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Aplinkos inžinerijos fakultetas Padaliniai Geodezijos ir kadastro katedra Studijos Baigiamųjų darbų anotacijos

Baigiamųjų darbų anotacijos

Studento vardas, pavardė	Baigiamojo darbo pavadinimas	Baigiamojo darbo vadovas
2020 metų magistro baigiamųjų darbų anotacijos
Studento vardas, pavardė Viktorija Jonušaitė	Baigiamojo darbo pavadinimas Skirtumų tarp geodezininkų ir architektų 3D pastatų projektų analizė	Baigiamojo darbo vadovas doc. dr. Jūratė Sužiedelytė Visockienė
Anotacija (lietuvių k.) Baigiamojo magistro darbo tikslas - nusatyti skirtumas tarp geodezininko ir architekto 3D modelio projektų. Tikslui pasiekti buvo išanalizuoti dviejų objektų (Luisės sanatorija ir Klatanenai svirnas) 2D fasadų brėžiniai išbraižyti architecto ir geodezininko. Buvo apžvelgti skirtumai tarp modelio projektų nubraižytų profesionalų. Palyginus gautus skirtumus tarp geodezininko ir architekto pastato modelių buvo sudarytos išvados ir pateikti pasiūlimai. Darbą sudaro: įvadas, literatūros apžvalga, 3 skyriai, išvados ir pasiūlimai, literatūros šaltinų sarašas. Darbo apimtis: 57 puslapiai, 55 paveikslai, 7 lentelės, 22 literatūros šaltiniai. Raktiniai žodžiai: 3D modelis, 2D brėžinys, pastato modelis. Anotacija (užsienio k.) The main point of master thesis - to analyze differences between surveyors and architects 3D model projects. To achieve main purpose, there where analysed two object's (Luise sanatorium and Kaltanenai barn) drafts of 2D facades made by architects and surveyors. Where reviewed differences between model projects drawn by different professionals. Fallowing the results of gotten differences between surveyors and architects building models conclusion and suggestions where made. Structure: introduction, literature review, 3 chapters, conclusion and suggestions, references. Thesis consists of: 57p. 55 figures, 7 tables, 22 references Raktiniai žodžiai: 3D model, 2D draft, building model.
Studento vardas, pavardė Reinis Cimdinš	Baigiamojo darbo pavadinimas Medžių metrikos parametrų nustatymas naudojant LiDAR taškų masyvą	Baigiamojo darbo vadovas doc. dr. Darius Popovas
Anotacija (lietuvių k.) Forest inventory is fundamental information for forest management and therefore forestry sector is seeking for options to automate tree parameter acquisition with remote sensing technologies like LiDAR (light detection and ranging). UAV (unmanned aerial vehicle) LiDAR point cloud have increased spatial accuracy and higher point density. Research gives background information about LiDAR technology and its implementation in tree parameter detection. Study introduce in practical UAV LiDAR data acquisition and registration process to produce hight density point cloud. Laser scanning data set is utilized to make tree detection, estimate their height and provide options for individual tree segmentation. Tree detection and height estimates were determined using three methods. RAS_OVRL detection approach successfully extracted 85.7% of all tree locations and extracted 65.1% of all tree height that fulfilled national forest inventory accuracy requirements however considering only correctly detected trees Lmax approach made 87.8% valid tree heights with correlation coefficient 0.80 comparing measured and estimated values. Tree segmentation was generated using two approach and marker-controlled watershed algorithm made most realistic shapes and delineation borders. UAV LiDAR data have potential to support forest inventory however more precise point cloud processing algorithms are needed. Raktiniai žodžiai: UAV LiDAR, tree parameters, forest inventory Anotacija (užsienio k.) Forest inventory is fundamental information for forest management and therefore forestry sector is seeking for options to automate tree parameter acquisition with remote sensing technologies like LiDAR (light detection and ranging). UAV (unmanned aerial vehicle) LiDAR point cloud have increased spatial accuracy and higher point density. Research gives background information about LiDAR technology and its implementation in tree parameter detection. Study introduce in practical UAV LiDAR data acquisition and registration process to produce hight density point cloud. Laser scanning data set is utilized to make tree detection, estimate their height and provide options for individual tree segmentation. Tree detection and height estimates were determined using three methods. RAS_OVRL detection approach successfully extracted 85.7% of all tree locations and extracted 65.1% of all tree height that fulfilled national forest inventory accuracy requirements however considering only correctly detected trees Lmax approach made 87.8% valid tree heights with correlation coefficient 0.80 comparing measured and estimated values. Tree segmentation was generated using two approach and marker-controlled watershed algorithm made most realistic shapes and delineation borders. UAV LiDAR data have potential to support forest inventory however more precise point cloud processing algorithms are needed. Raktiniai žodžiai: UAV LiDAR, tree parameters, forest inventory
