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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 21, Issue 4 - Dec 2003
Volume 21, Issue 3 - Sep 2003
Volume 21, Issue 2 - Jun 2003
Volume 21, Issue 1 - Mar 2003
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The Analysis of Road Alignement and Construction GSIS Using RTK GPS and TS
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 21, issue 4, 2003, Pages 293~299
In the future, the design of road should be convenient in using of high-technology information and it needs the design of alignment that is able to make the maximum vehicles inducement function appropriated for CNS(Car Navigation System). So it needs to analysis appropriately the alignment of road for the improvement design of road which is established and to make the design of road and the coordinate of the main points. Therefore, this research had acquired the road data by RTK-GPS to accurate the analysis of road alignment and compared with Total Station. As the result, we could acquire the design source of the road alignment using RTK-GPS. Also, it was estimated the accuracy after comparing the design with RTK-GPS coordinates. We made an analysis of the degree of slant or the ups and downs of surface. We made an analysis of three dimensional visual information which was included in GSIS concept and estimated the accuracy. Finally, we analyzed the earth volume calculation by comparing with Total Station.
Improving the Accuracy of 3D Object-space Data Extracted from IKONOS Satellite Images - By Improving the Accuracy of the RPC Model
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 21, issue 4, 2003, Pages 301~308
This study describes the methodology that improves the accuracy of the 3D object-space data extracted from IKONOS satellite images by improving the accuracy of a RPC(Rational Polynomial Coefficient) model. For this purpose, we developed the algorithm to adjust a RPC model, and could improve the accuracy of a RPC model with this algorithm and geographically well-distributed GCPs(Ground Control Points). Furthermore, when a RPC model was adjusted with this algorithm, the effects of geographic distribution and the number of GCPs on the accuracy of the adjusted RPC model was tested. The results showed that the accuracy of the adjusted RPC model is affected more by the distribution of GCPs than by the number of GCPs. On the basis of this result, the algorithm using pseudo_GCPs was developed to improve the accuracy of a RPC model in case the distribution of GCPs was poor and the number of GCPs was not enough to adjust the RPC model. So, even if poorly distributed GCPs were used, the geographically adjusted RPC model could be obtained by using pseudo_GCPs. The less the pseudo_GCPs were used -that is, GCPs were more weighted than pseudo_GCPs in the observation matrix-, the more accurate the adjusted RPC model could be obtained, Finally, to test the validity of these algorithms developed in this study, we extracted 3D object-space coordinates using RPC models adjusted with these algorithms and a stereo pair of IKONOS satellite images, and tested the accuracy of these. The results showed that 3D object-space coordinates extracted from the adjusted RPC models was more accurate than those extracted from original RPC models. This result proves the effectiveness of the algorithms developed in this study.
Rapid and Accurate GPS Data Processing with Ultra-rapid Orbits
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 21, issue 4, 2003, Pages 309~316
Rapid and accurate data processing is required in many GPS(Global Positioning System) applications including surveying. While one can use four different kinds of GPS satellite orbits, we evaluated the accuracy and precision of each kind of orbits to find the best candidate for rapid and accurate data processing. The four different kinds of orbits we: broadcast orbits from GPS satellites; and ultra-rapid orbits, rapid orbits, and precise orbits provided by international GPS data analysis centers such as IGS. With GIPSY and ultra-rapid orbits, we could get the positioning accuracy of 1.5cm from seven days of GPS data. From this study, we conclude that rapid and accurate data processing is achieved with GIPSY and ultra-rapid orbits.
Determination of Ocean Tidal Loading Components at GPS Permanent Stations
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 21, issue 4, 2003, Pages 317~322
This paper have calculated a relative heights of an each station using the data which were observed by GPS permanent stations(Chejudo, Homigoj, Jumunjin, Marado, Palmido, Ulengdo, Youndo) established in Korea. We performed spectrum analysis with a calculated relative heights by CLEAN algorithm. Through these process, we estimated vertical displacement of earth surface by semi-dinural ocean tidal loading components, and compared them with the results which were calculated by improving ocean tide model(NA099jb) for adjacent seas around Japan and Korea. As the result of this study, we determined the ocean tidal loading components with loading effects of
, and we noted that the amplitude and the phase lags of ocean tidal loading components from observed GPS data were almost equal to values calculated from ocean tide models. However, the loading components about semi-diurnal tide
couldn't estimate because of periods. Also, the diurnal ocean tide loading components were not considered, because the noise level have increased during the diurnal frequency.
Route Selection in the Network of Public Transportation using the GA and the GIS
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 21, issue 4, 2003, Pages 323~330
GIS-based applications for route guidance are increasingly developed recently, but most of them are for self
driven cars. Although some of them are intended for public transportation, they show limitations in dealing with time constraints problems taken place in transfer areas. Developing a public transportation guidance system requires the fallowing aspects: (i) people may change transportation means not only within the same type but also among different modes such as between buses and subways, and (ii) the system should take into account the time taken in transfer from one mode to the other. This study suggests the framework for developing a public transportation guidance system that generates optimized paths in the transportation network of mixed means including buses, subways and other modes. For this study, the Genetic Algorithms are used to find the best routes that take into account transfer time and other service-time constraints. The method for constructing the data structure in the GIS was also suggested.
Development of the Integrated Information Management System for Efficient Road Management
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 21, issue 4, 2003, Pages 331~339
It is difficult for the road management system to give a correct road information because road facilities are differently managed according to each object. In this study, we have solved this problem of road information management and, developed a system which is able to integrate various data of facilities and to maintain the latest property of data by introducing server-client network structure for managing road facilities more efficiently. And, we have shown the affairs of the road information management could be achieved scientifically, by the integration of graphic, attribute and photograph information relevant to road. This enabled the connection of graphic data and the stereo drawing composition, and enhanced the feeling of real world experience using the dynamic image data of the road.
