Journal of Surveying Engineering: Recent submissions
Now showing items 181-200 of 1023
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Reliable Dynamic Monitoring of Bridges with Integrated GPS and BeiDou
(American Society of Civil Engineers, 2018)In recent years, global positioning system (GPS) has been widely used for the measurement of deflections of bridges. However, due to multipath and satellite signal obstructions caused by towers, cables, and passing vehicles, ... -
Recursive Least Squares with Additive Parameters: Application to Precise Point Positioning
(American Society of Civil Engineers, 2018)There are two different but equivalent forms to solve a least squares (LS) adjustment problem, namely batch LS (BLS) and recursive LS (RLS). The batch form is usually not an appropriate approach when measurements are ... -
Circular Curve-Fitting Method for Field Surveying Data with Correlated Noise
(American Society of Civil Engineers, 2018)The horizontal alignment geometric parameter is an important basis for road management, safety analysis, and railway maintenance. Therefore, the identification of horizontal curve features is of great importance. Least ... -
Testing Methods for Adjustment Models with Constraints
(American Society of Civil Engineers, 2018)The method of least squares is widely used to fit data to a mathematical model, and the model is generally formulated as a Gauss-Markov model. Constraints on the parameters lead to a constrained adjustment of the observations. ... -
Efficient Approximation for a Fully Populated Variance-Covariance Matrix in RTK Positioning
(American Society of Civil Engineers, 2018)Global navigation satellite system (GNSS) observations have been shown to be physically correlated. Disregarding the physical correlations in a variance-covariance matrix (VCM) will lead to adverse impacts on GNSS applications. ... -
Automatic Horizontal Curve Identification and Measurement Using Mobile Mapping System
(American Society of Civil Engineers, 2018)This study presents an automatic method for horizontal curve identification and measurement using a mobile mapping system (MMS) with consideration of the impacts of vehicle wandering on the measurement. The hierarchical ... -
Reliability of Models in Kinematic Deformation Analysis
(American Society of Civil Engineers, 2018)A kinematic deformation analysis (KDA) model is mostly preferred to estimate the displacement, velocity, and acceleration parameters in deformation analysis. Different models, such as linear and quadratic, are used in KDA. ... -
Partial Total-Least-Squares Adjustment of Condition Equations with Application to a Rectangular Building Adjustment in a GIS
(American Society of Civil Engineers, 2018)This paper presents a partial total-least-squares adjustment method for condition equations (PTLSC) in which the observation vector and coefficient matrix contain linearly correlated errors. In the proposed method, the ... -
Active versus Passive Rotations
(American Society of Civil Engineers, 2018)Active and passive rotations are used in many applied scientific fields, such as engineering, geodesy, and geophysics, just to name a few. However, a source of confusion could arise when both types of rotations are performed ... -
Weighted Total Least Squares with Singular Covariance Matrices Subject to Weighted and Hard Constraints
(American Society of Civil Engineers, 2017)Weighted total least squares (WTLS) has been widely used as a standard method to optimally adjust an errors-in-variables (EIV) model containing random errors both in the observation vector and in the coefficient matrix. ... -
Identification of Horizontal Circular Arc from Spatial Data Sources
(American Society of Civil Engineers, 2016)Curves represent the most interesting element to be analyzed when evaluating the operational and safety effects of road geometrics. Despite the existence of several static and dynamic survey techniques, the correct ... -
Millimeter-Accuracy Structural Deformation Monitoring Using Stand-Alone GPS: Case Study in Beijing, China
(American Society of Civil Engineers, 2018)Structural monitoring and engineering surveys that use the Global Positioning System (GPS) have traditionally performed using a so-called carrier-phase double-difference method in data processing. The method requires at ... -
Arctic High-Resolution Elevation Models: Accuracy in Sloped and Vegetated Terrain
(American Society of Civil Engineers, 2018)New high-resolution elevation models for Alaska have recently been released; they were created using interferometric synthetic aperture radar (IFSAR) and automated matching of high-resolution optical satellite stereo imagery ... -
Scaled Unscented Transformation of Nonlinear Error Propagation: Accuracy, Sensitivity, and Applications
(American Society of Civil Engineers, 2018)The scaled unscented transformation (SUT) with scaled symmetric sampling strategy is introduced into Geomatics and expanded. Unlike the Taylor series expansion, this method treats nonlinear error propagation without a ... -
Morphological Analysis for Architectural Applications: Comparison between Laser Scanning and Structure-from-Motion Photogrammetry
(American Society of Civil Engineers, 2016)Terrestrial laser scanning (TLS) and structure-from-motion photogrammetry (SfM) can both provide dense and accurate point clouds. Therefore, they can be used to perform a morphological analysis of the façades of a masonry ... -
A Closed-Form Solution for Coarse Registration of Point Clouds Using Linear Features
(American Society of Civil Engineers, 2016)This paper presents a closed-form procedure for the coarse registration of three-dimensional (3D) point clouds using automatically extracted linear features, which have been manually matched. Corresponding linear features ... -
Experimental Study on Low-Cost Satellite-Based Geodetic Monitoring over Short Baselines
(American Society of Civil Engineers, 2016)The use of geodetic techniques, in particular of the global positioning system (GPS), or other global navigation satellite systems (GNSS), for monitoring different kinds of deformations is a common practice. This is typically ... -
Gross-Error Detection in GNSS Networks Using Spanning Trees
(American Society of Civil Engineers, 2016)Many methods and techniques have been developed to detect gross errors in geodetic measurements, but none seems to have prevailed. Statistical tests and robust methods are the most common approaches for detecting outliers ... -
Measurement of Bridge Dynamic Responses Using Network-Based Real-Time Kinematic GNSS Technique
(American Society of Civil Engineers, 2016)The network-based real-time kinematic (NRTK) global navigation satellite system (GNSS) technique was proposed for the first time to monitor the dynamic response of bridges. It could receive corrections from an established ... -
Comparison of Various GPS Processing Solutions toward an Efficient Validation of the Hellenic Vertical Network: The ELEVATION Project
(American Society of Civil Engineers, 2016)A research project called ELEVATION (Evaluation of the HelLEnic Vertical Network in the FrAme of the European SysTems and Control Networks InterconnectiON—Application in the Areas of Attica and Thessaloniki) for the ...