Dissertations / Theses on the topic 'QGIS'
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Österman, Anna. "Map visualization in ArcGIS, QGIS and MapInfo." Thesis, KTH, Geodesi och geoinformatik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-147252.
Full textŠilháček, Ondřej. "Vizualizace katastrální mapy v ArcGIS a QGIS." Master's thesis, Česká zemědělská univerzita v Praze, 2016. http://www.nusl.cz/ntk/nusl-259283.
Full textEnglund, Erik. "Defining New Boundaries in QGIS Based on Existing Definitions." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-303894.
Full textPihl, Petra. "Dokumentationsmodell för fibernätverk : Utveckling av ett insticksprogram i QGIS." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-74449.
Full textLarsson, Karl. "Digitization in ArcGIS, QGIS and MapInfo. A systematic survey and recommendation of program." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-150114.
Full textLindén, Philip. "Improving accessibility to the bus service : Building an accessibility measurement tool in QGIS." Thesis, Umeå universitet, Institutionen för geografi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-185145.
Full textCamargo, Marcel Pinton de. "Aerial machine vision, geographical information system and hue for pattern classification in agriculture." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/11/11152/tde-17012019-180101/.
Full textNesta pesquisa pretendemos alcançar a coesão cibernética no fluxo de informações dentro da agricultura de precisão, integrando métodos de aprendizagem de máquinas, visão computacional, sistema de informação geográfica e aerofotogrametria em uma área irrigada com efluente de matadouro, sob cinco tratamentos (W100 - irrigação com água superficial e 100 % de adubação mineral nitrogenada, E0, E33, E66 e E100 - irrigação com efluente tratado de abatedouro e adição de 0, 33, 66 e 100% de adubação mineral nitrogenada, respectivamente) e quatro repetições em pastagem (Cynodon dactylon (L.) Pers.) Várias imagens (entre cem e duzentas) com modelo de cor vermelho, verde e azul (RGB) foram capturadas por um quadricóptero voando a 20 metros de altitude, e obtendo resolução espacial de 1 centímetro em uma superfície de aproximadamente 0.5 ha. As imagens foram ortorretificadas juntamente com nove pontos de controle, realizados pelo sistema de posicionamento global diferencial (GPS), ambos processados no software Agisoft PhotoScan. Treze projetos fotogramétricos foram realizados ao longo do tempo com revisita de 30 dias, a raiz do erro quadrático médio (RMSE) foi usada como medida de acurácia e atingiu valores menores que 5 centímetros para os eixos x, y e z. A ortoimagem obtida com a fotogrametria do veículo aéreo não tripulado (UAV) foi alterada de RGB para matiz, saturação, valor (HSV) e o espaço de cor matiz foi escolhido devido a independência da iluminação, além de ter boa descrição da exposição do solo e vegetação. Entretanto este é dependente da temperatura da fonte de luz, portanto difícil de se estabelecer um limiar estático, logo selecionamos um método de classificação não supervisionado, o K-Means, para classificar os padrões desconhecidos ao longo da área. Polígonos foram traçados delimitando a área representada por cada parcela e um método supervisionado de classificação baseado na entropia foi utilizado, a árvore de decisão, para explorar e encontrar padrões que reconheçam cada tratamento. Essas etapas também são exibidas em formas de mapas temáticos georeferenciados e foram executadas nos softwares de código aberto Python, QGIS e Weka. As regras definidas no espaço de cor matiz atingiram uma acurácia de 100% no conjunto de treinamento e proporcionaram um melhor entendimento sobre a distribuição do solo e da vegetação nas parcelas. Esta metodologia mostra um grande potencial para análise de dados na agricultura de precisão.
Höijer, Emma. "Kompatibilitet mellan olika systems format för stilsättning av geodata : En undersökning av stilformaten SLD och MBstyle." Thesis, Karlstads universitet, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-67859.
Full textMany actors in society need geodata delivered from, among others, governmental agencies. Often there is also the need to combine data from different sources. Style of vector data is visualized, in conjunction with geodata, using a separate style file that describes how each object will be presented. The advantage is the ability to retrospectively modify the appearance of a particular object in the map image, unlike when a WMS service is applied, and the user gets a predetermined look that cannot be changed. However, the disadvantages of styled vector data are obvious when combining geodata from different providers, who uses different systems. GIS software are available as both licensed and open source. Among the style formats used in open source software, many are compatible with each other and can be interpreted in different systems. Having said that, this does not always work seamlessly. In this thesis QGIS was used. The style file was exported to GeoServer using three different methods. In all methods included styling of point, line and polygon objects. Using method 1, the style file imported in QGIS in the OGC standard format SLD 1.1.0, this generated the most similar result for the visualization. The result for the point features shows 81 %, the line features 56 % and the polygon features 47 % similarity. Using method 2, the style file was imported in the GeoServer Explorer plugin, generated the OGC standard format SLD 1.0.0. The result shows that a variety of parameters for describing the style are not interpreted correctly and the size of the objects is consistently quadrupled. The result for the point features shows 58 % similarity, the line features 39 % and the polygon features 44 % similarity. Using method 3, the QGIS styling was exported via the Lib-mapboxgl-qgis plugin, thus generating the style in MBstyle format. The point features, which were visualized through a PNG file and results shows 62 % similarity. The line features were tested with three simple line features created only for the MBstyle test, as more advanced styling was not validated during export. The three lines were classified as similar with some kind of defect, giving 67 % similarity. Polygon features in MBstyle showed a non-similar visual result. All polygons were visualized with only a solid fill and a stroke, which did not even appear in correct color. The similarity of the polygons was measured as 39 %. However, this relatively high percentage is due to the fact that the chosen judgement criteria rewards points for simply generating a visual output. The purpose with the sampling modification was to investigate whether it was possible to create a style file that generated a similar visual result as the original style in QGIS. Modification was made only to the two SLD versions. The differences between the methods and styles in the different versions turned out to depend on how the styles were translated. Method 1 generated a more detailed translation with more parameters included, such as reference to a font. Method 2 translated a font style to a Mark without detailed content, resulting in that a default setting was applied.
Silva, Jefferson Luiz Gonçalves. "Identificação das áreas aptas a aplicação de biofertilizantes suínos com utilização de SIG." Universidade Estadual do Oeste do Paraná, 2017. http://tede.unioeste.br/handle/tede/3299.
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Brazil is the fourth largest swine producer and exporter in world, with swine farming being very representative in the national scenario. This production, however, implies generation of waste and this needs to be mitigated. One of the alternatives to reduce the impact caused by pig waste is the application of anaerobic biodigestion treatment, obtaining biogas and digestate as by-products. Digestate can be used as biofertilizer, generating a new product. In this context, this work proposes to define a geographic database from different sources about the national production of swine and to estimate, supported by calculation methodology defined in activities of the BiogasFert Network, the respective production of waste and biogas. These results were provided in an web system using GeoServer map server. In addition, a methodology was defined in this work to identify areas of permanent preservation in top of hills, based on the Brazilian new forest code published since 2012, and in classes of declivity unfit for fertilizer inputs (regions with slopes greater than 45%). As result, a total of 60,879,431 km² (0,72%) of areas considered inapt for the application of fertilizers in the national territory were identified. Another objective of this work was to highlight the use of free GIS software and its processing power, since the metrics applied here were elaborated using exclusively open source software.
