Journal of Surveying Engineering: Recent submissions
Now showing items 521-540 of 1001
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Critical Limitation in Use of τ Test for Gross Error Detection
(American Society of Civil Engineers, 2007)In the computation of a geodetic network, it is well known that the least-squares adjustment may not be the ideal solution when gross errors appear. In general there are two fundamental approaches to determining gross ... -
Application of a Back-Propagation Artificial Neural Network to Regional Grid-Based Geoid Model Generation Using GPS and Leveling Data
(American Society of Civil Engineers, 2007)The height difference between the ellipsoidal height -
Two Radar Interferometric Approaches to Monitor Slow and Fast Land Deformation
(American Society of Civil Engineers, 2007)Differential interferometric synthetic aperture radar (DInSAR) is a deformation measurement technique that couples two interesting characteristics. First, being based on remotely sensed data it offers operational advantages, ... -
SLAC Vertical Comparator for the Calibration of Digital Levels
(American Society of Civil Engineers, 2007)Digital levels replaced spirit levels in most fields of precise height measurements because of the automation of the height readings. Three manufacturers offer digital levels with a single reading resolution of -
GPS-Network Analysis with BLIMPBE: An Alternative to Least-Squares Adjustment for Better Bias Control
(American Society of Civil Engineers, 2007)Geodetic networks, when derived solely from observed GPS baseline vectors, have an inherent datum deficiency of dimension three due to the respective unknown translation parameters. Thus, estimated coordinates from a ... -
Global Optimization Solution of Robust Estimation
(American Society of Civil Engineers, 2007)Robust estimation has proved to be a valuable approach to adjust a surveying network when there are systematic or gross errors in the observations or systematic errors in the functional model. In the present paper we propose ... -
Approximate Extraction of Spiralled Horizontal Curves from Satellite Imagery
(American Society of Civil Engineers, 2007)Generating road databases from high-resolution satellite imagery is advantageous over traditional methods because of its simplicity and efficiency. Previous research has addressed the extraction of nonspiralled horizontal ... -
Use of Satellite Imagery for Establishing Road Horizontal Alignments
(American Society of Civil Engineers, 2007)Generating fast and inexpensive digital road maps and databases from high-resolution satellite imagery is becoming possible for various applications. This paper presents a new method for establishing road horizontal alignment ... -
Development of a New Generation Imaging Total Station System
(American Society of Civil Engineers, 2007)Total stations were developed about -
Structural Monitoring of Cable-Stayed Bridge: Analysis of GPS versus Modeled Deflections
(American Society of Civil Engineers, 2007)In this study global positioning system (GPS) technology is used to monitor the structural movement of a cable-stayed bridge over the River Tamar in northern Tasmania, Australia. Observed displacements are compared with ... -
Comparisons of GPS-Derived Orthometric Heights Using Local Geometric Geoid Models1
(American Society of Civil Engineers, 2007)The purpose of the research was to compare measuring orthometric heights using differential leveling, static global positioning observations, and real-time kinematic (RTK) Global Positioning System (GPS) observations in ... -
Review of Interpreting Land Records, by Donald A. Wilson
(American Society of Civil Engineers, 2006) -
Precise Height Determination Using Leap-Frog Trigonometric Leveling
(American Society of Civil Engineers, 2006)Precise leveling has been used for the determination of accurate heights for many years. The application of this technique is difficult, time consuming, and expensive, especially in rough terrain. These difficulties have ... -
Review of Geodesy for Geomatics and GIS Professionals, by James A. Elithrop Jr. and Dennis D. Findorff
(American Society of Civil Engineers, 2006) -
Stepwise Parameter Estimations in a Time-Variant Similarity Transformation
(American Society of Civil Engineers, 2006)A classic seven-parameter similarity transformation is typically applied in reference frame transformations. For modern day global applications with a higher accuracy requirement, this model is extended to accommodate ... -
Evaluation of a GPS-Based Approach for Rapid and Precise Determination of Geodetic/Astronomical Azimuth
(American Society of Civil Engineers, 2006)The rapid and precise determination of the azimuth information, purely based on the satellite positioning technology of global positioning system (GPS), is tested and evaluated by this paper. The main consideration of using ... -
Overparameterized Least-Squares Adjustment with Linear Models for Geodetic and Surveying Applications
(American Society of Civil Engineers, 2006)Least-squares (LS) estimation is a standard tool for the optimal processing of geodetic and surveying observations. In many applications, additional nuisance parameters are frequently included within the LS adjustment ... -
Improving Long Baseline (100–300 km) Differential GPS Positioning Applying Ionospheric Corrections Derived from Multiple Reference Stations
(American Society of Civil Engineers, 2007)The aim of this study is to develop a method to mitigate the ionospheric delay bias in long baseline differential global positioning system (GPS). The ionospheric delay is the main source of error when single frequency GPS ... -
Statistics of Range of a Set of Normally Distributed Numbers
(American Society of Civil Engineers, 2006)We consider a set of numbers independently drawn from a normal distribution. We investigate the statistical properties of the maximum, minimum, and range of this set. We find that the range is closely related to the standard ... -
Design and Installation of Deep Benchmarks in Expansive Soil
(American Society of Civil Engineers, 2006)Benchmarks are typically regarded as stable points to provide references for elevations. In areas with expansive soils, special techniques are necessary to provide benchmarks that are free from ground movements. To prevent ...