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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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Mapping of terrain relics of the extinct village of Palohlavy (Ralsko) using early maps and airborne laserscanning data
Turek, Matěj ; Lysák, Jakub (advisor) ; Kupková, Lucie (referee)
Bachelor thesis deals with mapping of extinct villages using old maps, orthophotos and ALS. Specifically, it focuses on the village of Palohlavy in the former MTA Ralsko. At this location, the methodology of mapping extinct villages in this military area was tested. In the course of the work, the collection and evaluation of available data sources, field measurements, proposal and fulfillment of digidal spatial database and map creation, took place. The spatial database contains elements to determine their time existence.
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Mapping relict arctic-alpine tundra vegetation from multitemporal LiDAR data
Šrollerů, Alex ; Potůčková, Markéta (advisor) ; Lysák, Jakub (referee)
The thesis focuses on metrics of vertical structure of vegetation derived from UAV LiDAR data and their use for multitemporal classification of selected species of arctic-alpine tundra in the Krkonoše Mountains. The metrics are selected based on a literature search focusing on low and shrubby stands. Random Forest algorithm and permutation feature importance, drop column importance and individual predictor performance is used to determine the suitability of metrics for distinguishing tundra vegetation. Subsequently, a fusion with multispectral data is performed and influence of the LiDAR derived variables on the refinement of classification results is determined. The use of metrics derived from a digital surface model obtained by image correlation of multispectral data is also examined. Maximum height followed by minimum height, canopy relief ratio and coefficient of variation yielded the best results, they achieved an overall classification accuracy of 67.3% for Bílá louka meadow and 62.3% for Úpské rašeliniště bog. Fusion with multispectral data led to an increase in overall accuracy up to 2 %. In case of vegetation structure derived from the digital surface model, similar results were achieved apart from higher stands. LiDAR data did not prove to be beneficial in distinguishing grass communities...
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3D data representation and visualization of blocks of buildings generated by means of aggregation generalization method
Šklíba, David ; Brůha, Lukáš (advisor) ; Lysák, Jakub (referee)
3D data representation and visualization of building blocks generated by the generalization aggregation method Abstract The bachelor thesis deals with the topic of 3D data representation and visualization. Its main objective is to automate the visualization of the result of the aggregation of LOD2 building blocks, which was performed using optimization method. In the first part, a survey of 3D building and building block generalization methods is performed, focusing on the aggregation method including the optimization problem from which the input data of this thesis comes. Next, an explanation of the actual algorithm design is given. The different phases of the method are discussed, followed by the actual implementation in Python 3. The principle of the actual algorithm is to remove redundant data by visualizing an aggregation of buildings with the same roof type. The minimization of the size of the resulting file is further provided by removing gaps between buildings and aligning the walls of the buildings on the outside of the block. All geometry changes are done under the condition that the volumes of building bodies and roof parts are preserved. Keywords: 3D GIS, generalization, aggregation, generalization automation
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Adaptive text retrieval system
Lysák, Jakub
This paper deals with using of the neural networks in information retrieval. There are studied and described some already implemented information retrieval systems based on neural networks and summarized possible advantages and disadvantages of this access in this paper. On the basis of them is designed the own adaptive system called ADIS, built on layered network and the backpropagation algorithm. System simulates user's imaginations using term association acquired from relevance feedback. Design contains discussion of different variants, options and parameters of the system. The thesis also includes implementation and practical tests on collection containing about thousands documents.
