Change search
ReferencesLink to record
Permanent link

Direct link
Spatial Accuracy in Orthophoto produced using UAV Photographic Images: Lägesnoggrannhet i ortofoton framställda med UAV-foton
Karlstad University, Faculty of Social and Life Sciences. x.
2016 (English)Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
Abstract [en]

The popularity of using UAV in image-taking for the production of 3D models and orthophotos has increased over time. Karlskoga Municipality has recently acquired an UAV to produce their own 3D models and orthophotos. This project paper aims to study the geospatial accuracy of the orthophotos and DEM files produced using the images taken with their UAV. The flight takes only a few minutes but a considerable time is spent in the production processes. Difficulty is experienced in determining the right center point for most GCPs. Produced orthophotos in the software Photoscan have a resolution from 1.7 to 2.4 centimeters while DEM files have a resolution from 3.4 to 4.8 centimeters. Four orthophotos and four DEM files are produced where GCPs are used and not used and at two different flight heights, 76 and 105 meters. The spatial data of the ten GCPs are identified on the orthophotos and DEM files in ArcMap and compared with GNSS NRTK measurements and Lantmäteriet's data. A visual control in terms of completeness of data, alignment, residual tilt and scale is also done. Standard deviations in plane for orthophotos there GCPs are not used are greater than 2 meters, while there GCPs are used are around 0.7 meters. Standard deviations for DEM files are observed at 0.8 meters.

Place, publisher, year, edition, pages
2016. , 47 p.
Keyword [en]
orthophoto, DEM, UAV, UAS, Photoscan, spatial accuracy, GCP, GSD
National Category
Other Civil Engineering Other Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:kau:diva-46245OAI: oai:DiVA.org:kau-46245DiVA: diva2:972787
External cooperation
Karlskoga Kommun
Subject / course
Physical Geography
Educational program
Programme in Surveying and Cartography (120 ECTS credits)
Presentation
2016-08-23, KAU, 14:00 (English)
Supervisors
Examiners
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2016-09-22Bibliographically approved

Open Access in DiVA

StenssonExamen(3640 kB)1 downloads
File information
File name FULLTEXT01.pdfFile size 3640 kBChecksum SHA-512
160fb7e68f1da617007a4a7c1670d4c5f3e7bb2126f68c5627b2ea87bfcb6356f500d3e13b0a1f3f45e64ffdf1b140a8d7e85e282016b427556e3648e6eb5cce
Type fulltextMimetype application/pdf

By organisation
Faculty of Social and Life Sciences
Other Civil EngineeringOther Earth and Related Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 1 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 18 hits
ReferencesLink to record
Permanent link

Direct link