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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
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 10, Issue 5 - Dec 2002
Volume 10, Issue 4 - Dec 2002
Volume 10, Issue 3 - Sep 2002
Volume 10, Issue 2 - Jun 2002
Volume 10, Issue 1 - Mar 2002
Selecting the target year
A Study on the Geomorphological Characteristics of Environmental Management in Watershed
Sung, Hyo-Hyun ; Ryu, Joong-Hi ; Ban, Hyo-Won ;
Journal of Korean Society for Geospatial Information System, volume 10, issue 4, 2002, Pages 17~30
Since the industrialization spread out, the metropolitan areas of Seoul have been urbanized rapidly in Korea, without concern for the quality of further development and sufficient environmental management. Due to this fact, it has become increasingly apparent that natural hazards, such as floods and landslides, occur frequently after the summer's heavy rains, and because of that, the scale of damage is getting larger. The purpose of this study is first to analyze the relationship between development and floods in the sub-basins of the study area. In addition to this, we'd like to compare the influences of geomorphological characteristics upon the floods occurring in both the whole study area and the developed area in sub-basins.
Video GIS using Virtual World Mapping Technique
Kim, Sung-Soo ; Lee, Seong-Ho ; Kim, Kyung-Ok ; Lee, Jong-Hun ;
Journal of Korean Society for Geospatial Information System, volume 10, issue 4, 2002, Pages 31~39
In this paper, we propose Media CIS system architecture which provides geographical information of geo-features in video sequences by using 3D geographical database and GPS-related data resulted from 4S-Van. We introduce a novel interoperable geographical data service concept, so-called, Virtual World Mapping (VWA) that can map 3D graphic world with real-world video to provide geographical information. Our proposed method can easily retrieve geographical information and attributes to reconstruct 3D virtual space according to certain frame in video sequences. Our proposed system architecture also has an advantage that can provide geographical information service with video stream without any image processing procedures. In addition to, describing the details of our components, we present a Media GIS web service system by using GeoVideo Server, which performs VWM technique.
Modification of IKONOS RPC Using Additional GCP
Bang, Ki-In ; Jeong, Soo ; Kim, Kyung-Ok ; Cho, Woo-Sug ;
Journal of Korean Society for Geospatial Information System, volume 10, issue 4, 2002, Pages 41~50
RPM is the one of the sensor models which is proposed by Open GIS Consortium (OGC) as image transfer standard. And it is the sensor model for end-users using IKONOS, a commercial pushbroom satellite, imagery which provide about 1m ground resolution. Parameters called RPC which is IKONOS RFM coefficients are serviced to end-users. But if some users try to make additional effort to get rigorous geo-spatial information, it is necessary to apply mathematic or abstract sensor models, because vendors don't offer any ancillary data for physical sensor models such as satellite orbit and navigation. Abstract sensor models such as pushbroom Direct Linear Transform (DLT) require many GCPs well distributed in imagery, and mathematic sensor model such as RFM, polynomials need much more GCPs. Therefore RPC modification using additional a few GCPs is the best solution. In this paper, two methods are proposed to modify RPC. One is method to use pseudo GCPs generated in normalized cubic, and another method uses parameters observations and a few GCPs. Through two methods, we get improvement of accuracy 50% and over.
Positional Accuracy of Road and Underground Utility Information
Park, Hong-Gi ; Shin, Dong-Bin ;
Journal of Korean Society for Geospatial Information System, volume 10, issue 4, 2002, Pages 51~60
As the use of GIS becomes more widespread, the quality and source of data is becoming more of a concern among users. But accuracy is a component of quality, and the positional accuracy is a component of total accuracy. If only we consider the positional accuracy, simultaneously collecting technology of location and attribute information, whether it be manually, using conventional surveying method, GPS, or remote sensing, is a practical way of insuring that location and attribute information are correctly correlated. This study analyse the positional accuracy from a view-point of user and supplier, which is the considerations that can ensure quality level and continuously maintain the road and underground utility information. The positional accuracy of road and underground utility information are considered as two categories - expected accuracy of data collection procedure, required accuracy of data usage process. And the project manager must consider the cost/benefit view of data generation in order to determine the surveying method.
