The application of GPS precise point positioning technology in aerial triangulation

Yuan, Xia; Fu, Jianhong; Sun, Hui; Toth, Charles K.

doi:10.1016/j.isprsjprs.2009.03.006

Cited by 49 publications

(21 citation statements)

References 10 publications

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“…In the case of the internal traverse, the minimum RMSE applied for an occupation time of 30 minutes was 0.15 m (Table 6). These results are similar to the study of Yuan, Fu, Sun, & Toth (2009), who indicated that the tolerance for checkpoint coordinates must be less than 0,25 m for planimetry and less than 0.30 m for elevation in plane surveying at a scale of 1:500. …”

Section: Accuracy Of Height Differences (Vertical Distances)supporting

confidence: 89%

Precision and accuracy of the static GNSS system for surveying networks used in Civil Engineering

Correa-Muños¹,

Cerón-Calderón²

2018

Ing. Inv.

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Precisión y exactitud del método GNSS en modo estático para redes topográficas utilizadas en ingeniería civilNixon A. Correa-Muños 1 , and Liliana A. Cerón-Calderón 2 ABSTRACTA field check was implemented for calibrating surveying equipment. It was geo-referenced with a Total Station Theodolite and by implementing procedures concerning repeatability and reproducibility. We carried out GNSS (Global Navigation Satellite System) static positioning with double frequency equipment, sensitizing occupation times, day times, uncorrected coordinates subjected to a differential correction procedure and type of coordinates obtained. This facilitated an evaluation of precision and accuracy for the GNSS positioning with the static method, which gave a global RMSE (root mean square error) of 1 cm for conditions with no multipath effect and 4 cm for field calibration points close to buildings. Additionally, optimal results for occupation times of 30 minutes were found, and the need to use planar Cartesian coordinates to ensure compatibility with the surveys using electronic measurement of distances, which allows the use of the static GNSS positioning for geo-referencing precise surveying networks, and can be used in different applications in Civil Engineering.

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Section: Accuracy Of Height Differences (Vertical Distances)supporting

confidence: 89%

Precision and accuracy of the static GNSS system for surveying networks used in Civil Engineering

Correa-Muños¹,

Cerón-Calderón²

2018

Ing. Inv.

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“…Aerial triangulation is the basic method for analyzing aerial images in order to calculate the three-dimensional coordinates of object points and the exterior orientation of the images [31]. This process allows the absolute orientation of the entire photogrammetric block to be calculated.…”

Section: Methodsmentioning

confidence: 99%

An Analysis of the Influence of Flight Parameters in the Generation of Unmanned Aerial Vehicle (UAV) Orthomosaicks to Survey Archaeological Areas

Mesas‐Carrascosa

García

Larriva

et al. 2016

Sensors

100

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This article describes the configuration and technical specifications of a multi-rotor unmanned aerial vehicle (UAV) using a red–green–blue (RGB) sensor for the acquisition of images needed for the production of orthomosaics to be used in archaeological applications. Several flight missions were programmed as follows: flight altitudes at 30, 40, 50, 60, 70 and 80 m above ground level; two forward and side overlap settings (80%–50% and 70%–40%); and the use, or lack thereof, of ground control points. These settings were chosen to analyze their influence on the spatial quality of orthomosaicked images processed by Inpho UASMaster (Trimble, CA, USA). Changes in illumination over the study area, its impact on flight duration, and how it relates to these settings is also considered. The combined effect of these parameters on spatial quality is presented as well, defining a ratio between ground sample distance of UAV images and expected root mean square of a UAV orthomosaick. The results indicate that a balance between all the proposed parameters is useful for optimizing mission planning and image processing, altitude above ground level (AGL) being main parameter because of its influence on root mean square error (RMSE).

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“…As a basic photogrammetric method, AT is used for calculating the three-dimensional (3D) coordinates of objects by analyzing overlapping aerial images captured from varied perspectives [45]. AT traditionally requires the manual identification of thousands of control points linking images to one another and to a reference dataset to enable least squares estimation of the optimal triangulation model.…”

Section: Introductionmentioning

confidence: 99%

Characterizing Pavement Surface Distress Conditions with Hyper-Spatial Resolution Natural Color Aerial Photography

et al. 2016

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Roadway pavement surface distress information is critical for effective pavement asset management, and subsequently, transportation management agencies at all levels (i.e., federal, state, and local) dedicate a large amount of time and money to routinely evaluate pavement surface distress conditions as the core of their asset management programs. However, currently adopted ground-based evaluation methods for pavement surface conditions have many disadvantages, like being time-consuming and expensive. Aircraft-based evaluation methods, although getting more attention, have not been used for any operational evaluation programs yet because the acquired images lack the spatial resolution to resolve finer scale pavement surface distresses. Hyper-spatial resolution natural color aerial photography (HSR-AP) provides a potential method for collecting pavement surface distress information that can supplement or substitute for currently adopted evaluation methods. Using roadway pavement sections located in the State of New Mexico as an example, this research explored the utility of aerial triangulation (AT) technique and HSR-AP acquired from a low-altitude and low-cost small-unmanned aircraft system (S-UAS), in this case a tethered helium weather balloon, to permit characterization of detailed pavement surface distress conditions. The Wilcoxon Signed Rank test, Mann-Whitney U test, and visual comparison were used to compare detailed pavement surface distress rates measured from HSR-AP derived products (orthophotos and digital surface models generated from AT) with reference distress rates manually collected on the ground using standard protocols. The results reveal that S-UAS based hyper-spatial resolution imaging and AT techniques can provide detailed and reliable primary observations suitable for characterizing detailed pavement surface distress conditions comparable to the ground-based manual measurement, which lays the foundation for the future application of HSR-AP for automated detection and assessment of detailed pavement surface distress conditions.

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The application of GPS precise point positioning technology in aerial triangulation

Cited by 49 publications

References 10 publications

Precision and accuracy of the static GNSS system for surveying networks used in Civil Engineering

Precision and accuracy of the static GNSS system for surveying networks used in Civil Engineering

An Analysis of the Influence of Flight Parameters in the Generation of Unmanned Aerial Vehicle (UAV) Orthomosaicks to Survey Archaeological Areas

Characterizing Pavement Surface Distress Conditions with Hyper-Spatial Resolution Natural Color Aerial Photography

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