Inventory of natural processes with nautical charts, real-time kinematic global navigation satellite systems (RTK-GNSS), and unmanned aerial vehicle (UAV), Trindade Island, Brazil
Abstract The volcanic Trindade Island is a remote Brazilian offshore territory in the South Atlantic, located ca. 1.140 kilometers east of the southeast coast of Brazil. The island’s permanent exposure to geological hazards requires assessment. However, the lack of erosion and landslides temporal da...
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ftunivfreestate:oai:figshare.com:article/21755626 2023-05-15T18:21:12+02:00 Inventory of natural processes with nautical charts, real-time kinematic global navigation satellite systems (RTK-GNSS), and unmanned aerial vehicle (UAV), Trindade Island, Brazil Fernanda Avelar Santos (14282242) Maria Cristina de Souza (5996375) Lázaro Valentin Zuquette (14282245) Rodolfo José Angulo (5996378) Maria Luiza Correa da Camara Rosa (6138302) Adriana Ahrendt Talamini (14282248) Carolina Almeida Figueiredo (14282251) 2022-12-01T07:31:42Z https://doi.org/10.6084/m9.figshare.21755626.v1 unknown https://figshare.com/articles/dataset/Inventory_of_natural_processes_with_nautical_charts_real-time_kinematic_global_navigation_satellite_systems_RTK-GNSS_and_unmanned_aerial_vehicle_UAV_Trindade_Island_Brazil/21755626 doi:10.6084/m9.figshare.21755626.v1 CC BY 4.0 CC-BY Geology geotechnology geohazard assessment digital terrain model volcanic landscape South Atlantic Ocean Dataset 2022 ftunivfreestate https://doi.org/10.6084/m9.figshare.21755626.v1 2022-12-23T00:28:04Z Abstract The volcanic Trindade Island is a remote Brazilian offshore territory in the South Atlantic, located ca. 1.140 kilometers east of the southeast coast of Brazil. The island’s permanent exposure to geological hazards requires assessment. However, the lack of erosion and landslides temporal data impedes predictive geohazard analyses. Therefore, we compiled pre-existing data from nautical charts and surveyed the surface terrain on Trindade Island to generate Digital Terrain Models (DTMs) and comparative accuracy analyses. The DTM based on pre-existing data shows the lowest accuracy (root mean square error - RMSE: 12.3 m) yet is adequate for regional studies. In contrast, the DTM developed from real-time kinematic global navigation satellite systems (RTK-GNSS) has the highest vertical accuracy (RMSE: 0.48 m), but spatial variability of ground elements was underestimated and limited to meter-sized (and larger) elements. The DTM obtained using the unmanned aerial vehicle (UAV) with ground control points (GCP), on the other hand, presented lower accuracy (RMSE: 2.37 m) than the RTK-GNSS model but still allowed observation of centimetric (and larger) ground features. For geohazard assessment on Trindade Island, models that allow fine-scale studies are needed. A UAV with GCP provides such standards and proved to be the most viable option in remote and complex sites as well. Hence, this study, the first to allow multi-temporal analysis of geohazard assessment on Trindade Island, offers a viable solution for similar analyses in other remote locations. Dataset South Atlantic Ocean KovsieScholar Repository (University of the Free State - UFS UV) |
institution |
Open Polar |
collection |
KovsieScholar Repository (University of the Free State - UFS UV) |
op_collection_id |
ftunivfreestate |
language |
unknown |
topic |
Geology geotechnology geohazard assessment digital terrain model volcanic landscape South Atlantic Ocean |
spellingShingle |
Geology geotechnology geohazard assessment digital terrain model volcanic landscape South Atlantic Ocean Fernanda Avelar Santos (14282242) Maria Cristina de Souza (5996375) Lázaro Valentin Zuquette (14282245) Rodolfo José Angulo (5996378) Maria Luiza Correa da Camara Rosa (6138302) Adriana Ahrendt Talamini (14282248) Carolina Almeida Figueiredo (14282251) Inventory of natural processes with nautical charts, real-time kinematic global navigation satellite systems (RTK-GNSS), and unmanned aerial vehicle (UAV), Trindade Island, Brazil |
