Terenska izmera za oceno kakovosti državnega ortofota: delovišče pod viaduktom Verd : diplomska naloga

Bratina, Špela (author), Pavlovčič Prešeren, Polona (mentor), Grigillo, Dejan (co-mentor)

V diplomski nalogi primerjamo podatke iz različnih virov z namenom ugotoviti kakovost podatkov množičnega zajema podatkov. V nalogi med seboj primerjamo položaje in višine točk, pridobljene s terensko izmero GNSS ter ortofota in digitalnega modela višin. Izmera točk je potekala pod viaduktom Verd in v bližnji okolici. V prvem delu naloge predstavimo teoretična izhodišča, kjer opisujemo ortofoto, digitalni model višin DMV 5 in izmero GNSS. Drugi del naloge predstavlja praktični del, kjer opišemo potek izmere na terenu in določitev koordinat z RTK-metodo izmere in kombinirano metodo izmere. Med seboj primerjamo položaje točk na ortofotu in položaje, dobljene z izmero GNSS ter višine točk, dobljene z GNSS-višinomerstvom in točke, interpolirane iz DMV 5. Poleg numeričnih vrednosti, ki prikazujejo odstopanja položajev oziroma višin točk, jih prikažemo tudi grafično. Zaključni del vsebuje glavne ugotovitve diplomske naloge in ideje za nadaljnje delo.

• Language: Slovenian
• Keywords: geodezija, diplomska naloga, UNI, GIG, ortofoto, DMV, RTK metoda izmere, kombinirana metoda izmere, kontrola kakovosti
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Place of publishing: Ljubljana
• Publisher: [Š. Bratina]
• Year: 2016
• Number of pages: XVI, 30 str.
• PID: 20.500.12556/RUL-85962
• UDC: 528.7(497.4Verd)(043.2)
• COBISS.SI-ID: 7695201
• Publication date in RUL: 03.11.2016

Secondary language

• Language: English
• Title: Orthophoto quality assessment from field measurements performed under the viaduct Verd

Abstract

The aim of the thesis is to estimate the quality of data from various geodetic databases. We have compared positions and elevations of discrete points from geodetic GNSS positioning to those acquired from orthophoto and national digital elevation model. Field measurements have been performed under the Verd viaduct and in the surrounding area. The first part of the thesis consists of the theoretical framework with an emphasis on the orthophoto, the digital elevation model (DMV 5) and GNSS surveying description. The second part is practical and includes description of RTK as well as combined GNSS and classical positioning we have used for positioning. Further we have compared positions from orthophoto and from GNSS surveying as well as heights, obtained from GNSS and the national digital elevation model DMV 5 interpolation. In addition to the numerical values we have used graphical elements to depict the differences in the positions and in heights separately. The thesis concludes with the main findings and recommendations for further research work.

• Keywords: orthophoto, DMV (the national digital elevation model), RTK method, combined method, quality control