Dissertations / Theses on the topic 'Geodetic surveying'
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Summerfield, Philip John. "Kinematic GPS surveying." Thesis, University of Nottingham, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254471.
Full textDavison, M. "Refraction effects in precise surveying measurements." Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378767.
Full textSutisna, S. "The three-dimensional combination of absolute and relative coordinates derived from satellite and terrestrial methods." Thesis, University of Newcastle Upon Tyne, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233314.
Full textVan, der Merwe Helena. "Development of a numerical tool for the optimisation of vascular prosthesis towards physiological compliance." Master's thesis, University of Cape Town, 2007. http://hdl.handle.net/11427/3479.
Full textIt has been proposed that if a vascular prosthesis is to more closely approximate the mechanical behaviour of a native vessel, it should similarly feature a multi-component structure. One of the components could be a metal support structure, similar to an endovascular stent. The objective of the project was to develop a numerical tool, using the Finite Element Method (FEM) to aid in the development and optimization of such a metallic support structure. This tool was used to simulate the behaviour of different designs under the simulated in vivo conditions. The numerical results of the predicted mechanical behaviour are then analysed.
Raubenheimer, Jacobus Hendrik. "Geographic information system as a map and survey database for a selected area." Master's thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/9260.
Full textThe purpose of this research was to identify how the distribution and availability of spatial data could be improved. This should then minimize the duplication of data and ensure a better utilization of available data sources. All decisions that are made should be based on information, and especially decisions about our natural resources should be based on geographical information - this is spatial information of our environment. Many users, however, are not aware of the spatial data available or where to find it. In Chapter 2 the literature review reports on the spatial data sources in other countries, and different methods that are used to make this data available to the users. Most of the research was done on the distribution of digital data, and not much on traditional non-digital material. The establishment of national land information systems and data sharing via the networking of databases is receiving wide attention. An investigation was done to establish the spatial data suppliers and the data users, the types of data supplied, and the requirements. Three possible methods were investigated to improve the distribution of spatial data and•to reduce the duplication of data: a comprehensive GIS with a full database; a national spatial data infrastructure (NSDI); a metadata base.
Matthews, Mark Walter. "A machine vision based non-contact measuring tool for mensuration in industry and manufacturing." Master's thesis, University of Cape Town, 1994. http://hdl.handle.net/11427/17012.
Full textThis thesis report discusses the design, implementation and testing of a non-contact measuring tool based on the principle of stereo photogrammetry. The system uses a pair of CCD video cameras and a frame-grabber in a PC to capture the pair of images this requires. The software on the PC then measures the image co-ordinates of points selected by the user and transforms them into space co-ordinates for the points. The transformation requires knowledge of the relative positions and orientations of the cameras. This is found in a calibration stage from images of a calibration frame. The cameras are mounted on a bar, which guarantees that the relative positions and orientations of the cameras remain invariant within certain limits. This makes the system portable.
De, Wet Francois Johan. "Data capture of geometric data for local authorities' geographic information systems." Master's thesis, University of Cape Town, 1995. http://hdl.handle.net/11427/14953.
Full textThis thesis describes research and development work which led to algorithms, procedures and computer programs which facilitate the cost effective and accurate capture of geometric data. The geometric data for a Geographical Information System (GIS) at a local authority or municipality consist of a number of different data sets. These include inter alia: the cadastral information, zoning information, servitudes, building lines, the outlines of improvements and the reticulation networks and the house connection points of the engineering services. The initial capture of the geometric data appears to be deceptively simple and is often not given the required consideration. The initial data capture phase of GIS projects is usually a difficult and time consuming process. This is even more so in the case of GIS for local authorities. The reason for this difficulty is the large volume of data coupled with the high accuracies required for the cadastral base map and the engineering services. Input facilities of most commercial GIS software packages generally do not provide the most efficient means of data capture. This problem warrants the development of techniques and procedures specific to local authority GIS applications which ensure that data capture can be done effectively and efficiently. The major benefit of these procedures is that they can be implemented on personal computers with low random access memory capacity. This eliminates the need for investment in costly equipment at the initial stage of data capture in the development of a GIS. It allows the capture of data on low cost technology and the postponement of the purchase of an expensive system or workstation until the data capture phase has been completed. The lowest personnel skills required are copy typing in contrast to the traditional methods of using CAD operators who command higher salaries and require more expensive training. The system developed by the author is more productive, both in quality and volume of work produced, than the CAD approach. It also permits the delay of purchase and training on expensive GIS software and hardware, which may be obsolete by the time the graphic database is established.
