Journal of Surveying Engineering: Recent submissions
Now showing items 721-740 of 1023
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Smooth Surface Approximation for Computing Pit Excavation Volume
(American Society of Civil Engineers, 1998)In this paper, a method of volume computation that combines the advantages and avoids the drawbacks of current methods is presented. Earlier methods of computing pit excavation volume were based on the trapezoidal or ... -
Three-Dimensional Azimuth of GPS Vector
(American Society of Civil Engineers, 1997)The azimuth of a line is a 2-dimensional (2D) phenomenon whose meaning is determined by its circumstance. With the advent of global positioning system (GPS) surveying and making spatial data computations in a 3D environment, ... -
Height System of Taiwan from Satellite and Terrestrial Data
(American Society of Civil Engineers, 1997)The global positioning system (GPS), satellite altimetry, tide records, differential leveling, and a geoid model have been used to study the height system of Taiwan, Republic of China. Using the International GPS Service ... -
Least Squares Weighted Coordinate Transformation Formulas and Their Applications
(American Society of Civil Engineers, 1997)Coordinate transformation is the process of determining and applying the relationship between two sets of coordinates. It answers the following question: “I know the coordinates of a point on one data source, what are the ... -
Pseudolite Augmentation for OTF Ambiguity Resolution in Shipborne Mode
(American Society of Civil Engineers, 1998)The use of a shore-based pseudolite to augment DGPS for on-the-fly (OTF) carrier phase ambiguity resolution in the marine environment is investigated. OTF ambiguity resolution results in cm-level tridimensional accuracies. ... -
Video System to Monitor Archeological Sites Using Ground-Based Photogrammetry
(American Society of Civil Engineers, 1998)An attempt was made to investigate the state-of-the-art use of a digital and near real-time system to monitor monuments and historical sites by integrating semiautomated PC-based computer vision and stereo-photogrammetric ... -
Field Test of Trimble 4000 Real-Time Kinematic GPS Survey System
(American Society of Civil Engineers, 1998)The California Department of Transportation (CALTRANS) conducted a field test of the Trimble 4000 SSE Real-Time Kinematic (RTK) GPS survey system in February and June of 1996. The object of the test was to independently ... -
Combination of Photogrammetry and Geodesy for Monitoring Deformations
(American Society of Civil Engineers, 1997)This paper presents a new approach combining photogrammetry with geodesy for solving the problem of monitoring deformations of a descending gas pipe of a large iron-smelting blast furnace. Owing to the limitation of access ... -
Guest Editorial
(American Society of Civil Engineers, 1998) -
Digital Terrain Model: Elevation Extraction and Accuracy Assessment
(American Society of Civil Engineers, 1997)This paper discusses different techniques (analytical, manual, and automatic digital) of extracting digital terrain models (DTMs) and their error evaluation. DTMs are mainly used for orthorectification of images, topographic ... -
Quantification of Pavement Rut Depth Using Stereovision Technology
(American Society of Civil Engineers, 1997)An attempt to investigate the potential capabilities and accuracy of the PC-based stereovision system in quantification of pavement rut depth was performed. This process was demonstrated using three rutted sections of ... -
Reliability Measures for Correlated Observations
(American Society of Civil Engineers, 1997)Following the pioneering work by W. Baarda, surveying engineers routinely inspect the Studentized residuals after an adjustment when high reliability is crucial. To detect outliers among uncorrelated observations, the ... -
Effect of Mathematical Correlation on GPS Network Computation
(American Society of Civil Engineers, 1997)The precision and accuracy of positions obtained from the least-squares adjustment of Global Positioning System (GPS) data are dependent on the fidelity of the algorithms used to model the data. They are also dependent on ... -
Cosine Functions of GPS Carrier Phases for Parameter Estimation
(American Society of Civil Engineers, 1997)Ambiguity function methods are based on the magnitude of the sum of unit vectors (phasors) defined by differences between observed and calculated global positioning system (GPS) phase data, thereby eliminating integer ... -
Differences between NGVD29 and NAVD88 in Southeastern Wisconsin
(American Society of Civil Engineers, 1997)The Southeastern Wisconsin Regional Planning Commission (SEWRPC) has, over the past 30 years, established and promoted use of elevations referenced to the National Geodetic Vertical Datum of 1929 (NGVD29). Through international ... -
BOOK REVIEW
(American Society of Civil Engineers, 1997) -
Accuracy Assessment of Digitized Data with Randomized Block Model
(American Society of Civil Engineers, 1997)This study uses randomized block model variance analysis to assess factors affecting the quality of digitized data yielded by a digitizing tablet and desktop scanner. First, the geometric accuracy of a digitizing tablet ... -
Proof of Tienstra's Formula by Finite-Element Method
(American Society of Civil Engineers, 1997)Tienstra's formula is proven with a familiar idea, namely, natural coordinates in the finite-element method are the starting points. The proof is completed by an interesting application of modern computing technology—symbolic ... -
Editorial
(American Society of Civil Engineers, 1996) -
Error Mohr Circle and Invariants of Cofactor Coefficient
(American Society of Civil Engineers, 1996)In this paper, Mohr's circle is used as an implement to show the position error distribution. Using the circle, the four components of the cofactor coefficient matrix, in the two-dimensional case, can be expressed conveniently. ...