Journal of Surveying Engineering: Recent submissions
Now showing items 101-120 of 1001
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Effect of Stochastic Model Errors on Significance Test for Velocities in Analysis of GPS Position Time Series
(ASCE, 2/1/2021)This study investigates the effect of stochastic model errors on the significance test for velocities in the analysis of a global positioning system (GPS) position time series. This effect is studied by considering the ... -
Improving Dam Deformation Analysis Using Least-Squares Variance Component Estimation and Tikhonov Regularization
(ASCE, 2/1/2021)Several least-squares adjustment techniques were tested for dam deformation analysis. Deformation monitoring had only been studied horizontally. Simulated observations were first performed to compare the three methods of ... -
Assessment of Dynamic Properties and Scope of Implementing a New Track Transition Curve
(ASCE, 2/1/2021)This paper discusses the possibility of replacing the commonly used clothoid transition curve on a railroad route with a new transition curve adapted to railway operational requirements. The new transition curve is similar ... -
New Computer Simulation Method for First-Order Design of Geodetic Network: Aiming for Low Cost
(ASCE, 2/1/2021)Optimization of a geodetic network is a process in which a specific stage (or stages) is designed in such a way that the obtained result meets the assumed (optimum) design requirements. The goal of this article is to present ... -
Dense Point Cloud Quality Factor as Proxy for Accuracy Assessment of Image-Based 3D Reconstruction
(ASCE, 2/1/2021)Photogrammetry using structure from motion (SfM) and multiview stereopsis (MVS) techniques can recover three-dimensional (3D) structure from a set of overlapping, unoriented, and uncalibrated images captured by nonmetric ... -
Accuracy Estimation of Earthquake Source Geometry Parameters by the Sterling Interpolation Method in Nonlinear Inversion
(ASCE, 2/1/2021)Estimating the accuracy of source geometry parameters is helpful for understanding error propagation in a nonlinear inversion. To date, no studies have estimated the nonlinear inversion accuracy of source geometry parameters. ... -
Approach to Minimizing the Influence of Changeable Observational Environment on Long-Distance Sea-Crossing Trigonometric Leveling
(ASCE, 11/1/2020 )Instabilities in observed environments at sea, such as the sudden appearance of fog, varying temperature or pressure, changes in wind speed and direction, and differential gravitational and magnetic fields in each observed ... -
Resolution and Precision of Fast Long-Range Terrestrial Photogrammetric Surveying Aimed at Detecting Slope Changes
(ASCE, 11/1/2020 )Structure-from-motion (SfM) is currently used for geological-geomorphological purposes under the condition that the modeling is based either on several ground control points (GCPs) well distributed in the scene or on direct ... -
Jackknife Method for Variance Components Estimation of Partial EIV Model
(ASCE, 11/1/2020 )To further improve the quality of estimated values based on variance component estimation of the partial errors-in-variables (EIV) model, the jackknife resampling method is introduced in this paper. Focusing on the bias ... -
Data Snooping for the Equality Constrained Nonlinear Gauss–Helmert Model Using Sensitivity Analysis
(ASCE, 11/1/2020 )To develop a universal-outliers processing algorithm under the conditions with equality constraints, the equality-constrained nonlinear Gauss–Helmert (GH) model, which contains the equality-constrained Gauss–Markov (GM) ... -
Geodetic Network Design in Tunnel Surveys
(ASCE, 11/1/2020 )The design of surveying networks inside tunnels is of crucial importance because an optimal design enables the network to fulfill its required quality parameters, for instance, precision and reliability. The precision of ... -
Can Long-Range Single-Baseline RTK Provide Service in Shanghai Comparable to Network RTK?
(ASCE, 11/1/2020 )Traditionally, GPS real-time kinematic (RTK) technique can provide precise positioning for short baselines, and network-based RTK (NRTK) is much more effective than the single-baseline RTK (SRTK) stemming from its capability ... -
Precise Astronomical Orientation Using Multiple Stars at Their Culmination and Analysis of Different Regression Models
(ASCE, 8/1/2020 1)Precise determination of the astronomical azimuth using the local hour angle (LHA) of Polaris is only applicable in northern middle latitudes. Therefore, to achieve fast and precise astronomical orientation in any part of ... -
Iterative Process of Msplit(q) Estimation
(ASCE, 8/1/2020 1)Msplit(q) estimation allows us to estimate competitive parameters, namely different versions of the parameter vector within the split functional model. In the univariate model, such parameters can be regarded as location ... -
Assessment of Gridded Gravity Anomalies for Precise Geoid Modeling in Turkey
(ASCE, 8/1/2020 1)High-accuracy and homogeneously distributed dense terrestrial gravity observations are essential data for detailed analysis of the Earth gravity field as well as for precise modeling of the geoid, which is a natural datum ... -
Performance of Network-Based GNSS Positioning Services in Poland: A Case Study
(ASCE, 8/1/2020 1)Continuously operating reference station (CORS) networks, as one of the fundamental segments of the precise global navigation satellite systems (GNSSs) positioning techniques, have been undergoing rapid development and ... -
Experimental Validation of Track Inspection Trolley Using a Rigorous Self-Checking Procedure
(ASCE, 8/1/2020 1)International standards establish strict criteria for the measurement of railway track geometric parameters by track inspection trolleys. In the case of the rails’ internal geometry, the values of some parameters (such as ... -
Establishment of Chart Datum and Vertical Datum Transformation for Hydrography in the Chinese Great Wall Bay, Antarctic Peninsula
(ASCE, 5/1/2020 1)The Great Wall bay has become an important investigation area due to the establishment of the Chinese Antarctic Great Wall scientific research station. Establishing a seamless chart datum and its transformation model with ... -
Understanding the Demographics of Surveying Students in Pennsylvania and Making Plans to Increase the Awareness of the Surveying Profession
(ASCE, 5/1/2020 1)Technological advancements of the past decades have considerably changed the surveying profession and education required to become a surveyor. Many states require a combination of education (sometimes at least 4-year) and ... -
Nonexistence of Maximum Likelihood Estimation of Variance Components in Some Stochastic Models
(ASCE, 5/1/2020 1)Although maximum likelihood has been widely used to estimate unknown parameters in stochastic models of random errors, we show that the method cannot be used to estimate variance components for some stochastic models of ...