Nel, Lance. "A mathematical model for least squares point determination from cadastral data." Master's thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/16085.
Full textTransnet possesses approximately 60000 land parcels covering the whole of the South African rail network. These parcels, or polygons, will form the base map in a corporate Geographic Information System (GIS) which will be used for property administration and general railroad operations management. Accuracy requirements are high and unique coordinate values have to be determined for each polygon apex before data are input into the GIS. Railroad property portfolios are characteristically configured in long thin strips. The solution therefore has to cope with poor geometry. The method used to determine apex coordinates must be time and cost efficient, and produce acceptable levels of precision. This study examines the feasibility of using a particular mathematical model with the least squares method in the partial automation of the determination of unique points from sets of differing and, at times, conflicting cadastral data for the creation of a digital cadastral database. The approach is not a mathematically rigorous conventional survey network solution, but a pragmatic application of least squares and network principles, to suit the nature and limitations of the data.
Cammidge, Mark. "The design of a digital photogrammetric metrology system for the semi-automated surveying and recording of pipe dimensions in industrial plants." Master's thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/17477.
Full textThis thesis reports on the design, development and testing of a semi-automated system to aid in the mapping of the interior of industrial plants. The system makes use of digital photogrammetry to assist an operator in locating and identifying components of the plants. All of the important photogrammetric theory is discussed in the text, and explained in detail in the appendices. Specifically, this system implements various algorithms used for camera calibration, object point intersection, and a method combining the two techniques. Considerable use is made of the iterative least squares method, which is the basis of many of the algorithms employed in this work. Image processing algorithms are implemented to enhance the digital images, and to ease the identification of objects in the images, and these are fully explained in the text. Adaptive least squares image matching is a method of matching corresponding points in different images and is used to ensure correspondence between points identified by the system operator. A weighted centre of gravity method is used to find the centre of target areas, and an algorithm is implemented to determine the radius, centre and direction of a pipe passing through a number of points. Various aspects of the system design are discussed and explained. In particular the requirements in terms of hardware and software are presented. In addition, the choices of the operating system and of the compiler are justified. Potential problems with the system, and possible enhancements of it are also described. Tests were performed to verify the correct operation of all of the algorithms used in the calibration of the cameras. Together with the point intersection routines, these tests calculated the position of various control points, the correct coordinates of which were previously known. The calculated point positions are compared to the known coordinates of the points to determine the accuracy of the various algorithms. Further tests were conducted to demonstrate and verify the ability of the system to measure distance in three dimensions. These tests illustrate that the accuracy achievable is approximately 0.053 of the total distance measured for an object occupying 803 of the width of the image. The system improves considerably on the method presently used in South Africa and in many industries worldwide which rely on analytical photogrammetry for the determination of object point locations. While the system suffers from reduced accuracy as a result of the use of digital cameras, this problem will become less important as technology and digital camera resolution improve. Possible enhancements include the use of more numerically efficient algorithms, and the introduction of techniques that would partially automate the identification of control points and pipes.
Combrinck, Willem Ludwig. "Antenna axis offset and intersection determination using GPS." Master's thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/17478.