O Brasil é o quarto maior produtor e exportador de carne suína mundial, tendo a suinocultura uma grande representatividade no cenário agropecuário nacional. Essa produção, contudo, implica na geração de resíduos, que necessitam ser mitigados. Uma das alternativas para reduzir o impacto causado por dejetos de suínos é a aplicação de um tratamento de biodigestão anaeróbia, obtendo-se como subproduto o biogás e o digestato, o qual pode ser utilizado como biofertilizante, tornando-se não só uma forma de tratamento como também de geração de novos produtos. Neste contexto, este trabalho propôs definir uma base de dados geográfica a partir da integração de fontes distintas acerca da produção nacional de suínos e estimar, apoiado por metodologia de cálculo definida em atividades da Rede BiogásFert, a respectiva produção de dejetos e biogás. Tais resultados foram aportados em sistema web via servidor de mapas GeoServer. Além disso, define-se neste trabalho metodologia para identificar áreas de preservação permanente em topo de morro, a partir do novo código florestal veiculado desde 2012, bem como as classes de declividade inaptas ao aporte de fertilizantes (regiões com declividade superior a 45%). Como resultado, foi identificado um total de 60.879,431 km² (0,72%) de áreas consideradas inaptas à aplicação de fertilizantes no território nacional. Um outro objetivo deste trabalho foi o de evidenciar o uso de softwares SIG livres e o seu poder de processamento, visto que as metologias aqui aplicadas foram elaboradas com uso exclusivo de softwares open source.
Nilsson, Olov. "3D- modellering med LAS-data : Tester i ett licensierat- och i ett Open source-program." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-72665.
Full textIt has become more popular to create 3D models among local governments and companies today. Now it´s possible to visualize most objects in 3D, which can give an increased understanding. The local government in Lidköping wants to be able to use their LiDAR data to visualize buildings and to combine several data layers with 3D visualizations to create useful web map services. At the present, there is no software that are able create 3D models of LiDAR data at the Local government. The local government in Lidköping is interested in testing different options for modelling in 3D. Two software packages were chosen; ArcGIS Pro and QGIS. ArcGIS Pro is a GIS software that is highly acknowledged in the market. It´s licensed and can be considered expensive. QGIS is a software that is completely free to use and uses open source code, which makes it possible to create algorithms that can then be used in the program. In this view, there will be comparison between a software that is expensive and a software that is completely free. The method used to compare the two software consists of three stages. Stage 1 is a software comparison, where the software capabilities are set against each other in different scenarios. Stage 2 is an investigation of positional accuracy where the coordinates of the 3D model's building corners are compared with coordinates measured with Total Station as reference. RMSE is used to compare positional accuracy. Stage 3 is a visualization analysis that takes place through a questionnaire answered by people who are familiar with GIS and 3D. The result of all three stages, according to the method performed, shows that ArcGIS Pro is the better software. At stage 1, ArcGIS Pro won five out of eight scenarios against QGIS, though QGIS was more time efficient than ArcGIS Pro. At stage 2, ArcGIS Pro had a RMSE value for height of 1,617, which is lower than the 1,961 RMSE value that was on QGIS. At stage 3, ArcGIS Pro had over 90% of the reply rate for most of the questions, representing that ArcGIS Pro’s images were better to visualize the different scenarios. Some comparisons were not completely even though. QGIS had better time accuracy because it did not get as much errors which needed further investigations as in ArcGIS Pro. Although ArcGIS Pro’s processes for creating 3D models were faster. The positional accuracy comparison for the building’s height shows higher accuracy between ArcGIS Pro and the Total Station’s measurements. In QGIS the 3D-modell had no roof model, which made it harder to get accurate height of the building.
Bexhorn, Johan, and Ninnie Tägtström. "Framtagning av en generisk databas för trafikdata : En analys av olycksbilden kring trafikplatser." Thesis, KTH, Transportplanering, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-299037.
Full textIn the analysis and investigation of traffic-related topics users must be responsible for locating relevant and current data. There are no guarantees that all necessary information can be combined in the requested way. This puts higher demand on knowledge in data management when it comes to preventing accidents in traffic. The aim of this study is to investigate the possibility to combine different data to create a generic database that can be used in work with road safety. With the help of this database, the accident statistics for traffic locations in Region Västmanland have been examined in an attempt to identify contributing causes of accidents. The focus has been on developing and using a generic database. By collecting and adapting data from NVDB and STRADA, different types of analyzes have been made in the programs QGIS and R, with the aim of finding connections between parameters and traffic accidents. In addition, three interviews were conducted with relevant experts. The result was that today it is not realistic to be able to create a generic database containing the large amount of information that is requested. It is because the structure of the data needs to be updated and adapted. But also because there is a lack of technical knowledge in the field to automate the process sought. The results showed that regarding the it was not possible to find statistical correlations with traffic accidents. The wide spread in traffic accidents make it difficult to find specific correlations between individual factors and accidents. Therefore the study suggests that more interchanges get integrated into the database or an extended statistical analysis of the current database.
Martucci, Marco. "Quantificazione delle Biomasse residuali agricole nel Sud Italia e successivo confronto tra algoritmi di mappatura nativi ed esterni in QGIS." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20658/.
Full textNervo, Andrea. "Stima del sequestro e immagazzinamento di CO2 nelle praterie di Posidonia oceanica." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10064/.
Full textMcPherson, Mercedes. "Auto-Generating Maps Using Open-Source GIS and Python." The University of Arizona, 2017. http://hdl.handle.net/10150/626250.
Full textГнида, А. С. "Підвищення ефективності управління територіями Батуринської об'єднаної територіальної громади шляхом впровадження локальної інфраструктури геопросторових даних." Thesis, Чернігів, 2021. http://ir.stu.cn.ua/123456789/25172.
Full textВипускна кваліфікаційна робота присвячена розробці локальної інфраструктури геопросторових даних території Батуринської об'єднаної територіальної громади із врахуванням теоретико-методичних основ створення даної ГІС. В кваліфікаційній роботі представлені вступ, теоретична, аналітична та практична частини, охорона праці, висновки, список використаних джерел та додатки. У першому розділі висвітлені теоретико-методичні основи створення та ведення локальної інфраструктури геопросторових даних. У другому розділі узагальнено статистичну та текстову інформацію щодо території Батуринської міської громади та на її основі створено профіль досліджуваної території. У третьому розділі описано особливості практичної реалізації локальної інфраструктури геопросторових даних Батуринської громади у розрізі базового, тематичного та проблемно-орієнтованого набору геопросторових даних. Зокрема, розроблено алгоритм картографічного відображення результатів SWOT-аналізу при реалізації веб-карти досліджуваної території. Четвертий розділ присвячений основним заходам щодо охорони праці та безпеки при створенні муніципального геопорталу.