topic_facet |
Geology geotechnology geohazard assessment digital terrain model volcanic landscape South Atlantic Ocean |
description |
Abstract The volcanic Trindade Island is a remote Brazilian offshore territory in the South Atlantic, located ca. 1.140 kilometers east of the southeast coast of Brazil. The island’s permanent exposure to geological hazards requires assessment. However, the lack of erosion and landslides temporal data impedes predictive geohazard analyses. Therefore, we compiled pre-existing data from nautical charts and surveyed the surface terrain on Trindade Island to generate Digital Terrain Models (DTMs) and comparative accuracy analyses. The DTM based on pre-existing data shows the lowest accuracy (root mean square error - RMSE: 12.3 m) yet is adequate for regional studies. In contrast, the DTM developed from real-time kinematic global navigation satellite systems (RTK-GNSS) has the highest vertical accuracy (RMSE: 0.48 m), but spatial variability of ground elements was underestimated and limited to meter-sized (and larger) elements. The DTM obtained using the unmanned aerial vehicle (UAV) with ground control points (GCP), on the other hand, presented lower accuracy (RMSE: 2.37 m) than the RTK-GNSS model but still allowed observation of centimetric (and larger) ground features. For geohazard assessment on Trindade Island, models that allow fine-scale studies are needed. A UAV with GCP provides such standards and proved to be the most viable option in remote and complex sites as well. Hence, this study, the first to allow multi-temporal analysis of geohazard assessment on Trindade Island, offers a viable solution for similar analyses in other remote locations. |
format |
Dataset |
author |
Fernanda Avelar Santos (14282242) Maria Cristina de Souza (5996375) Lázaro Valentin Zuquette (14282245) Rodolfo José Angulo (5996378) Maria Luiza Correa da Camara Rosa (6138302) Adriana Ahrendt Talamini (14282248) Carolina Almeida Figueiredo (14282251) |
author_facet |
Fernanda Avelar Santos (14282242) Maria Cristina de Souza (5996375) Lázaro Valentin Zuquette (14282245) Rodolfo José Angulo (5996378) Maria Luiza Correa da Camara Rosa (6138302) Adriana Ahrendt Talamini (14282248) Carolina Almeida Figueiredo (14282251) |
author_sort |
Fernanda Avelar Santos (14282242) |
title |
Inventory of natural processes with nautical charts, real-time kinematic global navigation satellite systems (RTK-GNSS), and unmanned aerial vehicle (UAV), Trindade Island, Brazil |
title_short |
Inventory of natural processes with nautical charts, real-time kinematic global navigation satellite systems (RTK-GNSS), and unmanned aerial vehicle (UAV), Trindade Island, Brazil |
title_full |
Inventory of natural processes with nautical charts, real-time kinematic global navigation satellite systems (RTK-GNSS), and unmanned aerial vehicle (UAV), Trindade Island, Brazil |
title_fullStr |
Inventory of natural processes with nautical charts, real-time kinematic global navigation satellite systems (RTK-GNSS), and unmanned aerial vehicle (UAV), Trindade Island, Brazil |
title_full_unstemmed |
Inventory of natural processes with nautical charts, real-time kinematic global navigation satellite systems (RTK-GNSS), and unmanned aerial vehicle (UAV), Trindade Island, Brazil |
title_sort |
inventory of natural processes with nautical charts, real-time kinematic global navigation satellite systems (rtk-gnss), and unmanned aerial vehicle (uav), trindade island, brazil |
publishDate |
2022 |
url |
https://doi.org/10.6084/m9.figshare.21755626.v1 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_relation |
https://figshare.com/articles/dataset/Inventory_of_natural_processes_with_nautical_charts_real-time_kinematic_global_navigation_satellite_systems_RTK-GNSS_and_unmanned_aerial_vehicle_UAV_Trindade_Island_Brazil/21755626 doi:10.6084/m9.figshare.21755626.v1 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.21755626.v1 |
_version_ |
1766200341059076096 |