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Vpliv natančnosti koordinat oslonilnih točk na fotogrametrične izdelke : magistrsko delo
Vendramin, Ana (Author), Pavlovčič Prešeren, Polona (Mentor) More about this mentor... This link opens in a new window, Grigillo, Dejan (Co-mentor)

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Abstract
Magistrsko delo »Vpliv natančnosti koordinat oslonilnih točk na fotogrametrične izdelke« zajema določitev koordinat fotogrametričnim oslonilnim in kontrolnim točkam z različnimi metodami izmere GNSS. Terenska izmera je obsegala večurno statično izmero GNSS, več ponovitev RTK-metode izmere ter prelet območja z daljinsko vodenim zrakoplovom. Opazovanja večurne statične izmere smo obdelali na več načinov, in sicer tako, da smo spreminjali minimalni višinski kot sprejema signala GNSS in modele troposferske refrakcije, uporabili različne efemeride, se navezali na različne stalne postaje GNSS ter uporabili opazovanja različnih dolžin. Položaje točk, pridobljene z obdelavo večurne statične izmere, smo primerjali s položaji, določenimi z RTK-metodo izmere. Položaje točk, pridobljene z relativno obdelavo statične izmere GNSS, smo primerjali s položaji, ki smo jih določili z absolutno metodo določitve položaja PPP z različnimi spletnimi aplikacijami. Vhodni podatek za fotogrametrično obdelavo, v kateri so bili izdelani fotogrametrični oblaki točk, DMR-ji ter ortofoti, so bile fotografije študijskega območja, posnete z daljinsko vodenim zrakoplovom, ter koordinate oslonilnih točk, določene z metodami izmere GNSS različne kakovosti. Fotogrametrične izdelke smo izdelali v programu 3Dsurvey, analizirali smo jih tako, da smo ocenili njihovo točnost na dva načina. Za oceno absolutne točnosti izdelkov smo uporabili oslonilne točke dolge statične izmere GNSS kot kontrolne točke, za relativno oceno točnosti pa smo izvedli primerjavo z referenčnimi izdelki.

Language:Slovenian
Keywords:GNSS, statična metoda izmere, RTK, PPP, TOP, ortofoto, DMR, fotogrametrični oblak točk, ocena kakovosti
Work type:Master's thesis/paper (mb22)
Tipology:2.09 - Master's Thesis
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2018
Publisher:[A. Vendramin]
UDC:528.2:528.7(043.3)
COBISS.SI-ID:8575329 This link opens in a new window
Views:1022
Downloads:526
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Secondary language

Language:English
Title:Influence of the precision of ground control point coordinates on photogrammetric products : master thesis
Abstract:
The master's thesis entitled »Influence of the quality of ground control point coordinates on photogrammetric products« covers the definition of coordinates for photogrammetric ground control points and control points using different of GNSS methods. The field measurements included a GNSS static measurement lasting several hours, several repetitions of RTK measurements and a flight over the area with a remote-controlled aircraft system. The observations of the several-hour static measurement were analysed with different parameters – changing minimal elevation angles, models of tropospheric refraction, by using different ephemerides, linking to different continuously operating GNSS reference stations and using observations of different occupation durations. The positions of the points obtained by analysing the several-hour static measurement were compared with the positions defined by the RTK method. The positions of the points obtained from a relative analysis of the GNSS static measurement were compared with the positions defined by the precise point positioning (PPP) absolute method with different web applications. The input data for photogrammetric analysis in which the photogrammetric point clouds, DSMs and orthophotos were made, were the photographs of the study area, taken by the remote-controlled aircraft system, and the coordinates of the ground control points, defined by the GNSS methods of measurement of different accuracies. The photogrammetric products were produced in the program 3Dsurvey and analysed by assessing accuracy in two ways. In order to evaluate the absolute accuracy of the products, we used points, fixed with GNSS static measurement lasting several hours as a control point, the relative accuracy was made by comparing the reference products.

Keywords:GNSS, GNSS static measurement, RTK, PPP, TOP, orthophoto, DTM, photogrammetric point cloud, quality assesment

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