The final qualifying work is devoted to the development of the local infrastructure of geospatial data of the Baturyn united territorial community, taking into account the theoretical and methodological foundations of this GIS. The qualification work presents the introduction, theoretical, analytical and practical parts, labor protection, conclusions, list of sources and appendices. The first section highlights the theoretical and methodological foundations of creating and maintaining a local infrastructure of geospatial data. The second section summarizes statistical and textual information about the territory of the Baturyn city community and on its basis creates a profile of the study area. The third section describes the features of the practical implementation of the local geospatial data infrastructure of the Baturyn community in terms of basic, thematic and problem-oriented set of geospatial data. In particular, an algorithm for mapping the results of SWOT-analysis in the implementation of the web map of the study area has been developed. The fourth section is devoted to the main measures of labor protection and safety in the creation of the municipal geoportal.
Jaber, Noaaemi Fadi. "Jämförelse av olika kvalitetsmått vid kartering av hustak med hjälp av LiDAR-data : Metod för utvärdering av kartering med ArcGIS Pro, QGIS och FME." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-78364.
Full textThe development of technology within GIS has increased the need for the data that being quickly added while covering large geographical areas. Such need is at the international level, while requiring a willingness to cooperate for all parties involved, as the system can present geographical information with a wide range of applications. The need for such information has been used for products based on data obtained from laser scanning. In this thesis, laser data from two scanning sessions ordered by the Swedish Land Survey were used. The first laser scan (2011) was carried out with the aim of creating an accurate national elevation model (RH 2000) containing a classification of the laser points representing soil and water. The latter (2019) was done to achieve a spot density >1 point/m2 without criteria for classification. The purpose of the current thesis is to test and evaluate the available methods in ArcGIS Pro, QGIS and FME to ensure quality mapping of roofs. The aim was to investigate whether the extraction of roofs? can be carried out with an adequate quality so that the method can be recommended for the future works. Previous studies have focused on creating three types of elevation models DEM / DTM, DSM and nDSM. So, one can create an earth surface with the objects above the ground. In this thesis, the focus was on classifying point clouds for unassigned points (unassigned == 1) in which the buildings are located. This was done by testing different methods on different programs while keeping the parameters same. Classification, extraction and creation of polygons are the three steps used to extract roofs. Extraction of rooftops showed better results using ArcGIS Pro with 97 % from both scanning sessions. This was due to the cell size used in the study and that the buffer zones around each point were affected by polygons, which in turn were affected by the rooftop area. A survey was conducted to answer a question and the result showed that ArcGIS Pro is the best with 93,5 %. Problems that arose the study were mainly caused by the vegetation cover that could not be removed. As a conclusion, extraction of buildings from LiDAR-data is recommended for a point cloud with the latter laser scan with more than 1 point/m². Furthermore, it is recommended to use ArcGIS Pro to extract rooftops from laser scanning which is a comprehensive program i.e. that all the tools used in this thesis were freely downloaded from ESRI's ArcGIS Pro.
Cupiccia, Melissa. "Valutazione preliminare dell'effetto domino negli stabilimenti a rischio di incidente rilevante dell'Emilia Romagna." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10213/.
Full textChiapponi, Emilia. "Caratterizzazione dei sedimenti del fiume Tevere." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.
Find full textMearelli, Tommaso. "Studio geomorfologico dei campi carreggiati nel sale di atacama mediante tecniche di remote sensing." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
Find full textAmeri, Keivan. "Analisi e sviluppo di un modulo di quantificazione georeferenziata del rischio di incidente a condotte sottomarine." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20909/.
Full textNiro, Elisa. "Sviluppo di una metodologia per l'identificazione dei siti idonei al recupero energetico dalle acque reflue: rete fognaria della citta' di Bologna." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
Find full textOlianas, Rachele. "Ricostruzione dell'evento alluvionale del fiume Enza del dicembre 2017 mediante modellazione bidimensionale." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.
Find full textVenturoli, Serena. "Aspetti gestionali e scientifici dei vulcani di fango presso la Riserva Naturale delle Salse di Nirano." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
Find full textRidolfi, Arianna. "Evoluzione spazio-temporale della distribuzione della popolazione in relazione ad eventi alluvionali. I casi di India e Regno Unito." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/19794/.
Full textLibosvár, Marek. "Studie protipovodňových opatření v lokalitě Žabovřesky na Svratce v km 42,000 – 45,000." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240067.
Full textOllivier, Chloé. "Caractérisation et spatialisation de la recharge des hydrosystèmes karstiques : Application à l'aquifère de Fontaine de Vaucluse, France A QGIS Plugin Based on the PaPRIKa Method for Karst Aquifer Vulnerability Mapping Challenges and Limitations of Karst Aquifer Vulnerability Mapping Based on the PaPRIKa Method—Application to a Large European Karst Aquifer (Fontaine de Vaucluse, France)." Thesis, Avignon, 2019. http://www.theses.fr/2019AVIG0056.
Full textThe recharge of karst hydrosystems depends on climatic conditions, vegetation transpiration, soil evaporation, soil properties and karst heterogeneity. Recharging therefore depends on many factors that vary in time and space, and we wish to characterize and locate variations in the recharge of karst hydrosystems on a regional scale. The recharge can be diffuse or concentrated depending on the heterogeneity of the karst, which limits both measurement and modelling possibilities. Although evapotranspiration strongly influences the recharge of karst, the assessment of its spatiotemporal dynamics is often simplified. Calibration of the hydrogeological model parameters can compensate errors in estimating evapotranspiration and recharge and without external constraints, validation of the simulations remains difficult. In order to know the spatial and temporal distribution of karst recharge we propose a semi-distributed conceptual model of the hydrosystem (KaRaMel) associated with a semi-distributed conceptual model of evapotranspiration (SimpKcET). The tools developed are applied to the vast hydrosystem of the Fontaine de Vaucluse (South-East France). The results show that (1) the use of vegetation indices, provided by remote sensing, provides a realistic estimate of the spatiotemporal dynamics of evapotranspiration for all types of vegetation; (2) the spatial distribution of the parameters of the semi-distributed model can easily be constrained with information on soils (soil available water capacity) and on the hydrosystem (intrinsic vulnerability); (4) A toolbox for geographic information systems has been developed to facilitate the mapping of the intrinsic vulnerability of karst aquifers using the PaPRIKa method; (3) KaRaMel + SimpKcET provides both the spatial and temporal distribution of stocks and a reliable estimate of the aquifer discharges ; (4) daily, monthly and annual recharges change considerably in space and time, the most contributing areas varying from one year to the next; (5) the discharges of the Fontaine de Vaucluse are sensitive to the spatial distribution of the recharge
Rossi, Carlo Federico. "Gestione ambientale e strategia di adattamento ai cambiamenti climatici: approccio metodologico per l'Unione dei Comuni Reno Galliera." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15584/.
Full textCarretta, Nicola. "Confronto tra tecniche di remote sensing per la caratterizzazione di un ammasso roccioso presso le Gole di Scascoli, Loiano (BO)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11882/.
Full textMarko, Peter. "Detekce objektů v laserových skenech pomocí konvolučních neuronových sítí." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2021. http://www.nusl.cz/ntk/nusl-445509.
Full textAndersson, Jim. "LEFT VENTRICULAR EJECTION FRACTION: A RETROSPECTIVE STUDY COMPARING 2D ECHOCARDIOGRAPHY AND GATED SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY (SPECT) IN CLINICAL USE." Thesis, Uppsala University, Department of Medical Biochemistry and Microbiology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-114139.
