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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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The Korean Society for Geospatial Information System
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Volume & Issues
Volume 3, Issue 2 - Dec 1995
Volume 3, Issue 1 - Jun 1995
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원격탐측과 GSIS에서의 자료 형태와 구조
Park, Hong-Gi ;
Journal of Korean Society for Geospatial Information System, volume 3, issue 1, 1995, Pages 11~16
A Study on the Optimization of Coordinate System for Digital Mapping
Kim, Yong-Il ; Lee, Chang-No ;
Journal of Korean Society for Geospatial Information System, volume 3, issue 1, 1995, Pages 37~44
Cartesian coordinate systems used in national base map have 3 zones. If these coordinate systems are used at navigable digital maps without modifications, the edge-matching errors will occur near the edge of two zones. Therefore, it's required to eliminate separate zones of national plane coordinates system suitable far navigable digital map, we choose TM projection that is used at national base map but changed the location and the scale distortion of antral meridian.
The Design of Geographic Information System based on Object Grouping
Kang, Shin-Bong ; Joo, In-Hak ; Choy, Yoon-Chul ;
Journal of Korean Society for Geospatial Information System, volume 3, issue 1, 1995, Pages 45~54
The relational data model is based on mathematical concept of relations and is well formulated, and so there have been numerous practical applications and studies. However, it is not suitable for representing a complex hierarchical structure, which is the characteristic of most geographical objects. On the other hand, the object-oriented data model can naturally represent a complex hierarchical structure, but there is a difficulty in sharing data with the relational data model which is currently used by most commercial GIS users. Also it has no standard query language with standardized format. In this paper, we propose an Object Grouping based on RDBMS to use data from a traditional relational data model while supporting various concepts of the object-oriented data model, and we applied this data model to design a GIS.
A Study on the Improvements of Positioning Accuracy of Digital Elevation Model Using SPOT Satellite Triplet Images
Cho, Bong-Whan ; Lee, Yong-Woong ; Shin, Dae-Shik ;
Journal of Korean Society for Geospatial Information System, volume 3, issue 1, 1995, Pages 55~66
Most studies using satellite images have been performed to determine three dimensional positioning by stereoscopic analysis for stereo-pair or to extract digital elevation model by stereo matching using image correlation techniques. Because the small errors on the ground control points have a great impact on the results, however, it is hard to get reliable products when we analyze satellite orbital parameters or acquire digital elevation model by using only stereo-pair. Also, if there are noises, shadows, or clouds on the one of stereo pair, it is difficult to produce DEM(digital elevation model) on the area under analysis or to have good accuracy. In these case, it can be solved by systematic analysis of the multiple stereo images. This paper suggests the improvements on the accuracy of the digital elevation model by the developments of stereoscopic analysis techniques for the triplet of SPOT satellite images on the same area.
GIS Transfer Standards : Review and Issues
Kim, TsChang-Ho ;
Journal of Korean Society for Geospatial Information System, volume 3, issue 1, 1995, Pages 67~78
Many countries in the world have already begun digitizing spatial objects and features located in either above -or under- ground in order to conduct various spatial analyses including disaster prevention planning. At the same time, the amount of information to be exchanged will be astronomical once the information super highways will be completed to connect many countries in the world Ways to exchange and transfer of spatial information. efficiently will have to be developed in order to avoid duplicated efforts and money and to maximize the use of spatial information 1hat has already been collected. One way to maximize the efficiency in sharing spatial information is to develop a transfer standard. thus, the purpose of this paper is to review spatial data transfer standard(SDTS) with the hope that it would shed light on the development of a transfer standard for Korea
A Study on the Generation of 3 Dimensional Graphic Files Using SPOT Imagery
Cho, Bong-Whan ; Lee, Yong-Woong ; Park, Wan-Yong ;
Journal of Korean Society for Geospatial Information System, volume 3, issue 1, 1995, Pages 79~89
Using SPOT satellite imagery, 3 dimensional geographic information can be obtained from SPOT's oblique viewing image. Especially, SPOT provides high spatial resolution, adequate base/height ratio and stable orbit characteristics. In this paper, 3D terrain features were extracted using SPOT stereo image and also the techniques for generation of 3D graphic data were developed for the extracted terrain features. We developed computer programs to generate automatically 3D graphic files and to display geographic information on the computer screen, The results of this study may be effectively utilized for the development of 3D geographic information using satellite images.
