Validating UAS-Based Photogrammetry with Traditional Topographic Methods for Surveying Dune Ecosystems in the Spanish Mediterranean Coast

In the past few years, unmanned aerial systems (UAS) have achieved great popularity for civil uses. One of the present main uses of these devices is low-cost aerial photogrammetry, being especially useful in coastal environments. In this work, a high-resolution 3D model of a beach section in Guardam...

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Bibliographic Details
Published in:Journal of marine science and engineering 2019-09, Vol.7 (9), p.297
Main Authors: Bañón, Luis, Pagán, José Ignacio, López, Isabel, Banon, Carlos, Aragonés, Luis
Format: Article
Language:English
Subjects:
3D point cloud
Accuracy
Aerial photography
Algorithms
Beaches
coastal environment
Coastal environments
Coastal management
Coastal zone
Coastal zone management
Coasts
DSM
dune systems
Dunes
Ecosystems
Global navigation satellite system
GNSS
Kinematics
Navigation
Navigational satellites
Photogrammetry
Polls & surveys
Root-mean-square errors
SfM
survey
Surveying
Surveys
Three dimensional models
Topography
Tourism
UAS
Unmanned aerial vehicles
validation
Vegetation
Workflow
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Summary:In the past few years, unmanned aerial systems (UAS) have achieved great popularity for civil uses. One of the present main uses of these devices is low-cost aerial photogrammetry, being especially useful in coastal environments. In this work, a high-resolution 3D model of a beach section in Guardamar del Segura (Spain) has been produced by employing a low maximum takeoff mass (MTOM) UAS, in combination with the use of structure-from-motion (SfM) techniques. An unprecedented extensive global navigation satellite system (GNSS) survey was simultaneously carried out to statistically validate the model by employing 1238 control points for that purpose. The results show good accuracy, obtaining a vertical root mean square error (RMSE) mean value of 0.121 m and a high point density, close to 30 pt/m2, with similar or even higher quality than most coastal surveys performed with classical techniques. UAS technology permits the acquisition of topographic data with low time-consuming surveys at a high temporal frequency. Coastal managers can implement this methodology into their workflow to study the evolution of complex, highly anthropized dune-beach systems such as the one presented in this study, obtaining more accurate surveys at lower costs.
ISSN:2077-1312
2077-1312
DOI:10.3390/jmse7090297