Browsing Journal of Surveying Engineering by Issue Date
Now showing items 1-20 of 991
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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 ... -
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 ... -
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) ... -
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 ... -
Expanding TRANS4D’s Scope to Include 3D Crustal Velocity Estimates for a Neighborhood of the Caribbean Plate
(ASCE, 11/1/2021)This paper introduces Version 0.3 of the TRANS4D software, where TRANS4D is short for Transformations in Four Dimensions. TRANS4D enables geospatial professionals and others to transform three-dimensional (3D) positional ... -
Rapid Prediction of Vertical Deflections and Their Statistics for Surveying and Mapping Applications: Three Case Studies
(ASCE, 11/1/2021)The accurate determination of deflections of the vertical is a complex scientific task that can be time-consuming and expensive. On occasion, good approximations are required for surveying and engineering applications. ... -
Network-Aided Reduction of Slope Distances in Small-Scale Geodetic Control Networks
(ASCE, 11/1/2021)Most of the human-made infrastructures (e.g., dams) need very precise geodetic networks and constant monitoring to detect risks of failure and to plan civil engineering maintenance works. The combination of different ... -
Use of GNSS-Derived PWV for Predicting the Path of Typhoon: Case Studies of Soulik and Kongrey in 2018
(ASCE, 11/1/2021)The progress of a typhoon can be investigated by analyzing the significant changes in precipitable water vapor (PWV) in the area of interest. In this study, PWV variations of two typhoons in 2018 were investigated based ... -
Lane Offset Survey for One-Lane Horizontal Curvatures Using Binocular Stereo Vision Measurement System
(ASCE, 11/1/2021)A disproportionate number of serious traffic accidents caused by lane offset occur at horizontal curvatures. Widely used methods for vehicle trajectory measurement, such as the vehicle position system and unmanned aerial ... -
Enhancement of Computational Efficiency for Weighted Total Least Squares
(ASCE, 11/1/2021)Weighted total least-squares (WTLS) adjustment is a rigorous method used for estimating parameters in the errors-in-variables (EIV) model. However, its computational efficiency is limited due to the large number of matrix ... -
Rates of Natural Subsidence along the Texas Coast Derived from GPS and Tide Gauge Measurements (1904–2020)
(ASCE, 11/1/2021)This study investigated the rate of natural subsidence along the Texas coast using multidecadal to century tide gauge (TG) and global positioning system (GPS) data sets. The rates of land subsidence and sea level rise are ... -
Accuracy Assessment of Sea Surface Height Measurement Obtained from Shipborne PPP Positioning
(ASCE, 11/1/2021)Sea surface height (SSH), a measurement widely used in marine science, can be used to compute the marine gravity field while providing underlying information on the ocean current, tide, and geoid. A traditional SSH measurement ... -
Voxel Change: Big Data–Based Change Detection for Aerial Urban LiDAR of Unequal Densities
(ASCE, 11/1/2021)The proposed voxel change (VC) algorithm provides accurate, scalable, and quantifiable change detection for urban aerial Light Detection and Ranging (LiDAR) scans. This VC algorithm uses MapReduce, a big data programming ... -
Indoor Map Boundary Correction Based on Normalized Total Least Squares of Condition Equation
(ASCE, 11/1/2021)Indoor high-precision maps are necessary for many applications, including robot navigation and location-based services. Raw indoor map boundaries are too irregular and coarse to be used in practical applications directly; ... -
Virtual Observation Iteration Solution and A-Optimal Design Method for Ill-Posed Mixed Additive and Multiplicative Random Error Model in Geodetic Measurement
(ASCE, 11/1/2021)The mixed additive and multiplicative random error model is a combination of the additive error random model and multiplicative random error model. Weakness is an attribute of the mixed additive and multiplicative random ... -
Photogrammetric Mapping for Highways: Western U.S.
(American Society of Civil Engineers, 1983)This paper presents a brief history of photogrammetric mapping for highway activities in the Western States. Reasons for emphasis and development of techniques are discussed. Some of the problems encountered in the development ... -
Centimeter‐Level Relative Positioning with GPS
(American Society of Civil Engineers, 1983)Although the Global Positioning System (GPS) was designed primarily for real‐time navigation and positioning applications at the dekameter (10‐m, or 33‐ft) level of accuracy, the GPS has been used to determine the relative ... -
New Positioning Power for the Surveyor
(American Society of Civil Engineers, 1983)A new field positioning capability is now available for engineering surveys using the TRANSIT satellite transmissions and the JMR‐2000 Global Surveyor. Three dimensional position transfers over “one‐hop” distances of 500 ...