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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 20, Issue 4 - Dec 2012
Volume 20, Issue 3 - Sep 2012
Volume 20, Issue 2 - Jun 2012
Volume 20, Issue 1 - Mar 2012
Selecting the target year
Estimating Volume of Martian Valleys using Adaptive TIN Filtering Algorithm
Jung, Jae Hoon ; Heo, Joon ; Kim, Chang Jae ; Luo, Wei ;
Journal of Korean Society for Geospatial Information System, volume 20, issue 3, 2012, Pages 3~10
DOI : 10.7319/kogsis.2012.20.3.003
The investigation of valley networks and their volume provide important information about past water activities on Mars. As an alternative of conventional image processing methods, terrain filtering algorithm using pointcloud data is suggested in this study. First, the topography of pointcloud is inverted so that the valleys become positive features and the algorithm is then applied to distinguish the valleys from the surface. Ground DEM and object DEM are generated from both the valleys and the surface pointcloud then the volume of valleys is estimated by multiplying the height difference between the surface with valleys and the area of valleys based on grid cellsize. In the test of valleys adjacent to Tuscaloosa crater, the total volume of valleys was estimated to be
with the difference of 12% and 16% compared with the infill volume of Tuscaloosa crater and BTH result respectively.
Development of Species Distribution Models and Evaluation of Species Richness in Jirisan region
Kwon, Hyuk Soo ; Seo, Chang Wan ; Park, Chong Hwa ;
Journal of Korean Society for Geospatial Information System, volume 20, issue 3, 2012, Pages 11~18
DOI : 10.7319/kogsis.2012.20.3.011
Increasing concern about biodiversity has lead to a rise in demand on the spatial assessment of biological resources such as biodiversity assessment, protected area selection, habitat management and restoration in Korea. The purpose of this study is to create species richness map through data collection and modeling techniques for wildlife habitat assessment. The GAM (Generalized Additive Model) is easy to interpret and shows better relationship between environmental variables and a response variable than an existing overlap analysis and GLM (Generalized Linear Model). The study area delineated by a large watershed contains Jirisan national park, Mt. Baekun and Sumjin river with three kinds of protected areas (a national park, a landscape ecology protected area and an otter protected area). We collected the presence-absence data for wildlife (mammals and birds) using a stratified random sampling based on a land cover in the study area and implemented natural and socio-environmental data affecting wildlife habitats. After doing a habitat use analysis and specifying significant factors for each species, we built habitat suitability models using a presence-absence model and created habitat suitability maps for each species. Biodiversity maps were generated by taxa and all species using habitat suitability maps. Significant factors affecting each species habitat were different according to their habitat selection. Although some species like a water deer or a great tit were distributed at the low elevation, most potential habitats for mammals and birds were found at the edge of a national park boundary or near a forest around the medium elevation of a mountain range. This study will be used for a basis on biodiversity assessment and proected area selection carried out by Ministry of Environment.
Temporal and Spatial Wind Information Production and Correction Algorithm Development by Land Cover Type over the Republic of Korea
Kim, Do Yong ; Han, Kyung Soo ;
Journal of Korean Society for Geospatial Information System, volume 20, issue 3, 2012, Pages 19~27
DOI : 10.7319/kogsis.2012.20.3.019
Wind is an important variable for various scientific communities such as meteorology, climatology, and renewable energy. In this study, numerical simulations using WRF mesoscale model were performed to produce temporal and spatial wind information over the Republic of Korea during 2006. Although the spatial features and monthly variations of the near-surface wind speed were well simulated in the model, the simulated results overestimated the observed values as a whole. To correct these simulated wind speeds, a regression-based statistical algorithm with different constants and coefficients by land cover type was developed using the satellite-derived LST and NDWI. The corrected wind speeds for the algorithm validation showed strong correlation and close agreement with the observed values for each land cover type, with nearly zero mean bias and less than 0.4 m/s RMSE. Therefore, the proposed algorithm using remotely sensed surface observations may be useful for correcting simulated near-surface wind speeds and producing more accurate wind information over the Republic of Korea.
Standardization and Application of Geographic Survey Datas in National Digital Map
Lee, Hyun Jik ; Ru, Ji Ho ; Lee, Hyuck Ho ;
Journal of Korean Society for Geospatial Information System, volume 20, issue 3, 2012, Pages 29~40
DOI : 10.7319/kogsis.2012.20.3.029
The method regarding obtaining various kinds of attribute data of spatial information, including that of digital map, is normally restricted to Geographic survey that deals with in-field surveys. Geographic surveying for drawing digital map, however, require much effort due to the fact that a surveyor has to characterize geographic features individually in the field. Not only does the Geographic survey cover large area, but also its need for manual drawing and surveying using Draft map makes it more expensive and time-consuming. Though some recent Geographic surveys take advantage of MMS(Mobile Mapping System) to collect computerized information, there are inevitable limits in creating digital map with such data. This research will analyze the problems in current Geographic surveys and suggest adequate methods and standards for Geographic surveys by researching the methods of domestic/international service organizations that deal with establishing spatial information. This study therefore will aim to enhance the efficiency of creating digital map and Geographic survey, which would ultimately maximize the applicability of pan-national digital map by improving reliability of digital map and upgrading the utilizability of Geographic survey data.
