Journal of Surveying Engineering: Recent submissions
Now showing items 501-520 of 1001
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Using a Global Positioning System to Measure Tidal Currents in Absecon Inlet, Atlantic City, N.J.
(American Society of Civil Engineers, 2007)A Leica System 5000 dual frequency global positioning system receiver System 500 rover operating from a fixed base station was mounted in a drogue made from a -
Assessment of Low-Cost GPS Receiver Accuracy and Precision in Forest Environments
(American Society of Civil Engineers, 2007)Selecting the appropriate receiver is an issue when a major portion of global positioning system (GPS) data collection is below forest canopies. This study compares four low-cost GPS receivers, in order to determine the ... -
GNSS Differential Positioning by Robust Estimation
(American Society of Civil Engineers, 2008)Robust estimation yields more accurate results than least-squares estimation in the presence of undesirable errors. It has been recently applied to the process of GNSS differential positioning in the standard fashion of ... -
Theoretical and Numerical Aspects of the Geodetic Method for Determining the Atmospheric Refraction Coefficient Using Simultaneous and Mutual Zenith Observations
(American Society of Civil Engineers, 2008)The estimation of the atmospheric refraction coefficient by conducting simultaneous and mutual zenith observations is a well-known geodetic procedure. The respective mathematical model is based on certain assumptions ... -
Extracting Streetlight Poles from Orthophotos: Methodology and Case Study in Ontario, Canada
(American Society of Civil Engineers, 2007)A method for extracting streetlight poles from orthophotos is presented. The main challenge of the research undertaken was to recognize streetlight poles which are narrow, vertical objects that have very limited width in ... -
Bessel’s Graphical Solution of Three-Point Problem in Plane-Table Surveying—Limitation and Alternative Solutions
(American Society of Civil Engineers, 2007)The orientation of a plane table at a new station is carried out with the help of three well-defined visible points available on the ground along with their corresponding plot on the plan using Bessel’s graphical solution. ... -
Analysis of Some Positional Accuracy Assessment Methodologies
(American Society of Civil Engineers, 2008)This work presents an analysis of some standard methodologies for positional accuracy assessment of geographic data bases, taking into account aspects like the statistical formulation, the size of the control sample, the ... -
Acceptance Curves for the Positional Control of Geographic Databases
(American Society of Civil Engineers, 2008)A simulation process is implemented in order to generate synthetic populations of positional-planimetric errors and later, by a bootstrap process, a family of acceptance curves (nomogram) has been derived. These curves ... -
Regularized Solution to Fast GPS Ambiguity Resolution
(American Society of Civil Engineers, 2007)In rapid global positioning systems (GPS) positioning one of the key problems is to quickly determine the ambiguities of GPS carrier phase observables. Since carrier phase observations are generally collected only for a ... -
Semianalytical Equations for Transforming Errors into a Local Geodetic Frame
(American Society of Civil Engineers, 2007)With the development of space-based systems, the results of various applications are generally provided in an earth-centered and earth-fixed global coordinate frame. However, many times it is necessary to transform those ... -
New Algorithm of GPS Rapid Positioning Based on Double- k -Type Ridge Estimation
(American Society of Civil Engineers, 2007)In this paper, a new algorithm is employed in global positioning system (GPS) rapid positioning using several-epoch single-frequency phase data. First, we define the double- -
New Line Accuracy Assessment Methodology Using Nonlinear Least-Squares Estimation
(American Society of Civil Engineers, 2008)This paper presents a novel line accuracy assessment technique by measuring the offsets of a typical measured line from the true reference line. These measurements are assumed to follow a Gaussian distribution. Buffers of ... -
Efficient Method for Estimating Globally Optimal Simple Vertical Curves
(American Society of Civil Engineers, 2008)Different methods for estimating simple vertical curves that optimally fit observed profile data have been developed. In 1999, the author developed a linear programming (LP) method for estimating simple vertical curves ... -
Quasi-Accurate Detection of Outliers for Correlated Observations
(American Society of Civil Engineers, 2007)Experience with surveying practices has shown that correlated observations are very often encountered, especially in preprocessed observations. Hence, it is not only of theoretical interest, but also of practical interest, ... -
Land-Vehicle INS/GPS Accurate Positioning during GPS Signal Blockage Periods
(American Society of Civil Engineers, 2007)In the last decade, the demand for accurate land-vehicle navigation (LVN) in several applications has grown rapidly. In this context, the idea of integrating multisensor navigation systems was implemented. For LVN, the ... -
Influence of the Cutoff Angle and the Bearing in High-Precision GPS Vector Determination
(American Society of Civil Engineers, 2007)Accurate global positioning system (GPS) vector determination is now one of the major applications in modern geodesy. Most of the errors are modeled either to smooth atmospheric effects or to remove biases, such as clock ... -
Efficiency and Reliability of Ambiguity Resolution in Network-Based Real-Time Kinematic GPS
(American Society of Civil Engineers, 2007)Fast and reliable ambiguity resolution (AR) is particularly challenging in long-range real-time kinematic (RTK) global positioning system (GPS), since the atmospheric errors decorrelate with the increasing base-rover ... -
Constraining Network Adjustments to OPUS-RS Coordinate Observations
(American Society of Civil Engineers, 2007)OPUS rapid static (OPUS-RS) was introduced to the public in August 2005 as an operational prototype. Allowing centimeter accuracy with 10–15-min observation sessions, OPUS-RS holds the promise of dramatically lessening the ... -
Geodetic Determination of Radio Telescope Antenna Reference Point and Rotation Axis Parameters
(American Society of Civil Engineers, 2007)Large parabola dish antennae are in use for station-to-satellite communications, satellite tracking for precise orbit determination, very long baseline interferometry , and others. In this paper a procedure for the precise ... -
Modeling Terrestrial Laser Scanner Data for Precise Structural Deformation Measurement
(American Society of Civil Engineers, 2007)A modeling strategy has been developed that permits coarse-precision terrestrial laser scanner observations to be used to accurately measure vertical deflections of deforming beams. The model is developed from fundamental ...