy. In this thesis is described procedure of data collection and their treatment. The results of this thesis are two illustrations of the orienteering maps.
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Detection of anthropogenic terrain features in the summit area of the Luční and Studniční hora mountains (Krkonoše) with use of airborne laser scanning data
Krusová, Anna ; Lysák, Jakub (advisor) ; Potůčková, Markéta (referee)
The thesis focuses on detection of micrographic features using airborne laser scanning data. The aim of the thesis is to propose a novel method for detecting terrain features and to identify and describe terrain objects corresponding to anthropogenic interventions in the arctic-alpine tundra region in the summit area of the Luční and Studniční hora mountains in the Krkonoše Mountains. Based on existing studies, a new detection method of specific micrographic features was proposed by combining two types of data, i.e. point cloud and its raster representation. Initially, polygon approximations of terrain objects were derived from a digital terrain model, and their spatial delineation was further refined locally using point clouds. The output provides the most complete and accurate polygon delineation of the terrain features to date, considering the available data, the specific characteristics of the area, and in comparison to previously conducted studies. The proposed algorithm has identified hundreds of additional terrain features compared to the reference data. However, this number includes false positive features, which need to be manually eliminated. Key words: airborne laser scanning, micrographic features detection, archaeological prospection, digital terrain model, local relief model, Krkonoše...
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Utilization of airborne laser scanning data for the detection of agrarian forms of relief in the Giant Mountains
Jebavá, Lucie ; Kupková, Lucie (advisor) ; Potůčková, Markéta (referee)
Utilization of airborne laser scanning data for the detection of agrarian forms of relief in the Giant Mountains Abstract This thesis deals with the possible use of airborne laser scanning data for the detection of agrarian forms of relief in the Giant Mountains. The main research method is the analy- sis of the digital terrain model and digital surface model in the area of the Giant Mountains in the software ArcGIS 10.0. The analysis is based on specific functions in ArcGIS software (Slope, Curvature) as well as on combinations of rasters of shaded reliefs which led to the detection of further agrarian forms. To verify the precision of agrarian forms detection field verification was used. Based on verification and accuracy assessment the results can be designated as a very satisfactory. The Administration of the Giant Moun- tains National Park can use the research results to quantify the agrarian forms of relief, to improve their protection and, possibly also for further research and management. Keywords: airborne laser scanning, agrarian forms of relief, anthropogenic geo- morphology
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Application of airborne laser scanning in forests
Sedláčková, Oldřiška ; Potůčková, Markéta (advisor) ; Lysák, Jakub (referee)
Application of airborne laser scanning in forests Abstract The main aim of this work is to determine a laser pulse penetration through forest stands according from airborne laser data acquired at the beginning of a vegetation growth. Another goal is to evaluate different methods of mean tree height determination. In the first part the technology of airborne laser scanning (ALS) and its application in forest inventory is introduced. The use of ALS data for generating digital terrain models in forested areas is evaluated. A project of a new digital elevation model of the Czech Republic is introduced. Furthermore, methods of data processing are described and characterization of areas of interest in Dobruska and Sobotka is done. Comparison of a laser pulse penetration through different forest types and evaluation of a suitable method for mean tree height determination are main outputs of this work. Keywords: airborne laser scanning, digital terrain model, laser pulse penetration, mean tree height.
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Location accuracy improvement of watercourses based on airborne laser scanning data
Peterková, Tereza ; Brůha, Lukáš (advisor) ; Tippner, Aleš (referee)
The object of this thesis is to propose the method of location accuracy improvement and longitudinal profile of watercourses using the data of airborne laser scanning. In the thesis the watercourses are seen as valley lines where i tis possible to use the method of terrain brek-lines detection to determine their location. The proposed method processes DMR in the formo f filter point swarm and i tis based od the intersection of planes approximation the slopes adjoined to the watercourse. Primarily the thesis focuses on narrow watercourses in deeply placed valleys and the method is adapted to it. At the same time the proposed method successfully deals with the different accuracy of the primary estimation of the explored watercourse. The end of the work presents and evaluates the results of the used method and the obtained data of the Labe spring region in Krkonoše mountains.