Automatic Estimation of Geometric Translations Between High-resolution Optical and SAR Images
Han, You Kyung ; Byun, Young Gi ; Kim, Yong Il ;
Journal of Korean Society for Geospatial Information System, volume 20, issue 3, 2012, Pages 41~48
DOI : 10.7319/kogsis.2012.20.3.041
Using multi-sensor or multi-temporal high resolution satellite images together is essential for efficient applications in remote sensing area. The purpose of this paper is to estimate geometric difference of translations between high-resolution optical and SAR images automatically. The geometric and radiometric pre-processing steps were fulfilled to calculate the similarity between optical and SAR images by using Mutual Information method. The coarsest-level pyramid images of each sensor constructed by gaussian pyramid method were generated to estimate the initial translation difference of the x, y directions for calculation efficiency. The precise geometric difference of translations was able to be estimated by applying this method from coarsest-level pyramid image to original image in order. Yet even when considered only translation between optical and SAR images, the proposed method showed RMSE lower than 5m in all study sites.
Fault Detection Performance Analysis of GNSS Integrity RAIM
Kim, Ji Hye ; Park, Kwan Dong ; Kim, Du Sik ;
Journal of Korean Society for Geospatial Information System, volume 20, issue 3, 2012, Pages 49~56
DOI : 10.7319/kogsis.2012.20.3.049
Performance analysis on RAIM, which is one of the techniques for monitoring integrity to ensure the reliability of GPS, was conducted in this study. RAIM is such a method which allows its user to monitor integrity in the stand-alone mode. Among the existing RAIM procedures, the representative methods including the RCM (Range Comparison Method), LSRM (Least Square Residual Method), Parity approach and WRAIM (Weighted RAIM) were evaluated, and their performance was analyzed. To validate the performance of the implemented algorithms, fault detection was tried on the clock malfunctioning event of PRN 23 occurred on January 1st, 2004. As a result, it was identified that the LSRM and the WRAIM detected all the faults happened in the event. In the case of RCM, all the states of fault were detected except for the error which occurred as a false alarm at one epoch. Furthermore, simulated biases were added for each satellite to analyze the sensitivity of each algorithm. Consequently, when biases of the 9-13 meters range were simulated for the RCM and LSRM algorithm, all the malfunctions were detected. For the WRAIM method, it could detect range biases greater than 15 meters.
Geographically Weighted Regression on the Environmental-Ecological Factors of Human Longevity
Choi, Don Jeong ; Suh, Yong Cheol ;
Journal of Korean Society for Geospatial Information System, volume 20, issue 3, 2012, Pages 57~63
DOI : 10.7319/kogsis.2012.20.3.057
The ordinary least square (OLS) regression model is assumed that the relationship between distribution of longevity population and environmental factors to be identical. Therefore, the OLS regression analysis can't explain sufficiently the spatial characteristics of longevity phenomenon and related variables. The geographically weighted regression (GWR) model can be representing the spatial relationship of adjacent area using geographically weighted function. It also characterized which can locally explain the spatial variation of distribution of longevity population by environmental characteristics. From this point of view, this study was performed the comparative analysis between OLS and GWR model for ecological factors of longevity existing studies. In the results, GWR model has higher corresponded to model than OLS model and can be accounting for spatial variability about effect of specific environmental variables.
An Analysis of Land Cover Classification Methods Using IKONOS Satellite Image
Kang, Nam Yi ; Pak, Jung Gi ; Cho, Gi Sung ; Yeu, Yeon ;
Journal of Korean Society for Geospatial Information System, volume 20, issue 3, 2012, Pages 65~71
DOI : 10.7319/kogsis.2012.20.3.065
Recently the high-resolution satellite images are helpfully using the land cover, status data for the natural resources or environment management. The effective satellite analysis process for these satellite images that require high investment can be increase the effectiveness has become increasingly important. In this Study, the statistical value of the training data is calculated and analyzed during the preprocessing. Also, that is explained about the maximum likelihood classification of traditional classification method, artificial neural network (ANN) classification method and Support Vector Machines(SVM) classification method and then the IKONOS high-resolution satellite imagery was produced the land cover map using each classification method. Each result data had to analyze the accuracy through the error matrix. The results of this study prove that SVM classification method can be good alternative of the total accuracy of about 86% than other classification method.