Full textModern geodesy utilises advanced space techniques such as VLBI to further the study of crustal motion as well as tidal and rotational deformations of the Earth. One of the parameters in the model used to determine the baseline length between VLBI stations, is the antenna axis offset. This offset is the distance between the secondary axis and the normal projection of the secondary axis onto the primary axis. For a non-intersecting axes antenna mounting, this offset is usually several metres in length. The accuracy of the offset value directly influences the total accuracy of the VLBI results. This work describes how GPS is used to determine the offset and VLBI reference point. Several algorithms for calculating these parameters are investigated and evaluated. Methods are developed to minimise the size and influence of errors. An evaluation and comparison of the results to previous independent determinations of the offset, which use different techniques and instrumentation, clearly show the feasibility of using GPS. This method has the added advantage of allowing the VLBI, SLR and GPS reference frames to be co-located.
Lovecký, Marek. "Geodetické práce při rekonstrukci městské silniční křižovatky v Uherském Hradišti." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226221.
Full textGunár, Peter. "Geodetické činnosti při rekonstrukci povrchu dálnice D1." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-400153.
Full textCraigie, Dirk Hamish. "The development of a non-contact co-ordinate measurement machine." Master's thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/17479.
Full textThe Department of Surveying and Geodetic Engineering at the University of Cape Town, in conjunction with the Department of Mechanical Engineering at the University of Cape Town have developed a non-contact co-ordinate measurement machine in a project called MILIMAP. The project had the following objectives : 1. To determine unique surface co-ordinates for continuous, complex objects with submillimetre accuracy. 2. The representation of the co-ordinates was to be in a format that could be utilised by a computer numerically controlled (CNC) milling machine in a computer aided design/ computer aided manufacture (CADCAM) environment. 3. The device had to use a non-contact method for data capture. The MILIMAP project was undertaken because there is a demand for co-ordinate measurement machines in industry for the inspection of objects for quality control purposes. Conventional Co-ordinate Measurement Machines (CMMs) are expensive and use a contact probe to measure the object. The contact probe measurement technique is unsuitable for the measurement of non-rigid objects such as shoes and automobile seat padding. The MILIMAP system provides a noncontact measurement technique that can be applied to non-rigid as well as rigid objects. Additional applications in the archaeological field exist for the non-contact measurement of sensitive, historical artefacts. A digital photogrammetric system was developed to measure the position of a laser dot projected onto the surface of the measurement object. This measurement system satisfied the criteria of a non-contact measurement method required for the project. The system utilised three digital CCD cameras to capture images of the laser dot projected onto the object. Image processing software, developed from existing software within the Department of Surveying and Geodetic Engineering, was used to photogrammetrically determine the co-ordinates of the laser dot to sub-millimetre accuracy on the surface of the object. A mechanical device was designed and constructed by the Department of Mechanical Engineering in order to move the laser over the surface of the object, and to rotate the object. The entire surface of the object could be measured by the system using these operations.
Barancová, Simona. "3D model vybraného objektu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-390214.
Full textAdámať, Martin. "Geodetické činnosti při stavbě podchodu pod železniční tratí." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-400133.
Full textAittamaa, Christina. "Inmätning av fastigheten Hållsta 2:3, Hudiksvall." Thesis, University of Gävle, Department of Technology and Built Environment, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-228.
Full textDetta projekt har genomförts på mark- och mätningsavdelningen i Hudiksvalls kommun och projektets område är beläget norr om Hudiksvall, ca 6 km från centrala Hudiksvall vid norra infarten till E4:an.
I området ligger en friskola, en gymnasieskola som heter ”Glada Hudik-skolan”. I skolans lokaler har det tidigare bedrivits hotellverksamhet i många år, f.d. Hammering Hotell. Hösten 2006 öppnade skolan sina portar och de räknar med att öka antalet elever varje läsår. I närheten av skolan finns den kända travbanan, Hagmyren.
Syftet med arbetet var att göra en inmätning av fastigheten Hållsta 2:3, eftersom det inte fanns några inmätningar där tidigare. Stompunkter mättes in både i plan och höjd, därefter gjordes det detaljmätningar. Koordinatsystemet i plan i Hudiksvall är RTR10 2.5 gon V 0:- 15 och i höjd RH 70. Efter stom- och detaljmätningarna konstruerades en primärkarta i Geosecma som är ett kartprogram.
