Measurement uncertainty in network RTK GNSS-based positioning of a terrestrial laser scanner

Mårtensson, Stig-Göran; Reshetyuk, Yuriy; Jivall, Lotti

doi:10.1515/jag-2011-0013

Cited by 7 publications

(5 citation statements)

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“…However, this accuracy already allows the integration of further remote sensing data. The relative accuracy of the RTK-GPS allowed the initial registration of the point clouds, which is according to Mårtensson et al (2012) sufficient. The connection to local surveying networks was enabled by transformation of similar points.…”

Section: Discussionmentioning

confidence: 99%

Geoarchaeological site documentation and analysis of 3D data derived by terrestrial laser scanning

Hoffmeister

Zellmann

Kindermann

et al. 2014

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:Terrestrial laser scanning was conducted to document and analyse sites of geoarchaeological interest in Jordan, Egypt and Spain. In those cases, the terrestrial laser scanner LMS-Z420i from Riegl was used in combination with an accurate RTK-GPS for georeferencing of the point clouds. Additionally, local surveying networks were integrated by established transformations and used for indirect registration purposes. All data were integrated in a workflow that involves different software and according results. The derived data were used for the documentation of the sites by accurate plans and cross-sections. Furthermore, the 3D data were analysed for geoarchaeological research problems, such as volumetric determinations, the ceiling thickness of a cave and lighting simulations based on path tracing. The method was reliable in harsh environmental conditions, but the weight of the instrument, the measuring time and the minimum measurement distance were a drawback. However, generally an accurate documentation of the sites was possible. Overall, the integration in a 3D GIS is easily possible by the accurate georeference of the derived data. In addition, local survey results are also implemented by the established transformations. Enhanced analyses based on the derived 3D data shows promising results.

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Section: Discussionmentioning

confidence: 99%

Geoarchaeological site documentation and analysis of 3D data derived by terrestrial laser scanning

Hoffmeister

Zellmann

Kindermann

et al. 2014

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…"Pseudo-direct georeferencing" qualifies an alternative referencing method, for the most part based on the methods proposed by Reshetyuk (2009) and Mårtensson, Reshetyuk, and Jivall (2012). These methods are themselves largely based on a georeferencing approach analogous to procedure used for total station survey Lichti & Gordon, 2004;Scaioni, 2005).…”

Section: Pseudo-direct Georeferencingmentioning

confidence: 99%

Adequacy of pseudo-direct georeferencing of terrestrial laser scanning data for coastal landscape surveying against indirect georeferencing

Jaud

Letortu

Augereau

et al. 2017

European Journal of Remote Sensing

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International audienceThe georeferencing process is crucial to the accuracy of Terrestrial Laser Scanner data, in particular in the context of diachronic studies relying on multi-temporal surveys. The use of Ground Control Points in the georeferencing process can however be complex when confronted with the practical constraints of coastal surveying.A simple and quick alternative method called “pseudo-direct georeferencing” is proposed in the present paper. This method involves internal inclinometers to measure roll and pitch angles and a centimetric GPS to measure the position of the TLS center and the position of one backsight target. When assessing the transformational uncertainty by using a set of independent ground validation points for both classical indirect and proposed pseudo-direct methods, we respectively obtain Root Mean Square errors of 4.4 cm for the indirect method and 3.8 cm for the pseudo-direct metho

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“…The observation procedure was according to findings in Mårtensson et al. () where the recommendation is 1 Hz observations during an interval of 60 s in order to achieve a planimetric uncertainty of less than 10 mm and a height uncertainty of less than 16 mm.…”

Section: Measurementsmentioning

confidence: 99%

“…A priori standard uncertainties of the GCP coordinates were set to 10 mm in planimetry and 16 mm in height in accordance with Mårtensson et al. ().…”

Section: Data Processingmentioning

confidence: 99%

Generation of Highly Accurate Digital Elevation Models with Unmanned Aerial Vehicles

Reshetyuk

Mårtensson

2016

The Photogrammetric Record

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In order to investigate the possibilities for the generation of digital elevation models with a height uncertainty of 20 mm or less using unmanned aerial vehicles, a survey with a fixed-wing aircraft was carried out over a gravel quarry in G€ avle, Sweden. At flying heights of about 80 and 160 m, the resulting imagery had ground sample distances of 24 and 50 mm, respectively. The data was processed in two different software suitescomputer-vision-based PhotoScan and photogrammetric RapidStation/RapidTerrain. The results show that PhotoScan was more effective in flat terrain, with height uncertainties of 10 and 17 mm compared with 30 to 40 mm for RapidTerrain, whereas the latter had a clear advantage over undulating terrain.

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Measurement uncertainty in network RTK GNSS-based positioning of a terrestrial laser scanner

Cited by 7 publications

References 0 publications

Geoarchaeological site documentation and analysis of 3D data derived by terrestrial laser scanning

Geoarchaeological site documentation and analysis of 3D data derived by terrestrial laser scanning

Adequacy of pseudo-direct georeferencing of terrestrial laser scanning data for coastal landscape surveying against indirect georeferencing

Generation of Highly Accurate Digital Elevation Models with Unmanned Aerial Vehicles

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