Journal of Surveying Engineering: Recent submissions
Now showing items 121-140 of 1001
-
Impact of Height Datum Parameters on Height Reference System Realizations: Case Study in Croatia
(ASCE, 5/1/2020 1)The Croatian Height Reference System for the epoch 1971.5 (HVRS71) is the official height reference system of the Republic of Croatia, newly established after Croatia’s independence. By using the network of the Second High ... -
Numerical Computation of Egg and Double-Egg Curves with Clothoids
(ASCE, 2/1/2020 1)The clothoid, also known as Cornu spiral or Euler spiral, is a curve widely used as a transition curve when designing the layout of railway tracks and roads because of a key feature: its curvature is proportional to its ... -
Improving Data Acquisition Efficiency: Systematic Accuracy Evaluation of GNSS-Assisted Aerial Triangulation in UAS Operations
(ASCE, 2/1/2020 1)The number of unmanned aerial system (UAS) mapping applications that require high-accuracy data sets have grown significantly in recent years. Indirect georeferencing (IG) requires the establishment of multiple, well ... -
Gross Error Detectability and Identifiability Analysis in Track Control Network for High-Speed Railway Based on GEJE
(ASCE, 2/1/2020 1)To ensure that the high-speed train with speeds from 200 to 350 km/h or even faster can run safely and smoothly, the ballastless or ballast track must have high riding comfort. As the precise control reference of railway ... -
Proposed Algorithm of Land Parcel Subdivision
(ASCE, 2020)Subdivision is a very important issue in land surveying and is characterized by the legal change of property boundaries in agreement with the local standards and regulations for maintaining the quality of the zone environment. ... -
Bias Reduction Method for Parameter Inversion of Ill-Posed Surveying Model
(ASCE, 2020)Because of ill-posed problems, inverted parameters of ill-posed models always have large variances. The regularization method is widely used to solve this problem. Based on the mean square error (MSE) criterion, the ... -
DEM Construction Method for Slopes Using Three-Dimensional Point Cloud Data Based on Moving Least Square Theory
(ASCE, 2020)The multitemporal digital elevation model (DEM) of slopes constructed from three-dimensional (3D) point cloud data (PCD), which is obtained by terrestrial laser scanning (TLS), can realize the real-time monitoring and ... -
Comparative Review of Molodensky–Badekas and Burša–Wolf Methods for Coordinate Transformation
(ASCE, 2020)J. Badekas reinterpreted M. S. Molodensky’s three-dimensional similarity transformation as a vector solution using a centroid. The solution has since been (mis)interpreted by some others with inconsistent reference to the ... -
Ambiguity-Resolved Real-Time Precise Point Positioning as a Potential Fill-In Service for Sparse CORS Networks
(ASCE, 2020)Precise point positioning (PPP) employs readily available Global Navigation Satellite System (GNSS) orbit- and clock-correction products to perform point positioning using a single GNSS receiver. Recently, attention has ... -
The ADOP and PDOP: Two Complementary Diagnostics for GNSS Positioning
(ASCE, 2020)Ambiguity dilution of precision (ADOP) and position dilution of precision (PDOP) are two popular scalar-diagnostics used in Global Navigation Satellite System (GNSS) positioning. Where the ADOP is a predictor for carrier-phase ... -
Accuracy of Steel Flange Measurements in Renovation and Construction Work for Offshore Industry
(ASCE, 2020)Geometrical surveys are an important part of the renovation process in the oil and gas and shipbuilding industries. They enable improved safety and decreased costs of such types of processes. The crucial moment of such ... -
Development and Evaluation of Temporary Traffic Control Devices for Unmanned Aerial System Operations
(ASCE, 2020)Unmanned aerial systems (UASs) are an emerging technology being used in many fields, including surveying engineering. When UASs are used for these activities, they may operate in close proximity to active traffic. UASs ... -
Estimating Variance–Covariance Matrix of the Parameters of a Fitted Triaxial Ellipsoid
(ASCE, 2020)Least-squares (LS) techniques have been a frequent choice advocated by a plethora of engineers for modeling problems requiring a unique solution based on sets of redundant observations perturbed by random noise. In this ... -
Heuristic Strategies of Modified Levenberg–Marquardt Algorithm for Fitting Transition Curves
(ASCE, 2020)Horizontal curve identification is important both for road safety management and railway maintenance. Parameters of a transition curve are introduced to perform an orthogonal least-squares fitting. During such a fitting ... -
Algorithm and Assessment of Ambiguity-Fixed PPP with BeiDou Observations and Regional Network Augmentation
(ASCE, 2020)In precise point positioning (PPP) applications, uncalibrated phase delays (UPD) are applied to retrieve the ambiguity integers for achieving precise solutions over a short period. Also, the atmospheric corrections obtained ... -
Evaluation of Compatibility among Network Adjustment Software: CoMeT, LGC, and Trinet+
(ASCE, 2020)A network adjustment program is an essential tool for surveyors. It allows the computation of point coordinates and confidence regions from measurements undertaken in the field. It also helps surveyors in the design of ... -
Automatic Astronomical Survey Method Based on Video Measurement Robot
(ASCE, 2020)Utilizing charge-coupled device (CCD) imaging technology in astronomical surveying and positioning facilitates high-precision measurements without manual observation. This eliminates the influence of the traditional celestial ... -
Accuracy Assessment of DEMs in Different Topographic Complexity Based on an Optimum Number of GCP Formulation and Error Propagation Analysis
(ASCE, 2020)One of the main concerns during digital elevation model (DEM) evaluation is the number of ground control points (GCP). Accordingly, in this paper, a new method is proposed for calculating the appropriate number of GCPs for ... -
Multicriteria Decision Making in Geodetic Network Design
(ASCE, 2020)The article presents an original approach to the design of geodetic networks, taking into account quality criteria. This approach is based on the geodetic network design using the methods of multicriteria decision making ... -
Discussion of “Rigorous Estimation of Local Accuracies Revisited” by Tomás Soler and Jen-Yu Han
(American Society of Civil Engineers, 2019)