I den här rapporten kommer mätmetoder, beräkningar, dokumentation och kartframställning att redovisas.
Målet med projektet är att kommunen skall få nytta av inmätningarna i framtiden för olika projekteringar och att jag skall få mer erfarenhet av både mätning och kartframställning. Jag får även kunskaper om hur det går till på arbetsplatsen, tankegångar kring ett projekt och lärdomar av att arbeta självständigt.
Melin, Linda, and Malin Marthinsson. "En studie om att förbättra registerkartan med mätning och transformation." Thesis, University West, Department of Engineering Science, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-1831.
Full textVi har gjort en studie om hur vi kan förbättra registerkartan med hjälp av mätning med GPS och transformation i området Tobyn i Årjängs kommun. Arbetet innehåller fastighetsbildning förr i tiden och även om hur fastighetsbildning går till i dag. Vidare har vi skrivit om olika mätningsmetoder och fakta om GPS-systemet, exempelvis NRTK, fasmätning, absolutmätning och kort om olika transformationsmetoder. Vi har också skrivit om hur vi gick tillväga när vi först mätte och sedan transformerade. Till detta har vi olika bilagor med jämförelse mellan inmätta och transformerade punkter och kartor som visar hur mycket som skilde mellan transformerade gränser och den befintliga registerkartan. Det finns också en bilaga med flygbild över Tobyn som visar något av hur mätförhållandena är. Vår slutsats är att det gick väldigt smidigt att mäta och transformera och tidsåtgången var inte så stor. Det skilde upp till 75 centimeter mellan transformerad och inmätt punkt på vissa ställen. De största avvikelserna fanns i utkanterna av området Tobyn.
Kofira, Matej. "Porovnání práce geodeta v Norsku a v České republice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-390202.
Full textWidmalm, Sven. "Mellan kartan och verkligheten : geodesi och kartläggning 1695-1860 /." Uppsala : Uppsala Univ, 1990. http://catalogue.bnf.fr/ark:/12148/cb357040754.
Full textRozehnalová, Magda. "Design totální stanice." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229357.
Full textBueno, Régis Fernandes. "Monitoração, por GPS, de deslocamentos em estruturas com carga dinâmica." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-08012008-144719/.
Full textThe dynamic monitoring of road bridges though spatial displacements is one of the geodetic areas of interests. The satellite positioning technologies are one of the disposed tools for this task and were evaluate by present research. One verifies that GNSS can contribute for the dynamic monitoring of structures, and has applied for this task in the last years to large cable stayed bridges on Asia, on Europe and on North America. On the present study, one analyses the use of this technology in a more rigid structure, tied to a unique reference network and under Brazilian region conditions. Were realized essays over a shaker on USP Geodetic Instrumental Calibration Base and over the Imigrantes Roadway Ascending Viaduct 19 employing the GPS technology and modal analysis. By determinations in the kinematics relative method ones obtain the tridimensional displacements and the frequency of first modal shape of the structure. The applied methodology and its obtained results demonstrate the potentiality of this method for more rigid structure too, and under Brazilian region characteristics. At the end is proponed a Methodological Basic Proposal for Dynamic Charged Structure Monitoring thru GNSS Employment.
Klouda, Martin. "Rozvoj malého podnikatelského subjektu." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2007. http://www.nusl.cz/ntk/nusl-221396.
Full textMatela, Motlotlo P. "The Lesotho geodetic control network." Thesis, 2001. http://hdl.handle.net/10413/5441.
Full textThesis (M.Sc.Sur.)-University of Natal, Durban, 2001.
郭基賢. "A study of Taiwan crustal movement with geodetic surveying data." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/05635252269294998884.
