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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Society for Geospatial Information System
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Journal DOI :
The Korean Society for Geospatial Information System
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Volume & Issues
Volume 7, Issue 1 - Sep 1999
Volume 7, Issue 2 - Jun 1999
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Development of New Address Management System using GSIS
Yang, In-Tae ; Choi, Young-Jae ; Kang, Youn-Sup ;
Journal of Korean Society for Geospatial Information System, volume 7, issue 2, 1999, Pages 15~22
New Address System have been defined by section belonging to a road To manage this New Address System the relationship between road and section must have consistency and convenience. So, It have to be designed not only logical relation but physical relation for The relationship between road and section. To make New Address Management System considered the relationship, It must be design database considered the relationship. In this study, therefore would like to present the database design considered the relationship between road and section. And then using GSIS system, New Address Management System have been developed.
Alternative Methods for Assessments of DEMs' Erros
Hwang, Chul-Sue ;
Journal of Korean Society for Geospatial Information System, volume 7, issue 2, 1999, Pages 23~34
The most widely used measure for indicating the accuracy of DEM is RMSE(nut Mean Square Error), which is used by many national mapping agencies such as the USGS and the Ordnance Survey. Its prevalent use can be followed by the relative ease of calculation and understanding the concepts. However, there are many problems with the measure and the way from which it is often derived. First of all, the index does not involve my description of the mean donation between the two measures of elevation,. This means that it cannot interpret the distributions or patterns of errors involved in DEMs. The distribution of errors in DEMs will show some forms of spatial patterning. In order to explore the real quality of DEMs as a useful database, alternative approaches are needed. In this paper, we examined so called ESDA(Exploratory Spatial Data Analysis) approaches, which were attributed by both aspatial and spatial exploration methods. Our experimental research shows that even simple ESDA methods reveal new aspects of errors, especially spikes, striation, and terracing effect in DEMs, which my be ignored by RMSE measure.
Automation of Aerial Triangulation by Auto Dectection of Pass Points
Yeu, Bock-Mo ; Kim, Won-Dae ;
Journal of Korean Society for Geospatial Information System, volume 7, issue 2, 1999, Pages 47~56
In this study, tie point observation in aerial triangulation was automated by the image processing methods. The technique includes boundary extraction and We matching processes. The procedures were applied to extract points of Interest and to find their conjugate points in the other images. The image coordinates of the identified points were then used to compute their absolute coordinates. An algorithm was developed in this study for the automation of observation in aerial triangulation, which is a manual process of selecting a tie point and recording the image coordinate of the selected point. The developed algorithm automates this process through the application of a mathematical operator to extract points of interest from an arbitrary image. The root m square error of image coordinates of the developed algorithm is
, which is close to that of the present analytical method. In a manual environment, the accuracy of the result of a photogrammetric process is heavily dependant on the level of skill and experience of the human operator. No such problem exists in an automated system. Also, as a result of the automated system, the time spent in the observation process could be reduced by a factor of 61.2%, thereby reducing the overall cost.
Analysis of Overlay Accuracy in Digital Topographic Map and Cadastral Information Using Ortho Image map
Kang, Joon-Mook ; Choi, Jong-Hyun ; Kang, Young-Mi ;
Journal of Korean Society for Geospatial Information System, volume 7, issue 2, 1999, Pages 57~68
In case of topographic information construction it is most important as basemap determines the success or failure of GIS It is argument that digitizing works of basemap are divided by NGIS and PBLIS. So, it have to accompany the combination and application of cadastral information for constructing a usful basemap. In this study, we generated ortho image map using 1:5,000 aerial-photography image, present the comparative analysis for the overlay accuracy and map revision of topographic and cadastral information using ortho image map to base map. So, we present application schemes for land use, environment, and city planning field as well as union database by overlaying of image map and cadastral information.
Development of a Bridge Disaster Management System Using GIS
Ahn, Ki-Won ; Yoo, Hwan-Hee ; Choi, Yun-Soo ; Shin, Sok-Hyo ;
Journal of Korean Society for Geospatial Information System, volume 7, issue 2, 1999, Pages 69~80
The purpose of this study is to develop a Bridge Disaster Management System for bridge safety control using Geographic Information Systems(GIS). The constructed database includes several graphic layers such as basemap, road, bridge location, etc. and has related text attributes for 32 bridges and its facilities in Chinju City. Using the language of Visual Basic 5.0, personal computer based Bridge Disaster Management System which has several functions for bridge safety analysis was developed. The developed GIS based Bridge Disaster Management System has the functions of fast and efficient data searching, file management, searching and management of bridge characteristics, bridge related map viewing, searching and management of traffic survey, bridge inspection and repair work results, and evaluating the bridge safety grades, etc..
Geospatial Information Extraction by using Digital Photogrammetry
Yeu, Bock-Mo ; Kim, Won-Dae ;
Journal of Korean Society for Geospatial Information System, volume 7, issue 2, 1999, Pages 81~91
The study on the updating of the database of Geo-Spatial Information System that is necessary condition to GSIS operation have executed actively. In this study, digital orthophotos were produced by using the product of digital photogrammetry process and then multiscale digital orthophoto maps were generated tv the concept of image pyramids. The produced digital orthophoto has 2.092 meters accuracy compared to 1:5,000 topographic map. This digital orthophoto can be implemented in various Geo-Spatial Information System, providing valuable spatial reference for other objects in the database.