Full textObjectives
The aim of this study was to compare left ventricular ejection fraction (LVEF) results derived from gated single photon emission computed tomography (SPECT) using Cedars-Sinai quantitative gated SPECT (QGS) processing software with results from 2D echocardiography, both obtained in routine clinical diagnostic use.
Methods
Data from previously performed tests were obtained from 73 patients who had undergone both 2D echocardiography and gated SPECT within a time span of 6 months and had not had significant events that could influence LVEF. LVEF from 2D echocardiography was reassessed to obtain discrete values and then the data was compared using Bland-Altman analysis.
Results
The correlation between the tests was shown to be good, but precision lacked. Bland-Altman analysis showed a bias of -0.8 percentage points when gated SPECT compared to mean values and 2 standard deviations (SD) ranged from -20.2 to 18.6.
Conclusions
LVEF values from the two methods can differ quite a bit and comparisons between them should be done with great caution.
Syfte
Syftet med studien var att jämföra hur bra ultraljud av hjärta och isotopundersökning av hjärta stämmer överens när det gäller att visa hjärtats pumpförmåga.
Metod
Data från tidigare utförda undersökningar av 73 patienter jämfördes. Patienter som hade gjort båda undersökningarna inom 6 månader och under perioden mellan undersökningarna inte hade haft hjärtinfarkt eller någon annan händelse som kan påverka hjärtats pumpförmåga valdes till studien.
Resultat
Utslaget över hela studiepopulationen stämde resultaten från de båda undersökningarna bra överens. Jämförde man däremot resultaten från de båda undersökningarna med varandra patient för patient förekom mycket stora variationer.
Slutsats
Resultaten angående hjärtats pumpförmåga kan skilja sig mycket från varandra. Jämförelser av värden från dessa två metoder bör därför göras med väldigt stor försiktighet.
Rozbořil, Tomáš. "Pasportizace bodových objektů pomocí QGIS." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-431788.
Full textCorreia, Rui Filipe Canelas. "Processing Image to Geographical Information Systems (PI2GIS) - a learning tool in QGIS." Master's thesis, 2017. https://hdl.handle.net/10216/107934.
Full textCorreia, Rui Filipe Canelas. "Processing Image to Geographical Information Systems (PI2GIS) - a learning tool in QGIS." Dissertação, 2017. https://hdl.handle.net/10216/107934.
Full textBortagaray, Natalia. "Desarrollo e implementación de algoritmos para QGIS en análisis de series de tiempo." Bachelor's thesis, 2018. http://hdl.handle.net/11086/6546.
Full textLos sensores remotos han sido valiosos auxiliares de los ecólogos en las últimas décadas. El uso más frecuente de estas herramientas se ha enfocado a la caracterización estructural del paisaje. Si bien se han logrado avances importantes, el aprovechamiento de la Teledetección en aplicaciones a la Ecología, parece estar por debajo de su potencial. En este trabajo se desarrollaron complementos para el sistema de información geográfica QGIS que permiten el preprocesamiento y análisis de series de tiempo del Índice de Vegetación Normalizado (NDVI), útiles para estudiar y comparar la estructura vegetal de diferentes puntos geográficos de interés, a través del tiempo. Las series fueron extraídas a partir de imágenes obtenidas por el sensor MODIS (Moderate Resolution Imaging Spectroradiometer), por un biólogo especialista.
Over the last decades, remote sensors provided a valuable service to ecologists. The most frequent use of this tool has been the structural characterization of landscape. Even though this use of remote sensing allowed important advances in ecology, it seems to be below its full potential. In this work we will develop plugins for QGIS, a geographic information system, to process and analyze time series of Normalizad Difference Vegetation Index (NDVI). This will be useful to analyze and compare the vegetation structure of different geographic points of interest, through time. The series where extracted, by a specialist biologist, from images of the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor.
Bicho, João Manuel Manzaca. "SIG E INFRAESTRUTURAS LINEARES : CADASTRO PREDIAL GEOMÉTRICO DE LINHAS DE ALTA TENSÃO." Master's thesis, 2022. http://hdl.handle.net/10316/99463.
Full textA proposta de trabalho insere-se no âmbito do estágio realizado na empresa Geolayer (Novembro a Abril de 2020-2021), sustentada pela análise bibliográfica que foi realizada. O estágio foi realizado em circunstâncias adversas, devido à pandemia da COVID-19, através do teletrabalho, desenvolveram-se todos os projetos que a empresa sugeriu e planeou.Este relatório de estágio teve como principal objetivo mostrar os três projetos que foram desenvolvidos na empresa, dois deles relacionados com a elaboração do cadastro para as linhas de alta tensão, usando bases de dados Excel e um outro relacionado com o plano de manutenção de uma linha de alta tensão. Todos os projetos foram desenvolvidos utilizando o software o SIG, QGIS, todas as ferramentas que este disponibiliza para a ligação entre base de dados para a realização do cadastro e ferramentas que permitem realizar análises e correções aos elementos geométricos que representam graficamente a linha de alta tensão.O presente trabalho, apresenta conceitos relacionados com a evolução do cadastro em Portugal, maioritariamente mostrar as dificuldades do seu desenvolvimento e as vantagens que este traz para a organização e conhecimento do território, relacionar com este os SIG que se revelam uma peça fundamental no apoio à tomada de decisão e mostrar o grande potencial dos softwares Open Source, como podem ajudar no progresso de cadastro. Por fim abordar a temática da relação entre bases de dados, através da exposição do vasto conceito de modelo relacional e do modelo entidade-relação, um dos processos importantes para a realização do cadastro.
The work proposal falls within the scope of the internship carried out at the company Geolayer (November to April 2020-2021), supported by the bibliographic analysis that was carried out. The internship was carried out in adverse circumstances, due to the COVID-19 pandemic, through telework, all the projects that the company suggested and planned were developed.This internship report had as main objective to show the three projects that were developed in the company, two of them related to the elaboration of the register for the high voltage lines, using Excel databases and another related to the maintenance plan of a line high voltage. All projects were developed using the software GIS, QGIS, all the tools that it provides for the connection between the database for the registration and tools that allow performing analyzes and corrections to the geometric elements that graphically represent the high voltage line. .The present work presents concepts related to the evolution of the cadastre in Portugal, mainly to show the difficulties of its development and the advantages that it brings to the organization and knowledge of the territory, to relate with this the GIS that reveal a fundamental part in supporting the decision making and show the great potential of Open Source software, how they can help in the progress of registration. Finally, to address the issue of the relationship between databases, through the exposition of the vast concept of the relational model and the entity-relation model, one of the important processes for carrying out the registration.
Viana, Gabriela Santos. "Elaboração de um plugin em QGIS no âmbito do projecto Marine-EO na Telespazio Ibérica." Master's thesis, 2021. http://hdl.handle.net/10362/121652.