A Heuristic Algorithm for Designing Traffic Analysis Zone Using Geographic Information System
Choi, Kee-Choo ;
Journal of Korean Society for Geospatial Information System, volume 3, issue 1, 1995, Pages 91~104
The spatial aggregation of data, in transportation and other planning processes, is an important theoretical consideration because the results of any analysis are not entirely independent of the delineation of zones. Moreover, using a different spatial aggregation may lead to different, and sometimes contradictory conclusions. Two criteria have been considered as important in designing zone systems. They are scale and aggregation. The scale problem arises because of uncertainty about the number of zones needed for a study and the aggregation problem arises because of uncertainty about how the data are to be aggregated to from a given scale problem. In a transportation study, especially in the design of traffic analysis zone(TAZ), the scale problem is directly related to the number dof zones and the aggregation problem involves spatial clustering, meeting the general requirements of forming the zones system such as equal traffic generation, convexity, and the consistency with the political boundary. In this study, first, the comparative study of delineating spatial units has been given. Second, a FORTRAN-based heuristic algorithm for designing TAZ based on socio-economic data has been developed and applied to the Korean peninsula containing 132 micro parcels. The vector type ARC/INFO GIS topological data mosel has been used to provise the adjacency information between parcels. The results, however, leave some to be desired in order to overcome such problems as non-convexity of the agglomerated TAZ system and/or uneven traffic phenomenon for each TAZ.
Generation of 3-Dimensional Landscape Map from Aerial Photos
Yeu, Bock-Mo ; Jeong, Soo ; Kim, Won-Dae ;
Journal of Korean Society for Geospatial Information System, volume 3, issue 1, 1995, Pages 105~113
Three-dimensional landscape map is very useful in terrain analysis as it looks like real shape of terrain. When three-dimensional landscape map is needed, landscape photos achieved at a position of high elevation or by airplane are generally used. But, this approach can not fully satisfy the user's need to get pictures from various view points. In addition, because photos have some geometric displacement caused by the principle of central projection of camera, it is hard to get accurate locations from the photo. This paper aims to get three-dimensional landscape map similar to real terrain feature from vertical stereo aerial photos by digital photogrammetric techniques. This approach can provide a very useful data for three-dimensional terrain analysis as a function of Geo-Spatial Information System.
Theoretical Background for Data-driven Integration of Raster-based Geological Information
Lee, Ki-Won ; Chi, Kwang-Hoon ;
Journal of Korean Society for Geospatial Information System, volume 3, issue 1, 1995, Pages 115~121
Recently, spatial integration for mineral exploration is regarded as an important task of various geological applications of GIS. Therefore, theoretical bases of data representation and reasoning concerned with Dempster-Shafer theory and Fuzzy theory were systematically as the data-driven integration methodologies for raster-based geoinformation; they are distinguished from target-driven methodology based on statistical background. According to previous actual applications of these methods to mineral exploration, they have been proven to provide useful information related to hidden target mineral deposits, and it is thought that some suggestions in this study are helpful to further real applications including representation, reasoning, and interpretation stages in order to obtain a decision-supporting layer.
Accuracy Evaluation and Test of Digital Map for Geo-Spatial Information System
Yeu, Bock-Mo ; Kwon, Hyun ; Pior, Myoung-Young ;
Journal of Korean Society for Geospatial Information System, volume 3, issue 1, 1995, Pages 123~137
The digital information of Land is very important as the basis of geo-spatial information system. And the necessity of it is also increasing. But these days, every other institute that is needing digital map is seperately digitalizing lsnd information. So we need the stadard of accuracy evaluation and the method of hypothesis test for it. In this study, we check the standards of foreign countries and compare and analyze with our country's. After doing it, we suggest the direction for standard of digital map and statistical methods for testing accuracy evaluation about total maps that is digitized. Using hypergeometric distribution for considering consumer risk and producer risk, the statistical test can be for deciding optimal sampling map numbers by the total map and the agreement of contacting parties.
Development of Expert System for Land Use Suitability Analysis Using Quadtree Data Structures
Yoo, Hwan-Hee ; Kim, Eui-Myoung ;
Journal of Korean Society for Geospatial Information System, volume 3, issue 1, 1995, Pages 139~150
The assessment/evaluation of land use suitability is an important part of land use planning. In this paper, we developed. The Expert System for a suitability analysis including the function of data storage, analysis, assessment and display by using Borland C++ Language and could suggest the following results in the suitability analysis to select a site for an industrial complex using this system. 1. With the increase in volume and variety of geo-spatial data now available, it has become necessary to find more efficient ways of storing this data. This report presents the Quadtree structure, as a method of gaining significant savings over conventional raster processing in data storage. 2. In order to get the criteria of suitability analysis, the opinions of specialists, administrative officers and citizens were collected by a questionnaire, and used to calculate the weight of geo-spatial data. Also, The Expert System, which we developed, was designed to do overlay and spatial analysis, as well as reflect the various opinions we collected in the questionnaire. The Expert System is expected to be used in other land use planning.