Hoone aerofotogramm-meetriline mõõdistamine UAV-ga
Laen...
Kuupäev
2019
Kättesaadav alates
12.09.2019
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool
Abstrakt
Magistritöö eesmärgiks oli uurida UAV kasutusvõimalusi hoone, selle fassaadi ja
katusepinna täpseks mõõdistuseks mitte orbitaalsel aerofotogramm-meetrilisel meetodil.
Eesmärgi saavutamiseks teostati andmete kogumised uuritavast objektist aerofotogrammmeetrilisel ja terrestrilise laserskaneerimise meetodil. Uuriti, kas aerofotogrammmeetriline mõõdistus on sama täpne, odavam ja kiirem alternatiiv terrestrilisest
laserskaneerimisest. Andmetöötluse tulemusena saadi mehitamata õhusõiduki tehtud
piltidest punktipilv, mida võrreldi laserskaneerimise teel saadud punktipilvega. Tööst
selgus, et aerofotogramm-meetria kasutamine hoonete mõõdistamisel on kindlasti kiirem,
lihtsam ja odavam alternatiiv kui kasutada elektrontahhümeetrit või laserskannerit.
Aerofotogramm-meetrilisel meetodil mõõdistatud punktipilvel oli detailne maapind ja
katus, kehvem fassaad. Terrestrilise laserskaneerimise puhul oli fassaad hea kuid
tehnorajatiste tõttu katus kehvem. Kehvema aerofotogramm-meetrilise meetodi
punkipilve tiheduse tõttu fassaadil ei saa selle töö puhul öelda, et see meetod on sama
täpne ja kvaliteetne kui terrestrilise laserskanneri puhul, küll aga on mitte orbitaalse
aerofotogramm-meetrilise meetodi kasutamine suurte hoonete puhul piisav, näiteks
ehitusmaterjalide mahtude leidmiseks hoone renoveerimisel.
The aim of the current Master´s thesis was to find out UAV usage options for the building´s, its facade´s and roof area´s precise surveying with the help of aerophotogrammetric method. To achieve the aim data was collected from the object under study using the aerophotogrammetric and terrestrial laser scanning methods. It was studied if the aero-photogram surveying is a precise, cheaper and faster alternative from the terrestrial laser scanning. As a result of the data processing the point cloud, which was taken by an unmanned aerial vehicle, was compared with the point cloud, which was taken by laser scanning. The study showed that using aerophotogrammetry in surveying of buildings is definitely faster, easier and cheaper than using the electrontachometer or the laser scanner. On the point cloud surveyed by aerophoto-grammetric method there was detailed ground and the roof, but the worse facade. As to the terrestrial laser scanning, the facade was good, but the roof was worse because of engineering constructions. Because of the worse density of the UAV point cloud on the facade of the building one cannot say according to this study that the method of aerophotogrammetry is as precise as using the terrestrial laser scanner. However the use of non-orbital surveying is accurate enough, for example, to find the volume of building materials when renovating a building.
The aim of the current Master´s thesis was to find out UAV usage options for the building´s, its facade´s and roof area´s precise surveying with the help of aerophotogrammetric method. To achieve the aim data was collected from the object under study using the aerophotogrammetric and terrestrial laser scanning methods. It was studied if the aero-photogram surveying is a precise, cheaper and faster alternative from the terrestrial laser scanning. As a result of the data processing the point cloud, which was taken by an unmanned aerial vehicle, was compared with the point cloud, which was taken by laser scanning. The study showed that using aerophotogrammetry in surveying of buildings is definitely faster, easier and cheaper than using the electrontachometer or the laser scanner. On the point cloud surveyed by aerophoto-grammetric method there was detailed ground and the roof, but the worse facade. As to the terrestrial laser scanning, the facade was good, but the roof was worse because of engineering constructions. Because of the worse density of the UAV point cloud on the facade of the building one cannot say according to this study that the method of aerophotogrammetry is as precise as using the terrestrial laser scanner. However the use of non-orbital surveying is accurate enough, for example, to find the volume of building materials when renovating a building.
Kirjeldus
Magistritöö
Geodeesia ja maakorralduse õppekaval
Märksõnad
magistritööd, aerofotogrammmeetria, droonid, punktipilved