Full text國立彰化師範大學
地理學系
92
Taiwan is fallen in the collision area of Philippine Sea Plate and Eurasian Plate. The interaction of the subduction and collision of these two plates is the primary power source to the tectonic activity of Taiwan and neighboring area. Therefore, the crust is very unstable, and the frequent earthquake is the evident representation. There are a lot of research methods for movement of crust. In these years, the geodesy method has been the primary tool. In these three decades, many scholars discussed the crust movement of Taiwan area by adopting the geodetic survey data. The data used include the triangulation point, level point, and GPS control point. Most of the research scope are partial-area and the surveying periods are not long. Consequently, to discuss the crust movement of several decades in Taiwan area, this research integrate the triangulation point, level point, and GPS control point for many particular periods. Then implement the coordinate conversion, calculation and overlap theme map as well as compare and analysis of the horizontal and vertical movement. From this research, we could know, with the GPS control point, can achieve better study on the horizontal movement of the crust. As for the vertical movement, with the data of Leveling can achieve better results. On the horizontal movement, the deformation of north Taiwan is comparatively small. In I-lan area, the movement is south-south eastward. In Kaohsiung and Ping-tung area, the movement is south-westward. The other points are north-west to south-east. The direction conforms with the plate movement. From the displacement velocity, we know the variation rate from the Western Foothills belt to Hua-tung area is much larger than that of the other direction. Therefore the crustal horizontal movement of the east and central area is more severe than the other area. From the vertical movement, we know the primary uplift area include, (1) I-lan San-tiao-chiao area, (2) outskirts Taipei basin from Chu-tzu-shan, Ta-t’un-shan to Tan-shui Lin-tzu area, (3) T’ao-yuan, Ta-hsi to Ch’i-lan area, (4) Huan-shan to Ch’i-lan area, (5) T’ai-chung, Li-shan to Hua-lien Ch’ung-te area, (6) T’ai-chung, Nan-t’ou 921 Earthquake Area, (7) Foothill Belt outside Chia-I Shui-shang to Chang-hua Yuan-lin, (8) Yu-shan Mountain Range between Chia-hsien and Yu-shan, and Provincial Road No. 20 locating at Central mountain Range area, (9) area of Yu-shan Mountain Range surrounded by Ch’i-shan, Mei-nung, Liu-kuei and Chia-hsien, (10) Provincial Road No.1 extending from Lu-chu, Tso-ying to Kaohsiung, (11) both side of Lu-yeh and Ch’ih-shang longitudinal valley and west side near Central mountain Range area of northern segment of longitudinal valley. The primary subsidence areas include, (1) Provincial Road No.2 from San-chih to Su-ao coastal area(except San-tiao-chiao), (2) I-lan subsidence area from Ta-t’ung to I-lan plain, (3) strip subsidence area through Taipei, His-chih to Chi-lung, (4) coastal subsidence area of western plain, (5) strip subsidence area from T’ou-she to Sung-mao, (6) Coastal Rang fault subsidence side of longitudinal valley area, Pei-nan, Coastal Rang partial area and Wu-lu, Ch’u-lai to Hai-tuan area, (7) from western side of foothill belt of Chang-hua,Yuan-lin, Chia-I and T’ai-nan to coastal area, (8) Sung-mao, Jen-ai and toward westsouth through Pu-liu, Chu-shan, Lin-nei to Tou-nan area, (9) coastal area from Lin-pien to Fang-shan. The earthquake is accompanied with the earthquake fault usually. Comparing the mapping result, we found that most of the points with extraordinary uplifting-sublicensing rate increase, fall into the area earthquake happened frequently and the fault existed.
PROKŮPKOVÁ, Nikola. "Geodetické práce v průběhu realizace nového stavebního objektu." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-113845.
Full textKONEČNÝ, Jakub. "Aplikace geodetických metod sběru dat při zaměřování polohopisných a výškopisných prvků krajiny." Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-51155.
Full textTRAPEK, Filip. "Zaměření části areálu Jihočeské univerzity v Českých Budějovicích a grafické zpracování plánu velkého měřítka." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-317648.
Full textČTVRTNÍK, Vladimír. "Polohová a výšková detekce části areálu Jihočeské univerzity v Českých Budějovicích." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-317649.
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