Studento vardas, pavardė Kristiana Krūmina	Baigiamojo darbo pavadinimas Geodeziniai darbai rekonstruojant plieninį geležinkelio tiltą	Baigiamojo darbo vadovas doc. dr. Jūratė Sužiedelytė Visockienė
Anotacija (lietuvių k.) Master’s Thesis, “Geodetic works in railway steel bridge reconstruction,” describes what kind of geodetic works has to be done in the railway bridge reconstruction works and what kind of nuances geodetic engineer should pay attention. The thesis outlines a steel bridge structure, different types of instruments that can be used for this job, and software’s. The scope of the thesis is to describe what are the main tasks that the surveyor must deal with in the railway bridge reconstruction works, including the bridge placement method. The thesis is based on personal experience and information found in scientific literature. Content of the thesis: • Section 1 depicts what the project Getingmidjan is; • Section 2 gives an insight into what is the structure of a railway bridge; • Section 3 describes used surveying technologies; • Section 4 depicts steps that geodetic engineers deal with in railway steel bridge reconstruction works at project Getingmidjan; • Section 5 gives an insight into what BIM is and how it collaborates with surveying; • Section 6 provides an overview of related terms to current job in Latvia and Sweden; • Section 7 outlines what the project Rail Baltica is. Raktiniai žodžiai: Keywords: geodetic works, railway steel bridge, robotic total-station, laser scanning, monitoring, BIM. Anotacija (užsienio k.) Master’s Thesis, “Geodetic works in railway steel bridge reconstruction,” describes what kind of geodetic works has to be done in the railway bridge reconstruction works and what kind of nuances geodetic engineer should pay attention. The thesis outlines a steel bridge structure, different types of instruments that can be used for this job, and software’s. The scope of the thesis is to describe what are the main tasks that the surveyor must deal with in the railway bridge reconstruction works, including the bridge placement method. The thesis is based on personal experience and information found in scientific literature. Content of the thesis: • Section 1 depicts what the project Getingmidjan is; • Section 2 gives an insight into what is the structure of a railway bridge; • Section 3 describes used surveying technologies; • Section 4 depicts steps that geodetic engineers deal with in railway steel bridge reconstruction works at project Getingmidjan; • Section 5 gives an insight into what BIM is and how it collaborates with surveying; • Section 6 provides an overview of related terms to current job in Latvia and Sweden; • Section 7 outlines what the project Rail Baltica is. Raktiniai žodžiai: Keywords: geodetic works, railway steel bridge, robotic total-station, laser scanning, monitoring, BIM.
Studento vardas, pavardė Ieva Farenhorste	Baigiamojo darbo pavadinimas GNPS imtuvo tikslumo priklausomybė nuo naudojamų palydovinių sistemų skaičiaus	Baigiamojo darbo vadovas doc. dr. Jūratė Sužiedelytė Visockienė
Anotacija (lietuvių k.) Magistro baigiamojo darbo “GNPS veiklos priklausomai nuo palydovų sistemų skaičiaus tyrimai” tikslas yra nustatyti, kaip palydovų skaičiaus padidėjimas turi įtakos GNPS matavimų kokybei. Per pastarąjį dešimtmetį GPS ir GLONASS prisijungė prie dviejų pasaulinių palydovų sistemų - ES Galileo ir Kinijos BeiDou. Taip pat patobulėjo GNPS imtuvai. Tai reiškia, kad matininkai gali pasirinkti, kurią sistemą naudoti. Tai taip pat reiškia, kad jie gali naudoti daugiau nei dvi sistemas vienu metu. Autorei pasidarė įdomu, kaip pagerėja tikslumas ir kuo skiriasi, kai vaizde yra 10, 20 ar net 30 palydovų. Darbo tikslui pasiekti buvo iškeltos kelios užduotys, apimančios mokslinės medžiagos analizę, siekiant įvertinti gautus rezultatus. Pirmame skyriuje aprašoma pagrindinė informacija apie GNPS, dvi naujausias pasaulines palydovų sistemas - Galileo ir BeiDou, GNPS matavimo paklaidos, ypatingą dėmesį skiriant tikslumo praskiedimui. Taip pat aprašytas matavimuose naudojamas Leica GS18 imtuvas ir Leica Infinity papildomo apdorojimo programinė įranga. Antrąjį skyrių sudaro RTK ir post apdorojimo padėties nustatymo metodai, referencinių stočių sistemos Latvijoje - LatPos ir Lietuvoje - LitPos, taip pat aprašoma matavimo vieta ir metodika. Trečiame skyriuje aprašomi ir palyginami matavimo rezultatai. Pabaigoje daromos išvados apie rezultatus. Raktiniai žodžiai: GNPS, Galielo, BeiDou, GPS, GLONASS, palydovai Anotacija (užsienio k.) Master„s Thesis „GNSS performance studies depending on the number of satellite constellation” goal is to determine how the increase in the number of satellites affects the quality of GNSS measurements. In last decade to GPS and GLONASS have joined two global satellite systems – EU?s Galileo and China?s BeiDou. Also GNSS receivers have improved. It