Influence of AGL flight and off-nadir images on UAV-SfM accuracy in complex morphology terrains
In the field of geosciences and engineering, situations arise where special attention have to be paid to the planning of the UAVphotogrammetric project, that is, terrain with complex geometry and steep slopes. The use of off-nadir imagery and flights at a fixed height above ground level (AGL) are p...
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| Format: | info:eu-repo/semantics/article |
| Language: | English |
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Francis and Taylor
2024
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| Online Access: | http://hdl.handle.net/10835/15013 |
| _version_ | 1789406722832465920 |
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| author | Agüera Vega, Francisco |
| author_facet | Agüera Vega, Francisco |
| author_sort | Agüera Vega, Francisco |
| collection | DSpace |
| description | In the field of geosciences and engineering, situations arise where special attention have to be paid to the planning of the UAVphotogrammetric project, that is, terrain with complex geometry and steep slopes. The use of off-nadir imagery and flights at a
fixed height above ground level (AGL) are postulated as possible factors to be considered to achieve high accuracies. The objective
of this study is to evaluate the influence of image angle, frontal and side overlaps, and type of flight (above mean sea level
(AMSL) or AGL), on the accuracy of the dense 3D point cloudyielded by UAV-SfM. The results obtained showed that imagery
with an angle between 20 and 35 in two perpendicular flight line directions, 90/90, 90/70 or 70/70 overlap and AGL flight is
the optimal combination for best accuracy and high precision. With nadir imagery, the combination of factors that gives the
most accuracy results are AGL flights with a 90/70 overlap. |
| format | info:eu-repo/semantics/article |
| id | oai:repositorio.ual.es:10835-15013 |
| institution | Universidad de Cuenca |
| language | English |
| publishDate | 2024 |
| publisher | Francis and Taylor |
| record_format | dspace |
| spelling | oai:repositorio.ual.es:10835-150132024-01-09T12:44:42Z Influence of AGL flight and off-nadir images on UAV-SfM accuracy in complex morphology terrains Agüera Vega, Francisco Unmanned aerial vehicle oblique images above ground level above mean sea level UAV-SfM photogrammetry complex terrain morphology In the field of geosciences and engineering, situations arise where special attention have to be paid to the planning of the UAVphotogrammetric project, that is, terrain with complex geometry and steep slopes. The use of off-nadir imagery and flights at a fixed height above ground level (AGL) are postulated as possible factors to be considered to achieve high accuracies. The objective of this study is to evaluate the influence of image angle, frontal and side overlaps, and type of flight (above mean sea level (AMSL) or AGL), on the accuracy of the dense 3D point cloudyielded by UAV-SfM. The results obtained showed that imagery with an angle between 20 and 35 in two perpendicular flight line directions, 90/90, 90/70 or 70/70 overlap and AGL flight is the optimal combination for best accuracy and high precision. With nadir imagery, the combination of factors that gives the most accuracy results are AGL flights with a 90/70 overlap. 2024-01-09T12:44:42Z 2024-01-09T12:44:42Z 2022-05-11 info:eu-repo/semantics/article 10106049 http://hdl.handle.net/10835/15013 en https://doi.org/10.1080/10106049.2022.2074147 info:eu-repo/semantics/openAccess Francis and Taylor |
| spellingShingle | Unmanned aerial vehicle oblique images above ground level above mean sea level UAV-SfM photogrammetry complex terrain morphology Agüera Vega, Francisco Influence of AGL flight and off-nadir images on UAV-SfM accuracy in complex morphology terrains |
| title | Influence of AGL flight and off-nadir images on UAV-SfM accuracy in complex morphology terrains |
| title_full | Influence of AGL flight and off-nadir images on UAV-SfM accuracy in complex morphology terrains |
| title_fullStr | Influence of AGL flight and off-nadir images on UAV-SfM accuracy in complex morphology terrains |
| title_full_unstemmed | Influence of AGL flight and off-nadir images on UAV-SfM accuracy in complex morphology terrains |
| title_short | Influence of AGL flight and off-nadir images on UAV-SfM accuracy in complex morphology terrains |
| title_sort | influence of agl flight and off-nadir images on uav-sfm accuracy in complex morphology terrains |
| topic | Unmanned aerial vehicle oblique images above ground level above mean sea level UAV-SfM photogrammetry complex terrain morphology |
| url | http://hdl.handle.net/10835/15013 |
| work_keys_str_mv | AT agueravegafrancisco influenceofaglflightandoffnadirimagesonuavsfmaccuracyincomplexmorphologyterrains |