Modelling 3D Topography by Comparing Airborne Lidar Data with Unmanned Aerial System (UAS) Photogrammetry Under Multiple Imaging Conditions
This study presents the effect of image data sources on the topographic modelling of part of the National Trust site located at Weston-Super-Mare, Bristol, United Kingdom, covering an approximate area of 1.82 hectares. The accuracy of the DEM generated from 1m resolution and 2m resolution LiDAR data...
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Diponegoro University
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doaj-a4018bda71254155844b70edee6687772021-03-12T09:12:36ZengDiponegoro UniversityGeoplanning: Journal of Geomatics and Planning2355-65442020-04-016212213810.14710/geoplanning.6.2.122-13816994Modelling 3D Topography by Comparing Airborne Lidar Data with Unmanned Aerial System (UAS) Photogrammetry Under Multiple Imaging ConditionsOluibukun Gbenga Ajayi0Mark Palmer1Department of Surveying and Geoinformatics, Federal University of Technology, Minna, PMB 65, Minna, NigeriaUniversity of the West of England, Bristol, United KingdomThis study presents the effect of image data sources on the topographic modelling of part of the National Trust site located at Weston-Super-Mare, Bristol, United Kingdom, covering an approximate area of 1.82 hectares. The accuracy of the DEM generated from 1m resolution and 2m resolution LiDAR data together with the accuracy of the DEM generated from the UAV images acquired at different altitudes are analysed using the 1 m LiDAR DEM as reference for the accuracy assessment. Using the NSSDA methodology, the horizontal and vertical accuracy of the DEMs generated from each of the four sources were computed while the paired sample t-test was conducted to ascertain the existence of statistically significant difference between the means of the X, Y, and Z coordinates of the check points. The result obtained shows that with a RMSE of -0.0101499 and horizontal accuracy of -0.175674686m, the planimetric coordinates extracted from 2 m LiDAR DEM were more accurate than the planimetric coordinates extracted from the UAV based DEMs while the UAV based DEMs proved to be more accurate than the 2m LiDAR DEM in terms of altimetric coordinates, though the DEM generated from UAV images acquired at 50 m altitude gave the most accurate result when compared with the vertical accuracy obtained from the DEM generated from UAV images acquired at 30 m and 70 m flight heights. These findings are also consistent with the result of the statistical analysis at 95% confidence interval.https://ejournal.undip.ac.id/index.php/geoplanning/article/view/25894unmanned aerial vehiclelidar technologydigital elevation modelterrain modellinglidaruav |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Oluibukun Gbenga Ajayi Mark Palmer |
spellingShingle |
Oluibukun Gbenga Ajayi Mark Palmer Modelling 3D Topography by Comparing Airborne Lidar Data with Unmanned Aerial System (UAS) Photogrammetry Under Multiple Imaging Conditions Geoplanning: Journal of Geomatics and Planning unmanned aerial vehicle lidar technology digital elevation model terrain modelling lidar uav |
author_facet |
Oluibukun Gbenga Ajayi Mark Palmer |
author_sort |
Oluibukun Gbenga Ajayi |
title |
Modelling 3D Topography by Comparing Airborne Lidar Data with Unmanned Aerial System (UAS) Photogrammetry Under Multiple Imaging Conditions |
title_short |
Modelling 3D Topography by Comparing Airborne Lidar Data with Unmanned Aerial System (UAS) Photogrammetry Under Multiple Imaging Conditions |
title_full |
Modelling 3D Topography by Comparing Airborne Lidar Data with Unmanned Aerial System (UAS) Photogrammetry Under Multiple Imaging Conditions |
title_fullStr |
Modelling 3D Topography by Comparing Airborne Lidar Data with Unmanned Aerial System (UAS) Photogrammetry Under Multiple Imaging Conditions |
title_full_unstemmed |
Modelling 3D Topography by Comparing Airborne Lidar Data with Unmanned Aerial System (UAS) Photogrammetry Under Multiple Imaging Conditions |
title_sort |
modelling 3d topography by comparing airborne lidar data with unmanned aerial system (uas) photogrammetry under multiple imaging conditions |
publisher |
Diponegoro University |
series |
Geoplanning: Journal of Geomatics and Planning |
issn |
2355-6544 |
publishDate |
2020-04-01 |
description |
This study presents the effect of image data sources on the topographic modelling of part of the National Trust site located at Weston-Super-Mare, Bristol, United Kingdom, covering an approximate area of 1.82 hectares. The accuracy of the DEM generated from 1m resolution and 2m resolution LiDAR data together with the accuracy of the DEM generated from the UAV images acquired at different altitudes are analysed using the 1 m LiDAR DEM as reference for the accuracy assessment. Using the NSSDA methodology, the horizontal and vertical accuracy of the DEMs generated from each of the four sources were computed while the paired sample t-test was conducted to ascertain the existence of statistically significant difference between the means of the X, Y, and Z coordinates of the check points. The result obtained shows that with a RMSE of -0.0101499 and horizontal accuracy of -0.175674686m, the planimetric coordinates extracted from 2 m LiDAR DEM were more accurate than the planimetric coordinates extracted from the UAV based DEMs while the UAV based DEMs proved to be more accurate than the 2m LiDAR DEM in terms of altimetric coordinates, though the DEM generated from UAV images acquired at 50 m altitude gave the most accurate result when compared with the vertical accuracy obtained from the DEM generated from UAV images acquired at 30 m and 70 m flight heights. These findings are also consistent with the result of the statistical analysis at 95% confidence interval. |
topic |
unmanned aerial vehicle lidar technology digital elevation model terrain modelling lidar uav |
url |
https://ejournal.undip.ac.id/index.php/geoplanning/article/view/25894 |
work_keys_str_mv |
AT oluibukungbengaajayi modelling3dtopographybycomparingairbornelidardatawithunmannedaerialsystemuasphotogrammetryundermultipleimagingconditions AT markpalmer modelling3dtopographybycomparingairbornelidardatawithunmannedaerialsystemuasphotogrammetryundermultipleimagingconditions |
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