Izdelava modela površja iz letalskih posnetkov – uporaba novih fotogrametričnih metod in primerjava z lidarskimi podatki : magistrsko delo

Markovič, Jasmina (author), Oštir, Krištof (mentor), Kokalj, Žiga (co-mentor)

V magistrski nalogi podrobneje preučujemo in primerjamo različne odprtokodne programe za izdelavo digitalnega modela površja. Z izbranimi programskimi paketi želimo izdelati digitalni model površja in ga primerjati z modelom površja iz lidarskih podatkov. S primerjalno analizo ugotavljamo, kakšna je razlika v višinah za območja travnikov, gozda ter stavb, katerih podatke primerjamo še s podatki katastra stavb. Namen naloge je preveriti sposobnost algoritmov za izdelavo digitalnega modela površja in z izbranimi programskimi paketi izdelati visokoločljivi model primeren za primerjavo z lidarskimi podatki. Za izbrano študijsko območje mesta Slovenj Gradec, ki ga z nekaj okolice prekriva skupaj 39 aerofotografij, je podrobneje opisan potek izdelave digitalnega modela površja in pridobljeni rezultati. Ugotovili smo, da z izbrano programsko opremo ni mogoče izdelati visokokakovostnega digitalnega modela površja. Primerjava višin katastra stavb, lidarskega digitalnega modela površja in že izdelanega digitalnega modela površja je pokazala, da so višine med seboj primerljive, za vsa odstopanja je mogoče določiti razlog, ki je največkrat sprememba v pokrovnosti površja. Na podlagi takšnih primerjav je mogoče določiti pokrovnost območij in spremembe pokrovnosti v različnih časovnih obdobjih.

• Language: Slovenian
• Keywords: grajenje strukture iz gibanja, digitalni model površja, aerofotografije, lidar, kataster stavb, pokrovnost
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publisher: [J. Markovič]
• Year: 2018
• PID: 20.500.12556/RUL-100673
• UDC: 528.7(043.3)
• COBISS.SI-ID: 8395617
• Publication date in RUL: 05.04.2018

Secondary language

• Language: English
• Title: Creation of a surface model from aerial imagery - using new photogrammetric methods and comparison with lidar data : master thesis

Abstract

In the master's thesis, various open-source programs for the production of the Digital Surface Model are examined and compared. The aim is to create a Digital Surface Model with the selected software packages and compare it to the model of the surface from the lidar data. With the help of comparative analysis we find out the difference in altitudes for meadows, forests and buildings, the data are then compared to the data of the building cadastre. The purpose of the task is to verify the ability of the algorithms for the creation of the Digital Surface Model and to create a high-resolution model with the selected software packages that would be suitable for comparison to lidar data. For the selected study area of the town of Slovenj Gradec, which is presented on 39 aerial photographs together with some of its surroundings, the course of the production of the digital surface model and the obtained results are presented in more detail. It has been found out that the selected software can not produce a high quality digital surface model. Comparisons of the heights of the building cadastre, the Lidar Digital Surface Model and the already created Digital Surface Model have shown that the heights are comparable, and it is possible to determine the cause of all deviations, which is in most cases a change in the surface coverage. On the basis of such comparisons it is possible to determine the coverage of areas and changes in the coverage at different time periods.

• Keywords: structure from motion, digital surface model, aerial photography, lidar, building cadastre, land cover