Full textO objectivo central do presente relatório é descrever detalhadamente o período de estágio na Telespazio Ibérica. A raiz do meu trabalho como estagiária passou por garantir que todas as tarefas relacionadas com o plugin implementado no âmbito do projecto Marine-EO eram realizadas com sucesso, ligando sempre a componente de código e a interface gráfica do utilizador. Durante este período investiguei bastante sobre a linguagem Python e como esta podia conceber várias funções para as demais ferramentas do plugin através da junção de Python e software QGIS: PyQGIS. As tarefas realizadas têm o intuito de ajudar o utilizador a congregar um conjunto de informações através de uma plataforma e de um software, nas áreas de interesse, dentro da Europa. Neste relatório será demonstrada a arquitectura do projecto, os vários passos desde a arquitectura à construção de formulários do QGIS, tendo em conta a prática de código Python num Ambiente Integrado de Desenvolvimento. Os resultados do estágio tiveram um grande impacto na capacidade de orientar resultados e ser incentivada constantemente a pesquisar soluções para os problemas propostos. Ganhei outra perspectiva dos SIG e curiosidade de incluir cada vez mais a parte da programação no meu dia-a-dia como estudante e trabalhadora. Além disto posso afirmar que estando a realizar o estágio fora da zona de conforto – estar num país que não é o meu e ser uma área completamente nova para mim – foi uma tarefa muito desafiante que acabou por ser superada e proveitosa.
The main objective of this report is to describe in detail the traineeship period at Telespazio Ibérica. The root of my work as an intern was to ensure that all tasks related to the plugin implemented under the Marine-EO project were carried out successfully, always adding the code component and the graphical user interface. During this period, I investigated a lot about the Python language and how to conceive several functions for the other tools of the plugin through the combination of Python and QGIS software: PyQGIS. The tasks performed are intended to help the user to aggregate a set of information through a platform and GIS software, in the areas of interest, inside Europe. This report will demonstrate the architecture of the project, the various steps from the architecture to the QGIS viewing windows, considering the practice of Python code in an Integrated Development Environment. The results of the traineeship had a great impact on my ability to guide results and to be constantly encouraged to search for solutions to the proposed problems. I gained another perspective from GIS and curiosity to include more and more the programming part in my day-to-day life as a student and worker. In addition to this I can state that while doing the traineeship outside the comfort-zone – being in a country that is not mine and being a completely new area for me – it was very challenging task that ended up being overcome and profitable.
Assunção, Jorge Miguel Soares de Campos. "Terrain classification using machine learning algorithms in a multi-temporal approach A QGIS plug-in implementation." Master's thesis, 2021. http://hdl.handle.net/10362/129178.
Full textMapas de uso e ocupação do solo são cruciais para o entendimento e administração da topografia de uma nação, no entanto, os métodos convencionais de aquisição local de dados são caros e demorados. Contrariamente, dados provenientes de métodos de senso riamento remoto podem ser utilizados para gerar regularmente mapas atualizados com a ajuda de algoritmos de aprendizagem automática. Permitindo, por sua vez, a avaliação da dinâmica de uma região ao longo do tempo. Utilizando como base imagens de sensoriamento remoto fornecidas pela recente cons telação de satélites Sentinel-2, a presente dissertação concentra-se na implementação de um classificador de mapas de uso e ocupação do solo automatizado. O projeto, com foco em Portugal, irá procurar expandir abordagens anteriores através do aproveitamento de informação contextual contida nos ciclos vegetativos pela utilização de dados temporais adicionais. A solução adotada investigou a produção e implementação de um classificador geral de 9 classes num plug-in de um sistema de informação geográfico de código aberto. Durante o processo de teste, diversas técnicas de processamento e múltiplos algoritmos de aprendizagem automática foram avaliados numa abordagem multi-temporal, culminando num resultado final de precisão geral de 65,9% nas classes avaliadas.
RAGHAV, AYUSHI. "ASSESSMENT AND INDEXING OF GROUNDWATER QUALITY OF DELHI, INDIA USING GIS." Thesis, 2020. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18175.
Full textStarý, Miroslav. "Systém pro návrh optických sítí FTTH." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-429685.
Full textSilva, Pedro Frederico Pereira da. "Desenvolvimento de um plugin em ambiente SIG open source (QGIS) para obter parâmetros e métricas de copas de árvores, através de imagens adquiridas por VANTs." Master's thesis, 2017. https://hdl.handle.net/10216/110581.
Full textSilva, Pedro Frederico Pereira da. "Desenvolvimento de um plugin em ambiente SIG open source (QGIS) para obter parâmetros e métricas de copas de árvores, através de imagens adquiridas por VANTs." Dissertação, 2017. https://hdl.handle.net/10216/110581.
Full textCHOUDHURY, MD ABDUL MUEED. "Remote sensing approaches in carbon stock (CS) mapping considering the dominant tree species in urban areas." Doctoral thesis, 2021. http://hdl.handle.net/11566/290836.
Full textRecently, severe intensification of atmospheric carbon recognizes the importance of urban tree contributions in atmospheric carbon mitigation in city areas considering a sustainable urban green planning and management system. Explicit and timely information on urban trees and their roles in atmospheric Carbon Stock (CS) are essential for the policymakers to take immediate actions to recover the effects of deforestation and their worsening outcomes. This doctoral study will be a way out for the policymakers in CS mapping for the dominant tree species in their cities based on Remote Sensing (RS) data sources. The mapping approach could be a useful tool especially for developing countries, where hyperspectral data could be a better solution over the hardly available LiDAR data. In this study, a detailed methodology on the urban tree CS calibration and mapping was done for two urban areas one of which was in Sassuolo (MO), a smaller city in Italy. The other one was conducted in the capital region of Belgium (Brussels), where also the comparative analysis of the two different remote sensing data sources (LiDAR and WorldView 3 (WV3)) and their mapping outcomes were assessed to define the convenience and applicability of the data sources. In Sassuolo, CS mapping was done utilizing only the WV3 image data for a smaller study area of 22 plots (10m×10m each) where the 7 plots were utilized to validate the results of tree species classification and the CS calibration and mapping. Later in Brussels, the approach was implied for a larger study area of 75 plots (10m×10m each) where 20 plots were utilized for the validation of CS calibration and mapping outcomes. In all cases, either in Sassuolo or in Brussels, dominant tree species were identified and classified utilizing the high-resolution WV3 image. The Object-Based Image Analysis (OBIA) classification approach was successfully employed to attain the overall accuracy of 78% and 71% for the tree species in Sassuolo and Brussels respectively. The field estimations of CS for each plot were done utilizing an allometric model based on the field data on tree dendrometry i.e. Height (H) and Diameter at Breast Height (DBH). Later the computed CS based on the field data along with the WV3 (NDVI) and LiDAR (CHM) data derived variables, had been mapped in QGIS. The results were found quite evident for both cities which did approve the approach as an efficient and convenient way of mapping, certainly recognizing the dominant tree species contributions in atmospheric CS. No doubt, this study will assist the city planners to understand and decide the applicability of remote sensing data sources based on their availability and the level of expediency, ensuring a sustainable urban green management system.
Niza, Henrique Martins Espada. "African marine invertebrate data analysis and imaging: a dataset and digital platform for research, education and outreach." Master's thesis, 2019. http://hdl.handle.net/10451/40485.
