Journal of Surveying Engineering: Recent submissions
Now showing items 81-100 of 1001
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Effect of Point Configurations on Parameter Estimation Analysis of Circles
(ASCE, 8/1/2021)The Fisher Information Matrix (FIM) determinant and the precision of the circle parameters are derived for generic configurations with n data points. The conditions for maximizing the FIM determinant are examined, and ... -
Integrated InSAR and GNSS Monitoring Subsystem for an Arch Dam and Reservoir Banks
(ASCE, 8/1/2021)Interferometric synthetic aperture radar (InSAR) is a cost-effective method for displacement measurement at dams and reservoir banks, and is especially relevant for structures without embedded equipment or rarely monitored. ... -
Geodetic Network Geometry versus Reliability Measures in Examples of the Trilateration Network
(ASCE, 8/1/2021)The article describes selected case studies of the trilateration network design. The analyzed case studies may be of interest to the geodetic community but may also be potentially interesting for educational purposes. The ... -
Recovering the Vestiges of the Old Meridian Arc of Paris in the Valencian Community of Spain
(ASCE, 8/1/2021)This paper describes research carried out both to obtain the location and identify possible vestiges of the old geodetic benchmarks used by the expedition formed by French geodesists Arago and Biot and Spanish geodesists ... -
Evaluation of GNSS-IR for Retrieving Soil Moisture and Vegetation Growth Characteristics in Wheat Farmland
(ASCE, 8/1/2021)Global navigation satellite system interferometric reflectometry (GNSS-IR) is a new remote sensing method that has shown great potential for estimating soil moisture variation and vegetation growth in the vicinity of GNSS ... -
Image-Assisted Total Station Camera Mounting Error Correction Model and Analysis
(ASCE, 8/1/2021)Image-assisted total stations (IATSs) have extensive application prospects in astronomic surveys, deformation monitoring, precision engineering surveying, and topographic mapping. During image processing of data, the angle ... -
Reliability Criteria in Sequential Least-Squares Adjustment
(ASCE, 8/1/2021)This paper examines the reliability criteria in sequential least-squares adjustment. Sequential least-squares techniques are widely implemented to effectively use adjustment processes. We use the reliability concept to ... -
SChina20: A Stable Geodetic Reference Frame for Ground Movement and Structural Deformation Monitoring in South China
(ASCE, 8/1/2021)We have established a stable regional geodetic reference frame, designated as SChina20, using approximately 10-year observations (2010–2019) at 40 Global Navigation Satellite System (GNSS) sites in South China. The regional ... -
Impact of Multiconstellation on Relative Static GNSS Positioning
(ASCE, 5/1/2021)Until a few years ago, a precise survey was only possible using global positioning system (GPS) and Global’naja Navigacionnaja Sputnikovaja Sistema (GLONASS) constellations, but the result was not guaranteed under conditions ... -
Real-Time Probabilistic Structural Evaluation of Bridges Using Dynamic Displacements Extracted via GPS Technology
(ASCE, 5/1/2021)Global Positioning System (GPS) technology is reported in the literature as a reasonable alternative for the structural health monitoring (SHM) of bridges. However, more validations of GPS technology must be performed to ... -
Geoengineering Education for Management of Geospatial Data in University Context
(ASCE, 5/1/2021)In our society, geospatial data are used for multiple purposes, and their use has grown exponentially in recent decades, especially with the emergence of COVID-19. In this sense, universities play a key role in the geospatial ... -
The First Realization of BeiDou Coordinate System and Its Assessment
(ASCE, 5/1/2021)The BeiDou Navigation Satellite System (BDS) has used the BeiDou Coordinate System (BDCS) as its geodetic reference system since December 2017. After a brief description of the background, definitions of the origin, scale, ... -
AFRC-Trop: New Real-Time Zenith Tropospheric Delay Model over Africa
(ASCE, 5/1/2021)This study aims to develop a new real-time zenith tropospheric delay (ZTD) model over Africa, namely the AFRC-Trop model. In order to estimate the ZTD, global positioning system (GPS) observations from 14 reference stations ... -
Comparison of sUAS Photogrammetry and TLS for Detecting Changes in Soil Surface Elevations Following Deep Tillage
(ASCE, 5/1/2021)Agricultural and forestry operations significantly affect land morphology. Monitoring topographical and morphological changes is important in agriculture, forestry geomorphology, and soil sciences for improving land ... -
Investigating Performance of High-Rate GNSS-PPP and PPP-AR for Structural Health Monitoring: Dynamic Tests on Shake Table
(ASCE, 2/1/2021)This paper investigates the usability of Global Navigation Satellite System (GNSS) Precise Point Positioning (PPP) methods, traditional PPP with a float-ambiguity solution and with ambiguity resolution (PPP-AR), in structural ... -
Optimal Independent Baseline Searching for Global GNSS Networks
(ASCE, 2/1/2021)An n-station continuously operated global navigation satellite system (GNSS) network contains n-1 independent baselines. Baseline structure is critical to positioning accuracy, and the final result is dependent on the ... -
New First-Order Approximate Precision Estimation Method for Parameters in an Errors-in-Variables Model
(ASCE, 2/1/2021)To evaluate the posterior precision of weighted total least-squares (WTLS) estimates in an errors-in-variables model, first-order approximate precision estimation (FOA) methods are usually used. However, FOAs might not be ... -
Three-Dimensional Network Adjustment of Laser Tracker Measurements for Large-Scale Metrology Applications
(ASCE, 2/1/2021)The adjustment of laser tracker network measurements for large-scale metrology applications has unique considerations not commonly encountered in the network adjustment approaches generally used in either standard metrology ... -
Automated Metadata Cataloging for Mobile Terrestrial Laser Scanning Data Management: Case Study
(ASCE, 2/1/2021)This case study examines two essential aspects of mobile terrestrial laser scanning (MTLS). First, it provides results of an investigation into key data management issues experienced by a fairly large producer/consumer of ... -
Direct and Indirect Estimation of the Variance–Covariance Matrix of the Parameters of a Fitted Ellipse and a Triaxial Ellipsoid
(ASCE, 2/1/2021)This work deals with the estimation of the variance–covariance matrix of the parameters of a fitted ellipse and an ellipsoid by a direct and an indirect procedure. In the direct approach, the Cartesian equation of an ...