An Evaluation Scheme on Feasibility in Public Sector for 3D Geo-Spatial Information - Focusing on Production of Digital Mapping
Joo, Yong Jin ; Kim, Kang Soo ; Hahm, Chang Hahk ;
Journal of Korean Society for Geospatial Information System, volume 20, issue 3, 2012, Pages 73~82
DOI : 10.7319/kogsis.2012.20.3.073
In order to carry out efficient investment and successful business in national geo-spatial industry, economic assessment on the field of 3D geo-information has recently emerged as a serious issue. Therefore, this study is intended to offer cost-effective evaluation scheme which are proper for 3D geo-spatial information, especially focusing on development of orthophoto and DEM. The study is organized as follows. The first section clarifies preliminary rules for feasibility by defining target work and category in order to estimate benefit. Then, this paper will be limited to consideration of production of digital mapping for target business which is expected to create high value and its benefit from cost reduction is suggested. Drawing from the AHP(Analytic Hierarchy Process) methods, this study comprehensively described final result and implication to examine business value. Consequently, this study can suggest economical evaluation methods on 3D geo-spatial information industry, which takes up a considerable part of immaterial benefit and has difficulties in economic assessment and estimation. preventing a variety of errors in system operation in advance.
A Study on Standardization for Civil-BIM Construction of Harbor Structure based on Geo-Spatial Information Technique
Min, Byung Keun ; Park, Dong Hyun ; Jang, Yong Gu ; Kang, In Joon ;
Journal of Korean Society for Geospatial Information System, volume 20, issue 3, 2012, Pages 83~90
DOI : 10.7319/kogsis.2012.20.3.083
In this study, and taking into consideration of previous studies a trend of BIM was noticed, related to BIM software analysis and problems. Also, Geo-spatial information technology presented layered standard direction for BIM built harbor structures. Thoughts of this study, existing of two-dimensions and BIM problems based on architecture needs for applications were identified. Also, harbor structures targeting civil-BIM layer of technology-based GIS projects, and Busan International Ferry Terminal to target existing BIM comparison with harbors in the field based on GIS civil engineering-BIM standardization and direction of application could be presented.
Suitability Assessment for Flood Disaster Shelters of Jinju City
Yoo, Hwan Hee ; Son, Se Ryeon ;
Journal of Korean Society for Geospatial Information System, volume 20, issue 3, 2012, Pages 91~99
DOI : 10.7319/kogsis.2012.20.3.091
Jinju city is operating by selecting 8 places as the flood inundation risk area and by designating shelters on this area targeting districts damaged by typhoon and heavy rain, in the past. This study selected the research area as Nabul district and Sangpyeong district where are located in the town and that has high population density out of districts with inundation risk. The network analysis of GIS was applied to the suitability assessment on location of shelter by calculating the moving speed and the arriving time after dividing it into children, general adults, and aged people in consideration of the evacuation condition in inundation disaster. As a result, it was indicated that optimal evacuation plan time for children and aged people exceeded in getting to the shelter because of evacuation time excess and that even general adults outrun the prescribed evacuation time in some districts. Accordingly, a problem for evacuation time was improved by additionally designating 1-2 shelters to existing shelters in Nabul and Sangpyeong districts. A countermeasure is needed to reduce life and property damage in disaster occurrence by implementing the evacuation warning and the age-based evacuation plan more specifically in the future.
Generation for Attribution Information of Digital Map using Space Matching
Moon, Yong Hyun ; Kim, Myoung Suk ; Jo, Eui Hwan ; Choi, Seok Keun ;
Journal of Korean Society for Geospatial Information System, volume 20, issue 3, 2012, Pages 101~108
DOI : 10.7319/kogsis.2012.20.3.101
The construction of data connection is required due to the digital map do not have the new address data which is implemented by the Korea government and it cannot use between government and other agency. The manually matching of digital map and new address data is time and money consuming process due to the huge amount of data. In this research, new system is developed for data generation of attribute data by the data connection method of digital map and new address data using spatial matching and matching rate of data connection is analyses. The results of data matching rate in the research area are 84% in building case and 67% in road case in 1:1000 digital map at Suwon and 18% in building case and 21% in road at Seogwipo.
Effects of Wireless Controlled In-Pavement Flashing Light System at Pedestrian Crosswalk
Jin, Heui Chae ; Lee, Jong Ho ; Choi, Seok Geun ;
Journal of Korean Society for Geospatial Information System, volume 20, issue 3, 2012, Pages 109~115
DOI : 10.7319/kogsis.2012.20.3.109
Pedestrian safety is becoming a major priority on the nation's roadway policy. Numerous strategies have been experimented with nationwide in an attempt to reduce the accidents of pedestrian-vehicle crashes, especially in pedestrian crosswalk. We suggest the wireless controlled in-pavement flashing light system to reduce the accident at pedestrian crosswalk. We have recommended the use of wireless controlled systems as a tool to manage the In-pavement flashing light system that have retain high visibility goals for pedestrian preserving or enhancing pedestrian safety. Then we have compared this system with any other legacy systems in respect of cost and effects.