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Tourist map of Srbsko in Český kras with focus on karren relief depiction
Šašková, Marie ; Lysák, Jakub (advisor) ; Tomková, Michaela (referee)
Tourist map of Srbsko in Český kras with focus on karren relief depiction Abstract The aim of this bachelor thesis is to create a large-scale tourist map capturing location of Srbsko (Český kras) and surrounding area. The focus is on karren relief depiction. The partial goal of the thesis is to collect and evaluation quality of the available spatial data useful for creating the large-scale map. As the main source of existing data are used ČÚZK data, JESO database and database OpenStreet Map, which is available for free. These data are suplemented based on field survey, which took place using the ArcGIS Collector and a GNSS receiver. The final part describe creation of the tourist map, that respects cartography rules and designing of the symbology. The map is a graphical output of the thesis and can be used as a folding map as well as a board map. Keywords: tourist map, large-scale map, topographic mapping, karren relief depiction, Srbsko (Český kras)
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Tourist map of the Pravčická brána Rock Arch and its surroundings with focus on large-scale sandstone relief mapping
Žuravská, Markéta ; Lysák, Jakub (advisor) ; Čábelka, Miroslav (referee)
The aim of this bachelor's thesis is to create a detailed large-scale tourist map that shows the location of the Pravčická brána Rock Arch and its surroundings in the Bohemian Switzerland National Park with a focus on depicting the sandstone relief. Emphasis is placed on the use of information about rock structures from detailed aerial laser scanning data, which allows the representation of rock formations using the shading method. The other data for the creation of a detailed map are obtained by evaluating the available old maps of Bohemian Switzerland, Pravčická brána Rock Arch and its surroundings respectively, and contemporary spatial data of the location. As part of the bachelor's thesis, they were refined and supplemented by field research using GNSS. The field survey is conducted mainly using a mobile application Collector for ArcGIS on the basis of a digital relief model created from aerial laser scanning data. The resulting map is processed in the ArcGIS Pro software. The created large-scale map of this location is in the form of a board map or a folded map and is probably the first such detailed tourist map of the nearby Pravčická brána Rock Arch which uses detailed aerial laser scanning data to show rocks and to reveal both contemporary and historical objects and their Czech and German...
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Utilisation of cartographic rock representation in the Czech State map series for enhancement of rock formations topographic data in ZABAGED
Kyncl, Günter ; Lysák, Jakub (advisor) ; Šidlichovský, Pavel (referee)
Bachelor's thesis abstract G. Kyncl 2020 Utilisation of cartographic rock representation in the Czech State map series for enhancement of rock formations topographic data in ZABAGED Abstract This thesis deals with utilisation of cartographic rock representation in the Czech State map series for enhancement of rock formations topographic data in ZABAGED. The first part of the paper describes the method of rock drawing developed and used by the Czech Land Survey Office on their base maps. In the next part some methods of computational ceometry which are used in this paper briefly described. Next part is devoted to description of used data on rock formations provided by Czech Land Survey Office. In this part is also described the process of data preprocessing for next usage in the thesis. The main part of this paper deals with the proposal of methods for automatic obtaining the topographic information about rock formations from their cartographic representation. Proposed methods are focused on the classification of rock drawing polygon perimeter and on the identification of ridgelines, valley lines and inner edge lines. Proposed methods are tested and evaluated on provided data. Key words rock formations, rock drawing, state map series, ZABAGED
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Proposal of methodology for Protected Landscape Area maps production
Pekařová, Kateřina ; Lysák, Jakub (advisor) ; Jaroš, Jakub (referee)
Proposal of methodology for protected landscape area maps production Abstract The main goal of this bachelor's thesis is to create a proposal for a methodology for creating maps of protected areas in Czech Republic. The first part of the paper is devoted to acquaintance with the basic knowledge of thematic cartography with emphasis on the basic cartographic rules in the creation of maps. The following is an evaluation of existing maps of protected areas in the Czech Republic and in the world. An overview of data sources is also given. Based on the findings from the first part, the practical part of the thesis then creates the proposal of methodology itself, which is tested on sample maps. Keywords: thematic map, nature conservation, spatial data, cartographic generalization, methodology
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Thematic atlas of the Prague islands
Krusová, Anna ; Lysák, Jakub (advisor) ; Janata, Tomáš (referee)
The aim of the work is to create a thematic atlas, the content of which are maps of selected lesser-known Prague islands, mostly inaccessible by foot. The partial goals are the identification of all islands in Prague using spatial data and analysis, evaluation of existing and acquisition of own spatial data, which are then used to create detailed maps of selected islands and processing of an atlas with additional texts and images. In theoretical part, literature and available sources of data on the Prague islands are researched and the work is placed in the context of cartography. The practical part describes the whole process of the atlas compilation, from the identification of individual islands through field survey to cartographic processing of the obtained spatial data and finalization of the resulting work. The output of the work is the Thematic Atlas of the Prague Islands, which was made made using ArcMap and InDesign software. Key words Prague, islands, thematic atlas, thematic cartography
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