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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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Journal DOI :
Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography
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Volume & Issues
Volume 6, Issue 2 - Dec 1988
Volume 6, Issue 1 - Jun 1988
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A study on the Accuracy Analysis of Quadrilateral Nets by Analytical Methods
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 6, issue 1, 1988, Pages 3~12
The objective of this paper is to study the characteristics of combination method to correct both angle and distance errors simultaneously based on the least square adjustment methods. Changing the standard errors of distance and angle, the simulation errors of triangultion, trilateration, and combination result in some 39.8%, 33.9%, and 26.3% respectively. As the above, combination method shows more consistent accuracy than other methods. When considering the weight factor about error elements with independence, the diminishing rate of simulated average standard error represents a various change in each method. But considering them simultaneously, it shows a remarkable rate of diminishing 75.5%, 74.1%, and 69.2% in each method. And also, by growing the weight factor, accuracy of triangulation method is growing, whereas that of trilateration is diminishing. Therefore, determining the reasonable weight factors of distance and angle errors simultaneously in the analytical combination method, this method is expected to be one of more accurate and more effective methods for determining horizontal positions on the earth.
A Study on the Improvement of Accuracy for Deformation Measurement of Circular Structures by Multiple Method
Raymond J. Hintz ; Mook, Kang-Joon ; Jin, Oh-Won ;
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 6, issue 1, 1988, Pages 13~24
The determination of three-dimensional positions on a circular or cylindrical surface covers a variety of applications. As an example, consider the monitoring of structures, which is an important topic in the broad category of deformation analysis. The use of convergent photography in determination of these positions has the many advantages over survey based procedures. This paper illustrates results from bundle adjustments derived from convergent photography of a cylindrical object, with both metric and non-metric cameras utilized in the test. In addition to standard error comparisons resulting from the error analysis provided by the bundle adjustments, object space coordinates resulting from metric and non-metric camera network geometries will also be compared.
A Study on Progressive Sampling with Distinct Morphologic Features
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 6, issue 1, 1988, Pages 25~34
Digital Terrain Model is composed of two basic elements, namely, sampling and interpolation. They represent the procurement of data and the geometric reconstruction of terrain relief respectively. For evaluation DTM data, following two paremeters appear to be the most important factor, that is, the accuracy and efficiency and, in particular, the break point information significantly affect to the accuracy of DTM data. The main objective of this study is to improve the accuracy and efficiency of DTM by applying Progressive Sampling with distinct morphologic information. In this study, the total of 240 individual numerical tests has been implemented and the appropriate computer program is also developed for the test. The result of investigation shows that the Progressive Sampling with break point information improves the accuracy of DTM by 30 percent approximately.
Reliability Analysis of the Three-Dimensional Deformation Measurement by Terrestrial Photogrammetry
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 6, issue 1, 1988, Pages 35~41
In the three dimensional deformation analysis by terrestrial photographs, iterative reweighted similarity transformation method is used for more accurate displacement computation. Also, Bayesian Inference method is used in the detection of unstable points and the analytical method for displacement patterns analysis is proposed in this study. In results, the accuracy of displacement estimation was improved by applying the weights of least absolute method (
｜d｜⇒min) and more accurate detection of displaced points could be achieved by Bayesian Inference. The analytical method in the patterns of displacement proposed in this study could be adapted to the movement analysis of objects wholly or partly.
The Study on the Application of Free Networks in Leveling
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 6, issue 1, 1988, Pages 42~47
In this study bias estimation method was applied to the free leveling networks adjustment by the concepts of free leveling networks. Optimum bias coefficients were determined by analizing the distribution of height errors with regard to bias coefficients. The object of this study lies in suggesting the utilities of free leveling networks adjustment, comparing one fixed-point and two fixed-points leveling networks adjustment.
A Study on the Rational Method in the Traffic Accident Treatment
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 6, issue 1, 1988, Pages 48~57
In a traditional method to clarify causes of traffic accidents by using tapes, there appeared its limitation of reliability on the inspection of accident. With only limitted number of people and equipments, it is almost impossible to inspect and examine the causes of traffic accidents while not resulting a traffic complexity and its impediment. In this paper, as an approach to such problems, a rationalization in treatment of the traffic accidents was tried to be found, as accurately measuring 3-dimensional co-ordinates between the needed points by the stereo-models pictured by a stereo-camera, then composing some plane figures which show places and vehicles concerning the accidents, abstracting some needed informations from the resultants, and supplementing to solve problems on the pre-existing method, and sometimes when needed, enabling to treat the troubled points by reappearing those points.
A Study on the Korean Old Maps
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 6, issue 1, 1988, Pages 59~66
It is known that the Korea has a long history in map production. On the contrary, a few literatures and materials of the ancient maps are available by the time being and there is something yet to study more. Therefore, it is not often discover the publishing date, technical standard of the ancient maps, and etc. The objective of this study is to examine the history of the old maps and is also to show the guideline of the study in future.