Full textAs espécies costeiras e marinhas e os seus respetivos habitats estão a ser adversamente perdidos ou danificados, reduzindo significativamente a biodiversidade marinha. Os invertebrados marinhos, incluindo crustáceos decápodes, constituem importantes fontes de alimento para as populações locais, especialmente para pessoas mais pobres, que dependem destes recursos para sustento e alimentação. Moçambique e São Tomé e Príncipe abrigam um grande número de espécies decápodes indígenas, que são usadas pelas populações locais para a sua subsistência e segurança alimentar. Existe uma grande quantidade de dados valiosos sobre a biodiversidade do mundo, armazenados em Coleções de História Natural, repositórios digitais, programas de vigilância climática, projetos de investigação e outros, que estão disponíveis para pesquisa. Em particular, as Coleções de História Natural albergam informação muito relevante para estudos de biodiversidade, incluindo séries espaciais e temporais, na medida em que são desenvolvidas desde o século XIX, e têm sido usadas em numerosos estudos, desde taxonómicos e sistemáticos até distribuição espacial e temporal e composição populacional. A quantidade de dados acessíveis online cresce diariamente e desta forma, métodos e técnicas das ciências da computação são essenciais para a gestão e análise dos mesmos. Os repositórios online são instrumentos úteis na pesquisa sobre biodiversidade, pois fornecem acesso rápido aos dados de enumeras coleções. Vários museus, organizações e universidades processam informações das suas coleções em diversas bases de dados digitais que disponibilizam em repositórios na internet. Um desses repositórios de dados e o Global Information Facility for Biodiversity (GBIF). O modelo de metadados Darwin Core (DwC), e usado pelo GBIF com o intuito de partilhar informação padronizada sobre biodiversidade, e desempenha um papel fundamental na interoperabilidade e integração destes dados. Esta dissertação faz parte do projeto COBIO-NET – Coastal biodiversity and food security in peri-urban Sub-Saharan Africa: assessment, capacity building and regional networking in contrasting Indian and Atlantic Ocean, financiado pela fundação FCT/AGA KHAN. O objetivo desta secção do projeto COBIO-NET é compilar conjuntos de dados de crustáceos decápodes, e informação associada, de Moçambique e São Tomé e Príncipe por meio da catalogação em um conjunto de dados e base de dados organizados em DwC, e torná-los acessíveis através de repositórios e de mapas interativos online. Neste contexto, o principal objetivo da dissertação foi a construção de um conjunto de dados e o uso de ferramentas digitais para compilar informações a fim de criar um conjunto de dados abrangente sobre crustáceos decápodes e respetivos habitats nas zonas costeiras de Moçambique e São Tomé e Príncipe. O trabalho foi repartido em 4 partes: 1) recolha de dados mundiais sobre biodiversidade em repositórios digitais globais relacionados com Coleções de História Natural, outros dados de biodiversidade e literatura científica para a construção de um conjunto de dados; 2) gestão e processamento de dados sobre biodiversidade a partir da compilação de estudos biológicos por meio de um sistema de gestão de bases de dados relacional (SGBDR) de código aberto; 3) armazenamento e representação de eventos e distribuição de dados geográficos na ferramenta de um sistema de informação geográfica de código aberto; 4) disseminação de dados online através da criação de um web map interativo usando uma biblioteca JavaScript de web mapping de código aberto. Nesta dissertação, a estrutura dos metadados e a base do projeto COBIO-NET, que será usada para armazenar os dados de invertebrados marinhos obtidos durante o projeto. O conjunto de dados piloto desenvolvido durante esta dissertação, apresenta um layout com 26 campos Darwin Core, e contém um conjunto de dados referente a 7486 ocorrências de crustáceos decápodes em mangais, pradarias marinhas, corais e outras áreas costeiras de Moçambique e São Tomé e Príncipe. Este modelo de metadados é adequado para a recolha de informação pré-estruturada de acordo com o formato de dados usado pelo GBIF. Ferramentas digitais tais como o software Open Refine e a linguagem de programação Python foram usadas para criar um conjunto de dados, através da compilação e limpeza de dados de ocorrências de biodiversidade obtidos a partir de repositórios digitais, dados obtidos diretamente de outras fontes e literatura científica, agregados em um conjunto de dados detalhado. De forma a poder realizar uma análise geográfica, é necessário que os dados incluam os locais de recolha na forma de coordenadas espaciais. Nos casos em que os registos obtidos não incluíam esta informação, a georreferenciação foi feita utilizando o software GEOLocate. A base de dados PostgreSQL construída durante este estudo e o suporte digital usado para gerir e processar informações sobre crustáceos decápodes de Moçambique e São Tomé e Príncipe. Os dados da base de dados podem ser filtrados por meio de consultas e a base de dados pode ser atualizada pelos investigadores do COBIO-NET com mais dados referentes a outros grupos taxonómicos de invertebrados marinhos. O QGIS foi o sistema de informação geográfica de código aberto utilizado para visualizar, processar e avaliar os dados e informações geográficas recolhidas. A avaliação geográfica, usando o QGIS, envolveu vários passos, como processamento de informações geográficas, mapeamento de diferentes habitats, combinação de camadas de informação e personalização da simbologia existente. O design do mapa QGIS foi projetado especificamente para o projeto COBIO-NET, oferecendo uma base para analisar informações sobre incidência e alocação de espécies. O projeto de mapeamento em QGIS permite a sua aplicação a outros conjuntos de dados mais amplos, incluindo informação sobre outros invertebrados marinhos. O plugin qgis2web para o QGIS foi utilizado para produzir um mapa interativo em JavaScript, tornado público na internet, personalizado através da biblioteca Leaflet que permite visualizar as ocorrências das espécies de crustáceos decápodes. O mapa fornece vários filtros para manipular os dados, permitindo a visualização de ocorrências de acordo com critérios específicos. Este mapa inclui 18 camadas que podem ser escolhidas ou não para filtrar as informações visualizadas, e são categorizadas em (1) ocorrência de espécies, (2) habitat, (3) áreas dos países e (4) zonas costeiras globais. Ao longo desta dissertação, foram usadas várias ferramentas e técnicas, que apresentaram vários desafios. A limpeza e validação de nomes científicos no conjunto de dados de biodiversidade foi um deles. O campo da taxonomia está em constante mudança, dificultando a compreensão de quais termos descritos correspondem ao nosso conhecimento contemporâneo de uma espécie em particular. As limitações também se estendem aos shapefiles de habitat usados neste estudo. A maioria dos conjuntos de dados possui cobertura global e foi compilada a partir de várias fontes de dados de qualidade e a escalas variadas para as quais a interpretação da imagem foi realizada. Outra limitação foi o mapa em JavaScript gerado com o plugin qgis2web no QGIS. Embora o plugin possa simular muitos elementos do QGIS, incluindo símbolos e estilos de camada, não consegue replicar aspetos mais complexos. Os dados recolhidos no conjunto de dados podem ser partilhados através de repositórios online, a fim de serem usados, por exemplo, em estudos de distribuição de espécies e avaliar a composição de comunidades ecológicas distintas, para estimar a probabilidade de extinção e preservação da biodiversidade. Outra aplicação deste trabalho é permitir a criação de uma coleção de dados de referência alargada a outros invertebrados marinhos de Moçambique e São Tomé e Príncipe, que seja disponibilizada a comunidade cientifica e ao público em geral de forma a dar a conhecer a biodiversidade e história natural destes países africanos. Uma das ideias do projeto COBIO-NET é gerir e centralizar todos os conjuntos de dados de biodiversidade produzidos durante o projeto e a documentação associada com recursos a ferramentas multimédia, num repositório digital. Este repositório será usado para disseminar as informações e dados reunidos para a comunidade científica e o público em geral. Portanto, o conjunto de dados, mapas QGIS e mapas interativos produzidos durante esta dissertação serão incluídos no repositório digital COBIONET para maior disseminação da informação a investigadores e sociedade em geral. Além disso, as características do conjunto de dados desenvolvido, que integra um conjunto de dados de biodiversidade de invertebrados marinhos estruturado em DwC, a base de dados, os mapas e o mapa online serão publicados em artigos científicos, data papers e repositórios digitais (GBIF e COBIO-NET) no âmbito do COBIO-NET, em colaboração com outros investigadores do projeto. Adicionalmente, ao serem disponibilizados ao público, estes dados e ferramentas digitais podem ser usados por outros utilizadores como ferramentas de ensino ou divulgação, para escrever livros, artigos científicos, folhetos de divulgação, etc. Os crustáceos decápodes são elementos relevantes da dieta e meios de subsistência das populações locais de Moçambique e São Tomé e Príncipe. Neste contexto, os resultados obtidos nesta dissertação são relevantes na medida em que podem ser usados para ligar o conhecimento destes recursos naturais ao seu valor gastronómico nestes dois países, bem como aos Objetivos de Desenvolvimento Sustentável (ODS) das Nações Unidas, a saber, o ODS #2 (Erradicar a fome), que visa acabar com a fome, alcançar a segurança a alimentar e melhorar a nutrição; e o ODS #14 (Proteger a vida marinha), que se refere a biodiversidade marinha e costeira, sua conservação e uso sustentável para um desenvolvimento sustentável da sociedade humana.