Analysis of the Spatial Distribution for Forest Fire Areas using GSIS
Yang, In-Tae ; Yeu, Young-Geol ; Choi, Seung-Pil ; Kim, Eung-Nam ;
Journal of Korean Society for Geospatial Information System, volume 7, issue 2, 1999, Pages 93~100
Forest fires have been threats to natural resources, endangered species, properties and even to human lives. Efficient management of forest fires requires a complete understanding of the environmental and human related activities, as well as complicate spatial relationships among them. A geo-spatial information system(GSIS) is an appropriate method of being able to mapping and to analyze the spatial data for forest fires. Therefore, this study is to provide and classify the terrain, vegetation, life environment soil and geology factors, and to analyze spatial distribution for forest fire areas by applying the GSIS and the Remote Sensing technology. On the other hands, causes of increasing numbers of forest fires being occurred after In were assessed by comparing the normalized difference vegetation index((NDVI).
A Selection of Atmospheric Correction Methods for Water Quality Factors Extraction from Landsat TM Image
Yang, In-Tae ; Kim, Eung-Nam ; Choi, Youn-Kwan ; Kim, Uk-Nam ;
Journal of Korean Society for Geospatial Information System, volume 7, issue 2, 1999, Pages 101~110
Recently, there are a lot of studies to use a satellite image data in order to investigate a simultaneous change of a wide range area as a lake. However, in many cases of the water quality research there is one problem occured when extracting the water quality factors from the satellite image data because the atmosphere scattering exert a bad influence on a result of analysis. In this study, an attempt was made to select the relative atmospheric correction method, extract the water quality factors from the satellite image data. And also, the time-series analysis of the water quality factors was performed by using the multi-temporal image data.
A Study on the Land Development Administration System in the Local Self-Government
Hwang, Eui-Jin ;
Journal of Korean Society for Geospatial Information System, volume 7, issue 2, 1999, Pages 111~122
Since 1980 the Korea Land Development Coporation has played a major role in land development by means of a Public Initiated Land Development Scheme. This strategy has attempted to correct the market failure of the generation of large sum of windfall profits. In accordance with reimplementation of the local autonomous ruling system since 1991, the demend for local government initiated land development have increased rapidly as local governments attempt to math the influence of national local development policy. In this regards, it is very useful for urban planners to analyze the merits and dismerits of the local government initiated land development schemes in view of national agency's development. This paper recommends several mitigation measures to improve the settlement of the local government initiated land development scheme.
A study on the process of mapping data and conversion software using PC-clustering
WhanBo, Taeg-Keun ; Lee, Byung-Wook ; Park, Hong-Gi ;
Journal of Korean Society for Geospatial Information System, volume 7, issue 2, 1999, Pages 123~132
With the rapid increases of the amount of data and computing, the parallelization of the computing algorithm becomes necessary more than ever. However the parallelization had been conducted mostly in a super-computer until the rod 1990s, it was not for the general users due to the high price, the complexity of usage, and etc. A new concept for the parallel processing has been emerged in the form of K-clustering form the late 1990s, it becomes an excellent alternative for the applications need high computer power with a relative low cost although the installation and the usage are still difficult to the general users. The mapping algorithms (cut, join, resizing, warping, conversion from raster to vector and vice versa, etc) in GIS are well suited for the parallelization due to the characteristics of the data structure. If those algorithms are manipulated using PC-clustering, the result will be satisfiable in terms of cost and performance since they are processed in real flu with a low cos4 In this paper the tools and the libraries for the parallel processing and PC-clustering we introduced and how those tools and libraries are applied to mapping algorithms in GIS are showed. Parallel programs are developed for the mapping algorithms and the result of the experiments shows that the performance in most algorithms increases almost linearly according to the number of node.
A Study on Development of Bridge Maintenance and Management System Using GSIS
Yeu, Bock-Mo ; Joo, Hyun-Seung ;
Journal of Korean Society for Geospatial Information System, volume 7, issue 2, 1999, Pages 133~141
Collapse of a huge structural material has brought about enormous loss of lives and property. Every construction may be destroyed by the nature's power and careless mistake of human as well as its own defect. So a great number of concern and detailed managing technique are demanded not in constructing work but also in management of constructed material. The Interest of construction safety has Increased rapidly and a plenty of effort has been attempted to manage systematically. In this study, the use of FM(Facilities Management) as a branch of GSIS(Geo-spatial Information System) was developed to offer the users convenient managing achievement and establishment of history managing system in the bridge management system. This study accomplished dividing all information of images, photos, drawing and etc. into their items of time, material and the person in charge, and developed to stue and maintain those items in database. Related database which is composed of recording of check, retrieving and adding the data was accomplished to an easy access of database, and by using these data as output for example images, m display, report and hard copy, this system was proved to help manage efficiently in bridge management system.
Development of Low-Cost Data Acquisition Method for Close-range Digital Photogrammetric System
Park, Hong-Gi ;
Journal of Korean Society for Geospatial Information System, volume 7, issue 2, 1999, Pages 143~153
GIS have become easier to use and very popular. In recent year digital photogrammetric systems ire becoming cost-effective tools to build and update GIS databases. In close-range photogrammetry for the acquisition of geospatial data, the bundle adjustment needs both initial approximate values and control points to solve the exterior orientation parameters. This paper gives a review of applied and potential algorithms for estimating Initial approximate values before the bundle adjustment, develope new algorithms for determine the exterior orientation parameters, and gives a cost-effective methods for close-range digital photogrammetric system Modifications of existing DLT algorithm were made in this study for providing an efficient, economic, and more accurate photogrammetric data reduction technique. These modifications include robust approaches for automatic detection and elimination of all lands of gross errors in the measurement data, and incorporation of GPS to reduce the number of control points necessary for a DLT solution. Also, this paper derives a new method for space resection from a monocular image. A major advantage of proposed method is that the solution can be uniquely and analytically determined without initial approximate values of exterior orientation parameters and without iterative computation.