Precision Analysis of GPS Surveying Using Continuos Stations
Choi, Byoung-Gil ; Kim, Young-Kon ; Ko, Jung-Kyu ;
Journal of Korean Society for Geospatial Information System, volume 10, issue 4, 2002, Pages 61~67
This study is aimed to suggest a practical use of GPS continuous stations by conducting the precision analysis using its data. Currently dozens of continuous stations have been installed and operated since the first GPS continuous station built by KAO(Korea Astronomy Observation) in 1985. The utilization of the surveyed information, however, has been under-developed regardless of a significant investment, which leads the necessity of utilization plan. The results of this study show that the mis-closures between the two points at University of Incheon and Suwon/Seoul stations of NGI(National Geography Institute), Seoul stat ion of KAO, and Incheon station of MOGAHA(Ministry Of Government Administration and Home Affairs) are 0.0206m, 0.0118m, 0.0129m and 0.0024m respectively. It indicates that the analyzed mis-closures were less than the allowed values ill the primary/secondary control point specification for GPS surveying, i.e. a mis-closure less than 30mm for the distance less than 30km and a mis-closure less than
for the distance greater than 30km.
Production of A Plane Figure of Campus with RTK GPS and TS
Lee, In-Su ; Lee, Kee-Boo ; Park, Woon-Yong ;
Journal of Korean Society for Geospatial Information System, volume 10, issue 4, 2002, Pages 69~76
Nowadays information is very important for Civil Engineering. This information is acquiredmostly via Surveying & Geo-spatial Information System. Also this information is close to the ITS(Intelligent Transformation System), Navigation, Facility Management, and Digital Mapping, etc and applicable to versatile fields from now on. And in surveying fields, GPS satellites are introduced newly and play a great rules. In this study, RTK(Real-Time Kinematic GPS), one of the positioning technology with GPS satellites, is used for the production of Plane Figure of Campus. The results shows that it is possible to extract the information for some part of a flowerbed and road, but not so for the buildings surrounded. Therefore this give occasion to the a lowering of work effectiveness over the total work-flow. So at such a time, it will be expected that the supplementary systems such TS(Total Station), Plane-table, and theodolite, etc have to be used.
The Extacting Crack in Asphalt Concrete Pavement by Digital Image Processing
Jang, Ji-Won ;
Journal of Korean Society for Geospatial Information System, volume 10, issue 4, 2002, Pages 77~84
Recently, damage of pavement represented by crack is depened by the increase of traffic demand up to ten million and wight, and interest about the efficient management of pavement is being increased gradually according to the growth of maintenance expense of road surface. In this study, the possibility of application for acquisition of crack information was tested by appling DCRP and digital image processing technique and measuring crack on road surface precisely. Based on this, objective and efficient road surface measurement was planned and done. Measuring crack width, acquire result of comparative high accuracy. So, it is considered that it can be utilized as plan draft data for deterioration estimation and repair reinforcement work of pavement.
A Study on Cost-Benefit Analysis for Geographic Information
Kim, Kye-Hyun ; Park, Hong-Gi ; Kim, Kwang-Ju ; Choi, Hoon-Sung ; Song, Yong-Cheol ; Park, Tae-Og ;
Journal of Korean Society for Geospatial Information System, volume 10, issue 4, 2002, Pages 85~93
Since the National Geographic Information System(NGIS) project of 1995, the geographic information projects have been promoted in various areas such as central and local governments. In the fact that large scale budget has been invested to geographic information projects as a national policy, the cost-benefit analysis would be essential to enhance the efficiency of the resource allocation. In this circumstance, this study analyzes the costs and benefits of geographic information produced by NGI(National Geography Institute). As a result of the cost-benefit analysis, the total amount of benefits were estimated approximately 620 million dollars and the accumulated ratio of the cost to benefit was 1 to 4.4. Also, the internal ratio of the benefit was 38%, which justified the large scale investment. In case of adding qualitative benefits which can not be measured in a quantitative term, the overall benefits from using such geographic information would be much higher than quantitative benefits. Further research work is required for more objective verification of the large scale national project such as building nationwide geographic information.
Evaluation of horizontal position Accuracy of Facilities in Digital Map
Choi, Seung-Pil ; Yang, In-Tae ; Cho, Jee-Hyun ;
Journal of Korean Society for Geospatial Information System, volume 10, issue 4, 2002, Pages 95~103
The accuracy of Digital Map does not meet the user's expectation, including the many errors caused while producing the project, this will be useless resulting waste of enormous national budget. To solve this Accuracy problem, clear regulations about the position accuracy of scaled Digital Map should be set immediately and provide the users with accurate information about Digital Map enabling the users to use Digital Map for each GIS application field. For this reason, the position accuracy evaluation of existing Digital Maps produced in diverse methods is on demand. In this study, therefore, we performed horizontal position survey of local selected Facilities Total Station equipment to evaluate the horizontal position accuracy of 1:1,000, 1:5,000 scaled Digital Map, obtained standard deviation using the results, performed T-Test to confirm the presence of bias and evaluated the position accuracy of Digital Map.