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Analysis of forest canopy density based on textural features of hight resolution imagery and airborne laser scanning data
Bromová, Petra ; Potůčková, Markéta (advisor) ; Hájek, Filip (referee)
Analysis of forest canopy density based on textural features of high resolution imagery and airborne laser scanning data Abstract The objective of this thesis is to assess the forest canopy density in the Šumava Mountains, Czech Republic. The spruce forests in this area have been suffering from the bark beetle outbreak for almost 20 years resulting in a mixture of dead and young trees, mature forest stands and peat bogs. The canopy density was evaluated using a very high spatial resolution panchromatic imagery and low point density LiDAR, combined with an object oriented approach. The classification based on three GLCM texture measures (contrast, entropy and correlation), which were derived from the image objects, resulted in a kappa index of accuracy of 0.45. Adding the information from the LiDAR data, the accuracy of the classification improved up to 0.95.
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Utilization of additional information on the pulse for ALS data classification in rugged terrain
Poláková, Tereza ; Lysák, Jakub (advisor) ; Potůčková, Markéta (referee)
Utilization of additional information of the pulse for ALS data classification in ragged terrain Abstract The diploma thesis deals with airborne laser scanning filtering problem in sandstone landscape which is characterized by ragged terrain and in our country also by dense vegetation that makes difficult to transit laser pulse to terrain that can lead to lower accuracy of created DTM. In the first part the basic filtering algorithm that are systematic divided into several groups are described. The emphasis is also put on theoretic problems which we have to deal with during the filtering of laser scanner data acquired in sandstone landscape. The main goal of the thesis is to suggest changes in one of the existing algorithm to additional information of the pulse (mainly amplitude and width of the pulse) be used, and to test this method over the real data. At the end the results of the method and its implementation are critically evaluated. Keywords: airborne laser scanning, point cloud segmentation, point cloud classification, sandstone landscape, DTM
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Enhancement of DTM in Sandstone Landscapes Using Precise Registration of Airborne Laserscanning Data
Holman, Lukáš ; Lysák, Jakub (advisor) ; Dušánek, Petr (referee)
DTM Improvement in Sandstone Cliffs Relief using precise Co-registration of Airborne Laser Scanning Data Abstract The topic of this thesis is to design innovation of methodology improvement of digital terrain models from airborne laser scanning data in sandstone rocks rugged relief. Theoretical part of this thesis presents the Project GeNeSiS and New Elevation Model Project of the Czech Republic Territory, in which the test datasets were acquired. Simultaneously this section describes in detail methods of co-registrations datasets from strip adjustment to 3D least squares matching method, which have been published until now. In practical part of the work the Pravčická brána model region is introduced firstly. The focus of this section lays on description of new methodology for co-registration and classification of point clouds using spatial query. Co-registration of point clouds, respective detection transform parameters in this thesis is solved by introducing ground control areas. For each such region displacement and rotations in each axis are detected which subsequently determines the global transformation key. Innovation of the thesis lies in the fact that for DTM improvement there is sufficient only one point cloud. The second (and possibly others) point cloud is classified by presented algorithm...
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Visualization of DTMs made from airborne laser scanning data
Picek, Jan ; Lysák, Jakub (advisor) ; Dušánek, Petr (referee)
Visualization of digital terrain models made from airborne laser scanning data Abstract The aim of this study is to evaluate opportunities of 2D visualization of digital terrain models made from airborne laser scanning data. Each method is described in detail with other parameters and approach. The focus is put on methods which are useful for the topographic mapping (f. e. orienteering maps) and for cartographic visualization. All this methods are tested for different data and type of relief (plain, mountainous, rock city, area with negative shapes). The aim of study is to find the optimal method for each type of relief which expresses most of typical features. There are shown methods on the maps for orienteering sports for detection of different object from airborne laser scanning data. Keywords: airborne laser scanning, digital terrain model, data visualization, hillshading
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Optimalizace technologického procesu zpracování dat leteckého laserového skenování pro výpočet zásob lesních porostů
Patočka, Zdeněk
Airborne laser scanning has already become an essential part of forest inventories in the Nordic countries and in Canada. However, its wider practical forestry application in the Central European countries is awaiting. In the first part of this thesis, a procedure for modelling of the basic stand variables, especially forest stand volume, was designed using an area-based approach. Not only linear regression was used for modelling but also machine learning (k-nearest neighbor algorithm, Random Forest, Support Vector Machine and neural networks). In the second part, the thesis deals with biomass estimation using the area-based approach and with comparison of the empirical and semi-empirical approaches to modelling. The third part deals with leaf area index (LAI) estimation using penetration indices and LiDAR metrics. The eLAI estimated by optical method is commonly used for model fitting in overwhelming majority of scientific papers. The benefit of this study is usage of LAI derived by destruction method (directly). The thesis as a whole has shown that the airborne laser scanning is also usable in a variety of forestry applications in Central European countries.
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