The quantity of biological data accessible in online repositories is exponentially growing, thus computer science methods are required for its management and analysis. Online, digital repositories are useful instruments for biodiversity research, as they provide fast access to data from different sources. Among these, large contributors are museums that hold a vast quantity of specimens in their collections. This dissertation was developed as part of the COBIO-NET project, funded by FCT/AGA KHAN Foundation, and its goals were to create a comprehensive dataset on the marine coastal biodiversity of decapod crustaceans through different habitats in Mozambique and Sao Tome and Principe, and to use digital tools to disseminate the compiled information online, so that its available to the scientific community and the general public. These digital tools have been used to aggregate, georeference and clean up global biodiversity data retrieved from online digital repositories, biodiversity data and scientific literature into a detailed dataset; to manage and structure biodiversity data for the compilation of biological studies through a relational database management system; to manage and process data through, also to show the acquired spatial data in the geographic information system QGIS and an interactive web map. In this dissertation, a metadata structure was defined, which will be further used to store data collected during the COBIO-NET project. This metadata structure includes 26 fields defined by the Darwin Core metadata standard. A pilot dataset, based on this metadata structure was compiled, including 7486 decapod crustaceans occurrences records in Mozambique and Sao Tome and Principe. The database PostgreSQL constructed during this study is the digital support to manage and process information on decapod crustaceans from Mozambique and Sao Tome and Principe. The data from the database can be filtered through queries, and this database is ready to be updated by researchers enrolled in COBIO-NET with more data from different marine invertebrate taxonomic groups. The QGIS map design provides maps to visualize decapod crustacean occurrences, offering the foundation for the analysis of species incidence and allocation information. The map project is prepared in a way that it can be used to display information on larger datasets, including information on other marine taxonomic groups added during the COBIO-NET project. A web map was constructed using Leaflet and is an interactive digital platform, that allows the visualization of decapod crustacean occurrences through mangroves, seagrasses, corals and other coastal areas of Mozambique and Sao Tome and Principe. The web map provides distinct filters concentrations to manipulate the data, allowing visualization of occurrences events according with specific demands. A dataset of biodiversity data, representing occurrence records, was compiled and the digital tools developed during this study will be published and disseminated through online digital repositories, that can be used in future studies to model crustacean species allocation studies. To evaluate species communities in an effort to estimate their probability of extinction and to preserve biodiversity. These data as well as the digital tools, and their following publication further adds and promotes our current knowledge on biodiversity of marine crustaceans in mangroves, seagrasses, corals and other coastal areas of Mozambique and Sao Tome and Principe.
Ferreira, Gustavo Castanheira. "Base de dados georreferenciada sobre a Reserva Ecológica Nacional Contributo para a criação de uma ferramenta de apoio à gestão da REN à escala regional." Master's thesis, 2017. http://hdl.handle.net/10362/30070.
Full textMagnoni, Pedro Henrique Jandreice. "Cartografia da paisagem natural do Parque Natural de Montesinho por Sensoriamento Remoto." Master's thesis, 2017. http://hdl.handle.net/10198/14405.
Full textVisando a utilização do sensoriamento remoto na monitorização de ecossistemas de elevado valor conservacionista, o presente trabalho teve como objetivo desenvolver uma metodologia capaz de identificar de forma expedita a ocorrência dos carvalhais da Quercus pyrenaica Willd., espécie de valor ecológico alto no Parque Natural de Montesinho (PNM), localizado na região nordeste de Portugal, através de ferramentas do sensoriamento remoto e utilização de sistemas de informação geográficas livres. Com base em informação espectral de diferentes composições de bandas de uma imagem Landsat 5 Thematic Mapper (TM), foram aplicadas classificações não-supervisadas mediante o SPRING para diferentes índices de similaridade no processo de segmentação da imagem. Com a utilização do QGIS, as classificações foram comparadas com a cartografia de referência para determinar as classes que melhor representaram o carvalhal, e foi verificado que o índice de similaridade 8, com a inserção de todas as bandas espectrais, foi aquela que melhor reconheceu a assinatura espectral do carvalhal no parque. A partir dessas classes, foram extraídas regiões potencias para a tomada de amostras para aplicação de um classificador supervisado que possibilitou a elaboração de um mapa temático das áreas de carvalhal no PNM. Mediante uma verificação no terreno, alguns resultados interessantes como a discriminação do carvalho em diferentes estágios de seu crescimento vegetal e abundância associado a outras espécies, mostram a capacidade de detecção da assinatura espectral do carvalhal da metodologia aplicada.
Aiming the use of remote sensing in the monitoring of high conservation value ecosystems, the present work aimed a methodology able to identify the occurrence of the of the Quercus pyrenaica Willd., a specie of high ecological value in the Natural Park Of Montesinho, located in the northeast region of Portugal, through remote sensing tools and the use of free geographical information systems. Based on spectral information from different band compositions in Landsat 5 Thematic Mapper (TM) images, non-supervised classifications were applied using SPRING by different similarity indexes in the image segmentation process. Using the QGIS, the classifications were compared with the reference cartography to determine the most representative classes of the Quercus pyrenaica Willd., verifying that the classifications performed for the similarity 8 index with all image spectral bands was the one that best recognized the oaks spectral signature. From these classes, potential regions were extracted for the sampling and application of a supervised classifier that enabled the thematic map of the oak areas in the PNM. By field verification, interesting results such as the discrimination of the oak at different plant growth stages and abundance associated with other species, showed the ability of oak spectral signature detection by the applied methodology.
