Simplified Building Models Extraction From Ultra-Light Uav Imagery

Küng, Olivier; Strecha, Christoph; Fua, Pascal; Gurdan, Daniel; Achtelik, Mickael; Doth, Klaus-Michael; Stumpf, Jan

doi:10.5194/isprsarchives-xxxviii-1-c22-217-2011

Cited by 15 publications

(10 citation statements)

References 16 publications

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“…For georeferencing, five ground control points were measured with a Leica GPS1200 GNSS receiver operating at RTK (real time kinematic) processing mode with accuracies of about 2 to 3 cm. The photogrammetry software Agisoft Photoscan was used to process the images into an orthophoto mosaic and DSM using a structure from motion approach (Snavely et al, 2007;Küng et al, 2011). Resulting products possess a resolution of a few millimetres.…”

Section: Geomorphic Mapping Terrain Survey and Analysismentioning

confidence: 99%

Solifluction meets vegetation: the role of biogeomorphic feedbacks for turf‐banked solifluction lobe development

Eichel

Draebing

Klingbeil

et al. 2017

Earth Surf Processes Landf

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Vegetation is an important factor influencing solifluction processes, while at the same time, solifluction processes and landforms influence species composition, fine‐scale distribution and corresponding ecosystem functioning. However, how feedbacks between plants and solifluction processes influence the development of turf‐banked solifluction lobes (TBLs) and their geomorphic and vegetation patterns is still poorly understood. We addressed this knowledge gap in a detailed biogeomorphic investigation in the Turtmann glacier foreland (Switzerland). Methods employed include geomorphic and vegetation mapping, terrain assessment with unmanned aerial vehicle (UAV) and temperature logging. Results were subsequently integrated with knowledge from previous geomorphic and ecologic studies into a conceptual model. Our results show that geomorphic and vegetation patterns at TBLs are closely linked through the lobe elements tread, risers and ridge. A conceptual four‐stage biogeomorphic model of TBL development with ecosystem engineering by the dwarf shrub Dryas octopetala as the dominant process can explain these interlinked patterns. Based on this model, we demonstrate that TBLs are biogeomorphic structures and follow a cyclic development, during which the role of their components for engineer and non‐engineer species changes. Our study presents the first biogeomorphic model of TBL development and highlights the applicability and necessity of biogeomorphic approaches and research in periglacial environments. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Geomorphic Mapping Terrain Survey and Analysismentioning

confidence: 99%

Solifluction meets vegetation: the role of biogeomorphic feedbacks for turf‐banked solifluction lobe development

Eichel

Draebing

Klingbeil

et al. 2017

Earth Surf Processes Landf

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“…Images were recorded at a pitch angle of 10º off-nadir to increase point visibility along sub-vertical surfaces and increase precision of final models within the high-relief topography (Nesbit and Hugenholtz, 2019). Images were processed using Pix4Dmapper v4.3 following a similar workflow described by previous authors (Küng et al, 2012;Nesbit et al, 2018). Following initial processing, the model was divided into four quadrants and processed into a dense point cloud and 3D textured mesh.…”

Section: Data Collection and Dom Processingmentioning

confidence: 99%

Visualization and Sharing of 3D Digital Outcrop Models to Promote Open Science

Nesbit¹,

Boulding²,

Hugenholtz³

et al. 2020

GSAT

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High-resolution 3D data sets, such as digital outcrop models (DOMs), are increasingly being used by geoscientists to supplement field observations and enable multiscale and repeatable analysis that was previously difficult, if not impossible, to achieve using conventional methods. Despite an increasing archive of DOMs driven by technological advances, the ability to share and visualize these data sets remains a challenge due to large file sizes and the need for specialized software. Together, these issues limit the open exchange of data sets and interpretations. To promote greater data accessibility for a broad audience, we implement three modern platforms for disseminating models and interpretations within an open science framework: Sketchfab, potree, and Unity. Web-based platforms, such as Sketchfab and potree, render interactive 3D models within standard web browsers with limited functionality, whereas game engines, such as Unity, enable development of fully customizable 3D visualizations compatible with multiple operating systems. We review the capabilities of each platform using a DOM of an extensive outcrop exposure of Late Cretaceous fluvial stratigraphy generated from uninhabited aerial vehicle images. Each visualization platform provides end-users with digital access and intuitive controls to interact with large DOM data sets, without the need for specialized software and hardware. We demonstrate a range of features and interface customizability that can be created and suggest potential use cases to share interpretations, reinforce student learning, and enhance scientific communication through unique and accessible visualization experiences.

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“…The pursuit of higher ground pixel resolution in the centimeter range leads to bring the carrier closer to the target, utilizing smaller electrically powered carriers. One or more circular/linear flight paths over a distinctive object are often shown, followed by computer-based modeling of this object (Küng et al, 2011;Li & Li, 2011;Wenzel et al, 2013). Flight times of 15 to 30 minutes are common until the need for touch down.…”

Section: D Aerial Camera System Macs-tumblecammentioning

confidence: 99%

The Salsa Project – High-End Aerial 3d Camera

Rüther-Kindel

Brauchle

2013

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

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ABSTRACT:The ATISS measurement drone, developed at the University of Applied Sciences Wildau, is an electrical powered motor glider with a maximum take-off weight of 25 kg including a payload capacity of 10 kg. Two 2.5 kW engines enable ultra short take-off procedures and the motor glider design results in a 1 h endurance. The concept of ATISS is based on the idea to strictly separate between aircraft and payload functions, which makes ATISS a very flexible research platform for miscellaneous payloads. ATISS is equipped with an autopilot for autonomous flight patterns but under permanent pilot control from the ground. On the basis of ATISS the project SALSA was undertaken. The aim was to integrate a system for digital terrain modelling. Instead of a laser scanner a new design concept was chosen based on two synchronized high resolution digital cameras, one in a fixed nadir orientation and the other in a oblique orientation. Thus from every object on the ground images from different view angles are taken. This new measurement camera system MACS-TumbleCam was developed at the German Aerospace Center DLR Berlin-Adlershof especially for the ATISS payload concept. Special advantage in comparison to laser scanning is the fact, that instead of a cloud of points a surface including texture is generated and a high-end inertial orientation system can be omitted. The first test flights show a ground resolution of 2 cm and height resolution of 3 cm, which underline the extraordinary capabilities of ATISS and the MACS measurement camera system. * Corresponding author.The project SALSA described in this paper was supported by the federal state Brandenburg and the European Union by the EFRE-WiTet program. More information about the "Europäischer Fond für regionale Entwicklung" EFRE can be found under www.efre.brandenburg.de.

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Simplified Building Models Extraction From Ultra-Light Uav Imagery

Cited by 15 publications

References 16 publications

Solifluction meets vegetation: the role of biogeomorphic feedbacks for turf‐banked solifluction lobe development

Solifluction meets vegetation: the role of biogeomorphic feedbacks for turf‐banked solifluction lobe development

Visualization and Sharing of 3D Digital Outcrop Models to Promote Open Science

The Salsa Project – High-End Aerial 3d Camera

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