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Design of Pravčická brána 3D model and its integration with 2.5D TIN terrain model
Brýdl, Ivo ; Brůha, Lukáš (advisor) ; Lysák, Jakub (referee)
The main goal of this thesis is to design integrated model containing a three-dimensional representation of Pravčická brána rock arch and 2.5D TIN model of surrounding terrain. Point cloud from airborne lidar measurements has to be classified into ground and non-ground features. The ground points are the basis of the TIN terrain representation. Second part of this thesis is focused on methods for reconstructing 3D surface from given points set retrieved with ground-based lidar measurement. The thesis describes the process of meshing point cloud with Poisson surface reconstruction. Finally, these two models are oriented and translated to real coordinates in order to form integrated hybrid model covering part of České Švýcarsko National Park.
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Automatized map similarity analysis using shape invariants
Soukup, Matěj ; Bayer, Tomáš (advisor) ; Lysák, Jakub (referee)
Automatized Map Similarity Analysis Using Shape Invariants Abstract This diploma thesis is focused on using shape similarity measures for automatized map comparison. Maps can vary e.g. in the reference scale, coordinate system, rotation, degree of generalization, map content or accuracy of depiction of individual objects. The main part of the thesis deals with finding identical objects on both map layers and their matching using shape invariant turning function and other methods based on object location. These methods are tested on specific maps and compared with each other. The specific combination of methods is proposed and used for matching objects. After that the maps are compared to each other from several different perspectives. The proposed algorithm is implemented in Python programming language. Keywords: map similarity, shape similarity, similarity measures, turning function
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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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Historical Topographic Database of Luční bouda and Surroundings Based on Early Maps and Ortohphotos
Chytilová, Barbora ; Lysák, Jakub (advisor) ; Suchá, Renáta (referee)
HISTORICAL TOPOGRAPHIC DATABASE OF LUČNÍ BOUDA AND SURROUDINGS BASED ON EARLY MAPS AND ORTOHPHOTOS Abstract The bachelor thesis aims to creating the digital topographic database of the Luční Bouda region in Krkonoše capturing its development in time. The database contains early maps and orthophotos data taken within the area. Among crucial archival spatial data covered, in the database we can count maps of Stabilní katastr, III. military mapping, aerial snapshots from 1936, Map of the Czechoslovakia from 1937, Map of State in scale 1 : 5 000 as well as orthophotos taken in year 1953 and later on. The theoretical part of the thesis includes introducing the area of interest, hictorical cartography, actual data and theoretical information involving digital topographic database creation with time constituant. The research deals with project itself followed by procedure of filling the database with data. The conclusion involves brief discussion on the development of the area in time. Key words Luční bouda, Krkonoše, digital topographic database, early maps, orthophotos
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Position accuracy assessment of underground water courses in ZABAGED
Matyáš, Michal ; Lysák, Jakub (advisor) ; Šára, Pavel (referee)
Positional accuracy assessment of underground water courses in ZABAGED Abstract The aim of this bachelor thesis is to provide a comprehensive view of underground water courses through the eyes of a topographer and a cartographer with an emphasis on the evaluation of the position representation of this phenomenon. The first part of the thesis is devoted to the detailed introduction to ZABAGED datasets and to the research of other foreign topographic databases with an emphasis on the representation and display of underground water courses on topographic maps of medium and large scale. In the second part of the thesis, there are presented five basic methods of comparison of positional accuracy of lines in geoinformation systems. The practical part of the thesis includes a proposal of typology of underground water courses, as a comprehensive concept of different types of underground water courses, which is used for the correct evaluation of the position accuracy analysis on the selected relevant sample of the underground water courses in ZABAGED in the last part of this work. Keywords: underground water course; positional accuracy; topographic database
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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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Accessibility analysis of Prague public transport stops
Kapusta, Michal ; Štych, Přemysl (advisor) ; Lysák, Jakub (referee)
This document concerns with the network analysis of accessibility and space inclusion of the Prague public traffic stops. The main theme of the background research is accessibility and network analysis problematics. During analysis, the ESRI ArcGIS 9.3 software was used to test the time accessibility zone hypothesis as well as households' and companies' distribution. The map of spatial inclusion was also created for separate types of transports as well as for all public transport stops in Prague as well. The hypothesis of space public transport stop inclusion area increase away from center was proven to be true, however the dependancy of the households allocation in relation to the city center was not proven. The similiraity between households and companies allocation was found not to be fully provable. key words: accessibility, space inclusion, network analysis, Prague public city transport, ESRI ArcGIS 9.3
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