Tedeschi, Alexander. "Rebalancing citi bike : a geospatial analysis of bike share redistribution in New York City." Master's thesis, 2016. http://hdl.handle.net/10362/17842.
Full textThis study provides a model to rate and visualize the bicycle redistribution of Citi Bike, the bikeshare system that operates in New York City. The share of rebalanced bicycles in proportion to total rides sharply decreased in the spring of 2015, which prompted the question as to what impact, if any, this change in operations had on the availability of bikes and the system’s ability to relay bikes to empty stations. In terms of public transit, a bikeshare system is only as effective as its ability to respond to commuter supply and demand. In order to circumvent the absence of data about redistribution routes and times utilized by Citi Bike’s operations team, publicly available trip data was reverse-engineered in order to recreate the rebalancing events over the three years of the bike share’s operation (2013-2015). Pairwise correlation revealed the stations between which bikes are transferred the most. Data on availability per station, derived from an accumulated JSON feed was integrated in order to derive an hourly score per station. The durations of consecutively empty and full stations were analyzed. Finally, a k-means clustering analysis of availability events was performed in order to visualize the spatial patterns of bicycle supply and demand. A negative correlation was found between the amount of rebalanced bicycles and the performance of stations based on indicators such as emptiness, fullness, and deliveries per empty instants.
Monteiro, António Figueiredo. "Modelação de um SIG para a Cartografia Geotécnica com recurso a plataformas de código aberto e livres." Doctoral thesis, 2020. http://hdl.handle.net/10400.6/10328.
Full textIn urban areas, the cartographic execution is confronted with their permanent reorganization, either by the appearance of new constructions or by the reorganization of existing area, namely in rehabilitation buildings ’areas. Particularly in geotechnical cartography, the urban reorganization allows the observation and realization of excavations, foundations, trenches, drilling sampling wells and holes, which constitute a great data collection for geotechnical cartography, being the main difficulty the minimum temporal and spatial exhibition of the natural land. The use of Geographic Information Systems (GIS) in the geotechnical cartographys’ development has taken a significant step by using geographic databases, new analysis tools and, more recently, the use of free software and platforms. Methodologies for using data from free geographic information platforms (Google maps, Bing maps and OpenStreetMap) were developed throughout this work. These data, properly processed in free open source software (QGIS), may contribute to the elaboration of geotechnical cartography. This work shows the demonstration of the tool covering several themes: delimitation of areas that identify the degree of granite alteration, friction angle, maximum allowable load capacity and hazard map (two-variable map, slope and degree of granite alteration). Other issues may be addressed, such as the delimitation of areas with the degree of fracture of the rock mass, mechanical parameters, or other derived from geology for engineering and/or geotechnical information. The use of these platforms makes it possible to close the time limit mentioned above, as it allows in some cases to have access to images collected during the excavation work, containing important data for the geological and geotechnical characterization of the area under study. Regarding the characterization of the degree of granite alteration, it was initially made through modules connected to the streetview platform and in a second phase with in situ observation. We verified that there were no significant differences between the two samples. We performed a statistical analysis using SPSS version 25 through the t (student's t-test) test for the paired samples of the collected information and found that there were no significant differences between the use of the Google Street View imagery and the in-situ observation. Finally, in order to obtain three-dimensional information, the Digital Terrain Model (DTM) was generated, which later allowed the slope map to be generated. Some of the themes were superimposed on the DTM, thus obtaining a three-dimensional representation of the same theme. These maps can be represented using a web browser, allowing the rotation and translation of this three-dimensional model.
Medrado, Matheus Cardoso. "Modelos matemáticos de simulação hidráulica como ferramenta de apoio à gestão da pressão em sistemas de distribuição de água: caso de estudo." Master's thesis, 2019. http://hdl.handle.net/10400.8/3967.
Full textNERAD, Jiří. "Návrhy využití geografických informačních systémů v hodinách zeměpisu na základních a středních školách." Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-371745.
Full textAquilino, Mariella. "Earth Observation for Sustainable Development Goal 11: methods and tools in support of policies for resilient and inclusive cities." Doctoral thesis, 2022. http://hdl.handle.net/11589/237618.
Full textThe work aims to implement methods and tools based on Earth Observation (EO) data in support of Sustainable Development Goal (SDG) 11 of the United Nations (UN) 2030 Agenda: “Make cities and human settlements inclusive, safe, resilient and sustainable.” EO data have been recently recognized as a fundamental source of information for SDG indicators estimation. The spatial distribution of population and settlement layers, derived by EO-based surveys and methodologies, are specifically considered essential variables requested for quantifying SDG 11 indicators. However, the complexity of EO data handling and processing makes difficult the integration and usage of such data in SDGs monitoring strategies adopted from local policy makers. Furthermore, Local and Regional Authorities (LRAs), who daily facing urban growth pressures that affect the big cities, require indicators at the intra-urban scale to design adequate policies to foster the achievement of SDG 11, whereas the scientific community provides only national, regional and city scale indicators. To fill such gaps, this work proposes an improved vector-based dasymetric method (available in different versions and implementations) with the aim to provide both updated and more reliable population density maps at high spatial resolution 100 x 100 m. Concerning the settlement maps, the study proposed two different automatic classification procedures, data-driven pixel-based or, alternatively, knowledge-driven object-based. The satellite data selected as input are multi-seasonal and cloud free Sentinel-2 images, freely downloadable from the European Space Agency (ESA) Copernicus Open Access Hub. Grid population map and settlement layer (only buildings) were used as input to implement SDG 11.3.1 — “Ratio of land consumption rate to population growth rate” indicator, i.e., Land Use Efficiency (LUE) indicator. By integrating the essential variables with other domain-specific information, e.g., cadastral data, street network, air particle pollutants and natural hazard maps, additional SDG 11 indicators/sub-indicators (e.g., SDG 11.1.1, 11.2.1 and 11.6.2) can be computed at the local level. When observed over time and per unit area, the obtained indicators can provide trends useful for the progress monitoring of the UN 2030 Agenda. A set of automatic tools, devoted at the automatic computation of inputs of SDGs 11 indicators, were developed to make procedures reproducible for various cities. A Quantum GIS (QGIS) plugin and a cloud-based platform were used for sharing and facilitating the invocation of scientific workflows for all potential stakeholders without extensive expertise on the EO domain. In the Bari study area, all the indicators listed above — as well as their changes (2011–2020), when data are available for different epochs — were quantified for both the total population and the regular migrant population components, with distinctions drawn between nationalities of origin. The evaluation of the population growth rate and indicators evidenced, in Bari, that native and regular migrant components are settling according to different logics. The proximity to central areas where schools, hospitals and other services, as well as easier access to public transportation (SDG 11.2.1 indicator), appears to favour the growth of migrant communities. Native residents, instead, appear to have moved to the newly built residential areas of the suburbs. Thus, these findings stress the great impact of the proposed intra-urban scale implementation of indicators SDGs 11 in designing evidence-based policies, which reserve attention to social cohesion and inclusion issues.