Accuracy of Point Layout with Polar Coordinates

Baykal, Orhan; Tarı, Ergin; Coskun, Merve; Erden, Turan

doi:10.1061/(asce)0733-9453(2005)131:3(87)

Cited by 17 publications

(23 citation statements)

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“…Taking into account all the relevant components of errors, during the planning of the stakeout process it is important to satisfy the criteria in Eq. (2) [6]:…”

Section: Accuracy Of Point Stakeout By Polar Methodsmentioning

confidence: 99%

“…It is particularly important that there are no nearby reflective surfaces which would cause multipath signals; a feat difficult to achieve in practice [24]. For these reasons the polar method of staking continues to be the most practiced procedure [6].…”

Section: The Horizontal Setting Outmentioning

confidence: 99%

“…On the basis of the coordinate errors of the control geodetic network, and errors in stakeout element measurements, it is possible to predict the accuracy that will be achieved during the stakeout of the structures' individual points. It is important to emphasize that the achieved accuracy of the stakeout should be smaller than the required one [6].…”

Section: Introductionmentioning

confidence: 99%

“…In [6] the influence of the geodetic network design, the measurements and selection of the appropriate instruments for stakeout accuracy were analyzed. It was shown that in most cases the required accuracy could be obtained by using measurements with only one face of the instrument.…”

Section: Introductionmentioning

confidence: 99%

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A Simulation Analysis on the Expected Horizontal Accuracy of a Bridge Stakeout

et al. 2018

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Abstract:The positioning of an object in space, i.e. "transfer" of data from the design to the field is an extremely significant and important geodetic operation. This activity requires great and well-deserved attention, especially when it comes to sensitive structures such as bridges. The position of a stakeout point in the field depends on a variety of different influences, all determining the actual accuracy of the stakeout. The aim of this Article is to investigate the dependency of horizontal setting out of the bridge axis accuracy (abutments and piers of the bridge) from the distance between the station and the setout point, the datum of the geodetic control network, and the precision of angular and linear measurements. The authors use an innovative visualization technique for the assessment of spatial variation of the horizontal stakeout by error ellipses.

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“…Taking into account all the relevant components of errors, during the planning of the stakeout process it is important to satisfy the criteria in Eq. (2) [6]:…”

Section: Accuracy Of Point Stakeout By Polar Methodsmentioning

confidence: 99%

Section: The Horizontal Setting Outmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Simulation Analysis on the Expected Horizontal Accuracy of a Bridge Stakeout

et al. 2018

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“…Our main sources of errors were centering the prism pole at the GCP locations and the uncertainties in angle and distance measurements observed with the total station. Following the procedure described by Baykal et al [60], with a 1.0 mm centering error for the prism pole [61] and the published accuracy of the Leica TS02 total station [62], the estimated relative positional uncertainty of the GCPs is approximately 1.5-1.7 mm. Each plot was surveyed separately in its own local coordinate system.…”

Section: Image Acquisitionmentioning

confidence: 99%

Fine-Resolution Repeat Topographic Surveying of Dryland Landscapes Using UAS-Based Structure-from-Motion Photogrammetry: Assessing Accuracy and Precision against Traditional Ground-Based Erosion Measurements

et al. 2017

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Structure-from-motion (SfM) photogrammetry from unmanned aerial system (UAS) imagery is an emerging tool for repeat topographic surveying of dryland erosion. These methods are particularly appealing due to the ability to cover large landscapes compared to field methods and at reduced costs and finer spatial resolution compared to airborne laser scanning. Accuracy and precision of high-resolution digital terrain models (DTMs) derived from UAS imagery have been explored in many studies, typically by comparing image coordinates to surveyed check points or LiDAR datasets. In addition to traditional check points, this study compared 5 cm resolution DTMs derived from fixed-wing UAS imagery with a traditional ground-based method of measuring soil surface change called erosion bridges. We assessed accuracy by comparing the elevation values between DTMs and erosion bridges along thirty topographic transects each 6.1 m long. Comparisons occurred at two points in time (June 2014, February 2015 which enabled us to assess vertical accuracy with 3314 data points and vertical precision (i.e., repeatability) with 1657 data points. We found strong vertical agreement (accuracy) between the methods (RMSE 2.9 and 3.2 cm in June 2014 and February 2015, respectively) and high vertical precision for the DTMs (RMSE 2.8 cm). Our results from comparing SfM-generated DTMs to check points, and strong agreement with erosion bridge measurements suggests repeat UAS imagery and SfM processing could replace erosion bridges for a more synoptic landscape assessment of shifting soil surfaces for some studies. However, while collecting the UAS imagery and generating the SfM DTMs for this study was faster than collecting erosion bridge measurements, technical challenges related to the need for ground control networks and image processing requirements must be addressed before this technique could be applied effectively to large landscapes.

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Experience of Using Total Station and GNSS Technologies for Tall Building Construction Monitoring

Silva

Ibañez

Poleszuk

2017

Facing the Challenges in Structural Engineering

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Abstract. In prevalent engineering practice, geodetic measurement techniques are commonly applied for structural monitoring. For a long time, triangulation, trilateration and levelling techniques have been trusted for the determination of structural deformation and point displacement, with excellent outcomes. With the advent of robotic total stations, the three-dimensional topographic measurement method has been proposed as an efficient and rapid measurement option for the determination of 3D coordinates. In addition, the GNSS (Global Navigation Satellite System) technology improvements, mainly in the RTK (Real-Time Kinematic) measurement mode, opened a new perspective for monitoring, which has also shown consistent results. However, there are some situations where the use of total station or GNSS technology individually is not enough to perform the monitoring. The solution may then be the combination of both technologies. In this paper, we present the details of two proposed measurement methods and the results of a testing campaign carried out to monitor the construction of "La Costanera Tower", in Santiago, Chile, using a total station combined with GNSS receivers. These methods are based on the use of GNSS antennas and total station installed on the under-construction building floor. Having this scenario, two measurement procedures were applied. The first one was based on using a total station coupled with a GNSS receiver, for determining the position of the monitoring point and a GNSS antenna coupled with prism reflector, for the orientation of the total station. The second procedure was based on using a total station and two GNSS antennas coupled with prism reflectors. With this equipment, directions and distances were measured, to determine the position and orientation of the total station, by means of a Free Station positioning computation. The testing results have been compared with traditional measurement techniques. The results showed that the proposed methods could be a suitable solution for monitoring tall building construction.

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Accuracy of Point Layout with Polar Coordinates

Cited by 17 publications

References 0 publications

A Simulation Analysis on the Expected Horizontal Accuracy of a Bridge Stakeout

A Simulation Analysis on the Expected Horizontal Accuracy of a Bridge Stakeout

Fine-Resolution Repeat Topographic Surveying of Dryland Landscapes Using UAS-Based Structure-from-Motion Photogrammetry: Assessing Accuracy and Precision against Traditional Ground-Based Erosion Measurements

Experience of Using Total Station and GNSS Technologies for Tall Building Construction Monitoring

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