Construction of the Internet Three-dimensional Map Server Using Linux Operating System and VRML
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 21, issue 4, 2003, Pages 341~346
For tendering three-dimensional map information using Internet, firstly Web server is considered, but generally the source code of commercial application is not open to the public and approaching the source technology is difficult. So, there are many limitations of the technology development. In this study, to solve these problems, we have introduced Linux operating system with open source system and utilized VRML to be able to practice three-dimensional spatial data on Web browser, and constructed the Internet three-dimensional map server. In the result, the constructed server is economical because there is no cost except the hardware, and the active maintenance and management is accomplished by using the opened source code.
Development of Horizontal Alignment Information System of Road Using Digital Photogrammetry
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 21, issue 4, 2003, Pages 347~353
Lately, Digital Photogrammetry has been increasingly applied to various hightech industries and becomes one of more interesting focuses of study than ever. Thus, this study aims to develop a Road Horizontal Alignment Information System by means of digital photogrammetry. Data acquired from digital photographic techniques were processed using Delphi, an object oriented programming language to develop a computer aided program, that allows us to build the information on Road Horizontal Alignment(Beginning Point of Curve, Ending Point of Curve, Radius, Intersection Point). The developed program could maximize visualization for better analysis compared with traditional programs because it utilizes many image data. Comparing with data from traditional horizontal alignment extraction programs based on the principle of least square method, the data acquired by Horizontal Alignment Information and kinematic GPS showed out of the developed road information systems the improved accuracy of IP value up to about 2m in the direction of X, Y axes, where the accuracy of curve radius(R) becomes enhanced up to about 2.5 m.
The Analysis of Position Stone Pagoda Cultural Heritages Using Video Image
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 21, issue 4, 2003, Pages 355~363
This paper Non-metric digital video camera against subject of study, stone cultural heritages such as stone pagodas(East & West three storied stone pagoda of dansoksa temple site), and easily acquire still-images which are for analyzing, from moving picture part. When we analyze a location of cultural assets using a Non-metric digital video camera, we could get a accuracy from 1.8mm to 8.3mm. Finally, it can be said that study also suggests the efficient measurement when planning to restore prototype of cultural heritages in the future and providing specific three-dimensional information on them.
The 3D Modelling of Cultural Heritage Using Digital Photogrammetry
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 21, issue 4, 2003, Pages 365~371
Digital high resolution cameras are widely available, and are increasingly use in digital close-range photogrammetry. And photogrammetry instruments are developing rapidly and the precision is improving continuously. The building of 3D terrains of high precision are possible and the calculation of the areas or the earthwork volumes have high precision due to the development of the techlique of the spatial information system using computer. Using the digital camera which has capacity of keeping numerical value by itself and easy carrying, we analyze the positioning error according to various change of photographing condition. Also we try to find a effective method of acquiring basis data for 3D monitoring of high-accuracy in pixel degree through digital close-range photogrammetry with bundle adjustment for local terrain model generation and 3D embodiment of tumulus. In the study is about to efficient analysis of digital information data fer conservation of cultural properties.
Evaluation of GPS and Totalstation Surveying for Facilities Mapping
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 21, issue 4, 2003, Pages 373~381
This study presents the detailed methods for facilities mapping using GPS and Totalstation. From the control survey by GPS network adjustment, the level of significance fur the height value of fourth order triangulation stations used in this study was estimated about 10cm. According to the result of verification for the transformation coefficients of national coordinate, which were announced by the National Geographic Information Institute, RMSE f coordinate transformation was found out as
0.546m that can be applied to a map scale less than 1/10,000. The accuracy analysis of height determination by Totalstation for the traverse points spaced average 90m showed that RMSE came out
9mm on the basis of direct leveling, so it indicated that trigonometric leveling by Totalstation was correct comparatively. The result of accuracy analysis of GPS/RTK surveying on traverse points showed that RMSE came out
33mm in horizontal location on the basis of Totalstation's outcome and
15mm in height value on the basis of direct leveling. In the construction survey, GPS/RTK surveying is quicker and more economical than Totalstation surveying in the feasible areas of GPS surveying. but there were many impossible areas for GPS/RTK surveying by the obstacles like a building.
A Study on Registering Buildings Into LIS
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 21, issue 4, 2003, Pages 383~392
In this study, we investigated 3 methods for precise registration of buildings into LIS. They are : 1. using digital topographic maps, 2. using registered building maps, 3. cadastral surveyings on sites. The first method was found that it hardly met required precision, and the second one was also lack of precision because of unmatched actual buildings with registered ones and many unregistered buildings. The last method produced the most precise results, although it required laborious cadastral surveyings on sites. Considering the importance of building registration as it shows the ownerships of properties, the third method was thou인t to be desirable.
A Study on Marine Pile Construction Management by Real-Time Kinematic GPS Positioning
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, volume 21, issue 4, 2003, Pages 393~401
Automatic control technologies for the marine pile driving provides accurate and rapid intruding into the planned positions of the pile with planned slope and direction, so that the construction maintenance and management are more efficient and the quality of the construction is more promising. Therefore, in this study, the application scheme of RTK GPS to the automatic control of the pile driving presented. It is expected that the presented scheme using the precise RTK GPS technique assures the efficient and economic 3D positioning accuracy for the precise marine construction management like the precise foundation of marine structures made of piles and the dredging work. It is found that the suggested scheme decrease 60% of the construction error compared with specifications reference because marine position accuracy is measured within 4cm in real time. In addition, the automatic position control system using GPS reduced the construction period and cost compared with existing methods about 30% and 35%, respectively.