Journal of Surveying Engineering: Recent submissions
Now showing items 701-720 of 1023
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Simple Approximation of Area Determination on Mercator Chart of Sphere
(American Society of Civil Engineers, 1999)In this paper, simple approximate methods have been given to calculate the true value of an area on a Mercator chart. The introduction touches on the general characteristics of Mercator projection, and the area deformation ... -
Total Least-Squares Spiral Curve Fitting
(American Society of Civil Engineers, 1999)A rapidly convergent algorithm for fitting clothoids to measured points is developed and tested. The second-order, reduced Hessian method, broadly applicable to the class of scalable, -
Reliabilities of χ<sup>2</sup>- and F Tests in Gauss-Markov Model
(American Society of Civil Engineers, 1999)Power and level breakdown points are used in robust statistics to determine the global reliability of a test. A method for calculating the finite-sample versions of these for tests such as χ -
Single Processed Independent and Trivial Vectors in Network Analysis
(American Society of Civil Engineers, 2000)Software for processing single vectors is often used to densify geodetic networks based upon global positioning system (GPS) data. When operating more than two GPS receivers in the same survey session, the covariance ... -
LSA for Validation of Digitized Rectangular and Straight-Line Features
(American Society of Civil Engineers, 1999)The quality of digitized spatial databases directly affects many mapping applications and decision-making processes in geographic information systems (GIS). Because all information in GIS is, to some extent, related to ... -
GPS Heighting in Okavango Delta
(American Society of Civil Engineers, 1998)For the past three years, an annual campaign of global positioning system (GPS) measurements has been mounted in the Okavango Delta in Botswana, as part of a multidisciplinary research project. The project examines the ... -
Robustifying Conventional Outlier Detection Procedures
(American Society of Civil Engineers, 1999)The conventional outlier detection procedures, such as the methods of Baarda and Pope or the t-testing procedure, determine only one outlier reliably. The approach to robustifying these procedures is as follows: (1) To ... -
Tailored Datum Transformation Model for Locally Distributed Data
(American Society of Civil Engineers, 1999)A seven-parameter datum transformation model is constructed for transformations between the World Geodetic System (WGS84) datum and the Hong Kong 1980 local datum. The solution is tailored by biasing the height information ... -
Stochastic Modeling for Static GPS Baseline Data Processing
(American Society of Civil Engineers, 1998)In global positioning system (GPS) data processing, incorrect stochastic models for double-differenced measurements will result in unreliable statistics for ambiguity search and biased positioning results. In the commonly ... -
GIS-Based Approach to Sewer System Design
(American Society of Civil Engineers, 1999)In planning and design of sewer networks, most decisions are spatially dependent because of the right-of-way considerations and the desire to have flow by gravity. The geographic information system- (GIS-) based approach ... -
Errata
(American Society of Civil Engineers, 1998) -
Introducing Groupware to Distributed Geomatics Production Environments
(American Society of Civil Engineers, 1999)Geomatics firms are under competitive pressure to bring their products to market more quickly. Increasingly, production contracts involve multiparticipant, distributed project teams. This paper discusses the potential to ... -
Road Slope Information from GPS-Derived Trajectory Data
(American Society of Civil Engineers, 1999)The World Solar Challenge was held in 1996, and will be held again in 1999. As part of the University of New South Wales solar car project, global positioning system techniques were used to determine the road slope ... -
Editorial
(American Society of Civil Engineers, 1998) -
Proof of Tienstra's Formula for an External Observation Point
(American Society of Civil Engineers, 1998)As a continuation of the writers' previous work on establishment of Tienstra's formula via finite-element ideas for an internal observation point, the formula is proven for the case where the observation point lies outside ... -
Application of Equiredundancy Design to M-Estimation
(American Society of Civil Engineers, 1998)A new method of weighting that realizes equiredundancy design is introduced, and its convergence is better than the method introduced by Koch. However, if Koch's method is modified, it gives the best results compared to ... -
GIS Errors and Surface Hydrologic Modeling: An Examination of Effects and Solutions
(American Society of Civil Engineers, 1998)Hydrologic modeling increasingly involves the use of a geographic information system (GIS), usually in order to obtain the topographic features relevant to the hydrology of a study area. However, despite the increasing ... -
GLONASS Satellite Surveying
(American Society of Civil Engineers, 1998)Double differencing of the carrier phases is a popular technique in global positioning system (GPS) surveying for eliminating receiver and satellite clock errors. However, because each global navigation satellite system ... -
Three-Dimensional Positioning Using SPOT Stereostrips with Sparse Control
(American Society of Civil Engineers, 1998)This paper describes an experiment for a proposed scheme using on-board satellite data to perform three-dimensional positioning for a pair of SPOT stereostrips. Based on the sampling geometry of French SPOT satellite images, ... -
Bathymetric Surveying with GPS and Heave, Pitch, and Roll Compensation
(American Society of Civil Engineers, 1998)Field and laboratory tests of a shipborne hydrographic survey system were conducted. The system consists of two 12-channel GPS receivers (one onboard, one fixed on shore), a digital acoustic fathometer, and a digital ...