Uav Photgrammetric Workflows: A Best Practice Guideline

Federman, Alex D.; Quintero, Mario Santana; Kretz, S.; Gregg, J.; Lengies, M.; Ouimet, C.; Laliberté, Jeremy

doi:10.5194/isprs-archives-xlii-2-w5-237-2017

Cited by 21 publications

(12 citation statements)

References 17 publications

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“…(Nex and Remondino, 2014) instead, provided a more detailed review in the Cultural Heritage domain and possible applications, especially with regard to mapping and 3d survey. Many scientific publications aim to define standards and guidelines for drone-based surveying (Federman et al, 2017) or for specific operations such as facade surveys (Palanirajan et al, 2019). In many other cases, however, there is work done with the relative validation of data, confirming the effectiveness of drones in cultural heritage surveys.…”

Section: Related Workmentioning

confidence: 99%

Ultra Light Uav Systems for the Metrical Documentation of Cultural Heritage: Applications for Architecture and Archaeology

Adami

Fregonese

Gallo

et al. 2019

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. The Italian legislation on Remote Pilot Aircraft Systems (SAPR: Sistema Areomobile a Pilotaggio Remoto), as in 2012, regulates the use of drones in controlled and uncontrolled airspace. In 2016, the regulation introduced simplified procedures for the use of ultra-light drones. These instruments are particularly widespread in the field of Cultural Heritage survey. In fact, according to the Italian regulations currently in force it is possible to pilot a drone of less than 300 grams without the need of a flight license and without a specific training course and medical examination and it is not required a special permit to fly in populates areas (although without flying over groups of people). Another possible explanation is the limited cost of these aircrafts and their easy availability on the market, both on the shelves of all electronic shops and in online stores.Following the boom of drones under 300 g, and considering the new European regulations also pay particular attention to a similar segment of Unmanned Aerial Vehicle (UAV) (in the future for aircraft under 250 g), it is important to evaluate the results that can be obtained through these small instruments and above all to evaluate which are the fields of application compatible with the technical limitations imposed by the need to lighten the components onboard (think in particular of the sensors of digital cameras).The purpose of the study is linked to the documentation of Cultural Heritage, in particular, we want to investigate the quality and metric reliability of photogrammetric surveys carried out through ultra-light drone images. Some application of UAV photogrammetry by ultra-light drones are showed in this paper and they deal with archaeological and architectural survey.

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Section: Related Workmentioning

confidence: 99%

Ultra Light Uav Systems for the Metrical Documentation of Cultural Heritage: Applications for Architecture and Archaeology

Adami

Fregonese

Gallo

et al. 2019

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…guaranteed good results during the image matching stage. These overlaps have been planned considering the recommendation given in [35] and [61]. Finally, the winter 2017 flight was designed using the same overlaps used for the summer flight, thus allowing us to reduce computational efforts.…”

Section: Uas Flightsmentioning

confidence: 99%

Centimetric Accuracy in Snow Depth Using Unmanned Aerial System Photogrammetry and a MultiStation

et al. 2018

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Performing two independent surveys in 2016 and 2017 over a flat sample plot (6700 m 2 ), we compare snow-depth measurements from Unmanned-Aerial-System (UAS) photogrammetry and from a new high-resolution laser-scanning device (MultiStation) with manual probing, the standard technique used by operational services around the world. While previous comparisons already used laser scanners, we tested for the first time a MultiStation, which has a different measurement principle and is thus capable of millimetric accuracy. Both remote-sensing techniques measured point clouds with centimetric resolution, while we manually collected a relatively dense amount of manual data (135 pt in 2016 and 115 pt in 2017). UAS photogrammetry and the MultiStation showed repeatable, centimetric agreement in measuring the spatial distribution of seasonal, dense snowpack under optimal illumination and topographic conditions (maximum RMSE of 0.036 m between point clouds on snow). A large fraction of this difference could be due to simultaneous snowmelt, as the RMSE between UAS photogrammetry and the MultiStation on bare soil is equal to 0.02 m. The RMSE between UAS data and manual probing is in the order of 0.20-0.30 m, but decreases to 0.06-0.17 m when areas of potential outliers like vegetation or river beds are excluded. Compact and portable remote-sensing devices like UASs or a MultiStation can thus be successfully deployed during operational manual snow courses to capture spatial snapshots of snow-depth distribution with a repeatable, vertical centimetric accuracy.

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“…In agreement with Federman et al [26], the images were first manually inspected and checked to ensure they were not blurry and would be useful in the creation of the model. Because the camera supplied with the Anafi has a large field of view, the images showed a large value of overlap.…”

Section: Image Acquisition and Image Processing Of The Masonry Bridgementioning

confidence: 87%

UAV Photogrammetry and 3D Modelling of Complex Architecture for Maintenance Purposes: the Case Study of the Masonry Bridge on the Sele River, Italy

Pepe

Costantino

2020

Period. Polytech. Civil Eng.

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The aim of this paper is to identify a suitable methodology to realize, in an easy and quick way, 3D models of complex structures. To achieve this aim, the first step is to build the 3D model of the scene under investigation using photogrammetric modelling. This task was carried out by the use of algorithms based on Structure from Motion (SfM) - Multi View Stereo (MVS) approaches and using camera-generated images supplied in the UAS (Unmanned Aerial system). Once built the 3D point cloud of the structure under investigation, the geometry of each element was reconstructed with 3D profile reconstruction using Rhinoceros software and a few plug-ins developed in this software. Indeed, this paper shows, through a case study of a masonry bridge of special architectural and historic value built in the middle of 1800s and located in the south of Italy, the potential of the method developed in order to manage a maintenance or restoration project.

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Uav Photgrammetric Workflows: A Best Practice Guideline

Cited by 21 publications

References 17 publications

Ultra Light Uav Systems for the Metrical Documentation of Cultural Heritage: Applications for Architecture and Archaeology

Ultra Light Uav Systems for the Metrical Documentation of Cultural Heritage: Applications for Architecture and Archaeology

Centimetric Accuracy in Snow Depth Using Unmanned Aerial System Photogrammetry and a MultiStation

UAV Photogrammetry and 3D Modelling of Complex Architecture for Maintenance Purposes: the Case Study of the Masonry Bridge on the Sele River, Italy

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