means that surveyors can choose which system to use. As well it means they can use more than two systems at a time. That made author curious, how does the accuracy improves and differs when there is 10, 20 or even 30 usable satellites in the view. In order to achieve the goal of the Thesis, several tasks were set out, which included the analysis of scientific materials in order to evaluate the obtained results. The first section describes some basic information about GNSS, two latest global satellite systems - Galileo and BeiDou, GNSS measurement errors, with a particular focus on dilution of precision. Also the Leica GS18 receiver used in the measurements and the Leica Infinity post-processing software are described. The second chapter consists of RTK and post processing positioning methods, reference station systems in Latvia - LatPos and Lithuania - LitPos, as well as describes the measurement site and methodology. Chapter three describes and compares the measurement results. In the end, conclusions are drawn about the results. Raktiniai žodžiai: GNSS, Galileo, BeiDou, GPS, GLONASS, satellites
Studento vardas, pavardė Vladislavs Jamkins	Baigiamojo darbo pavadinimas Virtualios realybės ir papildytosios realybės naudojimas statyboje	Baigiamojo darbo vadovas doc. dr. Jūratė Sužiedelytė Visockienė
Anotacija (lietuvių k.) The objective of this master thesis “VR and AR applications on construction site” is to give insight in using such kind of technology, and how virtual and augmented reality technology can help to make easier to work on construction site (in terms of planning, money, and time) in building cycle. The thesis is based on information found in literature sources and personal experience. The thesis provides an overview in briefly technology history, describes the implementation of BIM and computer graphics models in a virtual and augmented reality environment. Also is expressed virtual and augmented reality definitions, systems requirements, and its types, as well as, where can be technology implemented on construction sites and its purpose. Marked out most used devices and software that is used to get the best performance on construction site. In master thesis is described tracking methods for augmented reality, like outdoor tracking techniques, still sensitive topic - indoor tracking technique and combined technique – fusion tracking using SLAM, Bluetooth, beacons implementation. As a conclusion, this thesis shows that by using virtual and augmented reality technology on construction site it can help to avoid mistakes in project start, what can save a lot of money, technology can represent to the client the final model with walkthrough, before a building is started, to satisfy their needs. The construction experts and on-site workers can see all models in a 3D environment instead of 2D plans, to get a better understanding. Since technology is new for construction purposes there is still a way to develop further. Raktiniai žodžiai: 3D, AR, VR, augmented reality, virtual reality, BIM, Oculus Rift, Microsoft Hololens, DAQRI, SLAM, tracking techniques, virtual environment. Anotacija (užsienio k.) The objective of this master thesis “VR and AR applications on construction site” is to give insight in using such kind of technology, and how virtual and augmented reality technology can help to make easier to work on construction site (in terms of planning, money, and time) in building cycle. The thesis is based on information found in literature sources and personal experience. The thesis provides an overview in briefly technology history, describes the implementation of BIM and computer graphics models in a virtual and augmented reality environment. Also is expressed virtual and augmented reality definitions, systems requirements, and its types, as well as, where can be technology implemented on construction sites and its purpose. Marked out most used devices and software that is used to get the best performance on construction site. In master thesis is described tracking methods for augmented reality, like outdoor tracking techniques, still sensitive topic - indoor tracking technique and combined technique – fusion tracking using SLAM, Bluetooth, beacons implementation. As a conclusion, this thesis shows that by using virtual and augmented reality technology on construction site it can help to avoid mistakes in project start, what can save a lot of money, technology can represent to the client the final model with walkthrough, before a building is started, to satisfy their needs. The construction experts and on-site workers can see all models in a 3D environment instead of 2D plans, to get a better understanding. Since technology is new for construction purposes there is still a way to develop further. Raktiniai žodžiai: 3D, AR, VR, augmented reality, virtual reality, BIM, Oculus Rift, Microsoft Hololens, DAQRI, SLAM, tracking techniques, virtual environment.

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