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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Association of Geographic Information Studies
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The Korean Association of Geographic Information Studies
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Volume & Issues
Volume 17, Issue 4 - Dec 2014
Volume 17, Issue 3 - Sep 2014
Volume 17, Issue 2 - Jun 2014
Volume 17, Issue 1 - Mar 2014
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Large-Scale Slope Stability Analysis Using Climate Change Scenario (2): Analysis of Application Results
Oh, Sung-Ryul ; Lee, Gi-Ha ; Choi, Byoung-Seub ; Lee, Kun-Hyuk ; Kwon, Hyun-Han ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 3, 2014, Pages 1~19
DOI : 10.11108/kagis.2014.17.3.001
This study aims to assess the slope stability variation of Jeonbuk drainage areas by RCM model outputs based on A1B climate change scenario and infinite slope stability model based on the previous research by Choi et al.(2013). For a large-scale slope stability analysis, we developed a GIS-based database regarding topographic, geologic and forestry parameters and also calculated daily maximum rainfall for the study period(1971~2100). Then, we assess slope stability variation of the 20 sub-catchments of Jeonbuk under the climate change scenario. The results show that the areal-average value of safety factor was estimated at 1.36(moderately stable) in spite of annual rainfall increase in the future. In addition, 7 sub-catchments became worse and 5 sub-catchments became better than the present period(1971~2000) in terms of safety factor in the future.
Analysis of the MODIS-Based Vegetation Phenology Using the HANTS Algorithm
Choi, Chul-Hyun ; Jung, Sung-Gwan ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 3, 2014, Pages 20~38
DOI : 10.11108/kagis.2014.17.3.020
Vegetation phenology is the most important indicator of ecosystem response to climate change. Therefore it is necessary to continuously monitor forest phenology. This paper analyzes the phenological characteristics of forests in South Korea using the MODIS vegetation index with error from clouds or other sources removed using the HANTS algorithm. After using the HANTS algorithm to reduce the noise of the satellite-based vegetation index data, we were able to confirm that phenological transition dates varied strongly with altitudinal gradients. The dates of the start of the growing season, end of the growing season and the length of the growing season were estimated to vary by +0.71day/100m, -1.33day/100m and -2.04day/100m in needleleaf forests, +1.50day/100m, -1.54day/100m and -3.04day/100m in broadleaf forests, +1.39day/100m, -2.04day/100m and -3.43day/100m in mixed forests. We found a linear pattern of variation in response to altitudinal gradients that was related to air temperature. We also found that broadleaf forests are more sensitive to temperature changes compared to needleleaf forests.
An Analysis on the Spatial Spillover Patterns of Aging Population in Rural Areas
Yeo, Chang-Hwan ; Seo, Yun-Hee ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 3, 2014, Pages 39~53
DOI : 10.11108/kagis.2014.17.3.039
The Korean population is aging rapidly and a disproportionate share of older people(aged 65 and older) lives in rural areas. The rural population is aging more rapidly than the population in urban area. However, the majority of studies on aging population focuses on an urban area rather than a rural area. Rural areas have been alienated from the priority of the national policy. For these reasons, this study is to show the level of population aging and to analyze the spatial spillover patterns of aging population in rural areas for the establishment of localized policy on population aging. The main findings of this study can be summarized as follows. First, the level of population aging varies in different localities such as socio-economic and locational characteristics. Secondly, there are distinct differences between hot spot region(clustering of high aging index) and cold spot region(clustering of low aging index) in spatio-temporal spillover patterns. This study intends to suggest an useful information to establish the area-specific policy on aging population through the results of analysis.
Estimation on Greenhouse Gases(GHGs) Emission of Large Forest Fire Area in 2013
Won, Myoung-Soo ; Kim, You-Seung ; Kim, Kyong-Ha ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 3, 2014, Pages 54~67
DOI : 10.11108/kagis.2014.17.3.054
This study was performed to estimate Greenhouse gases(GHGs) emissions from biomass burning at large forest fire(Ulju, Pohang and Bonghwa) in 2013. The extended methodology to estimate GHGs adopted the IPCC(Intergovermental Panel on Climate Change) Guidelines(2006) equation. For classifying fire damaged area and analyzing burn severity of total three large-fire area damaged, this study used post-fire imagery from Rapideye imagery to compute the Maximum Likelihood Classifiction (MLC). The result of accuracy assessment on burn severity from imagery showed that average overall accuracy was 75.93% and Kapp coefficient was 0.67 Finally, GHGs emissions from biomass burning in the three large-fire area 2013 were estimated as follows: Ulju
63,260, CO 5.207,
28,675, CO 2.359,
53,086, CO 1,655,
DAD Analysis of Yongdam Dam Watershed Using the Cell-Based Automatic Rainfall Field Tracking Methods
Song, Mi-Yeon ; Jung, Kwan-Sue ; Lee, Gi-Ha ; Kim, Yeon-Su ; Shin, Young-A ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 3, 2014, Pages 68~81
DOI : 10.11108/kagis.2014.17.3.068
This study aims to apply and evaluate the automatic DAD analysis method, which is able to establish the depth-area relationship more efficiently and accurately for point-to-areal rainfall conversion. First, the proposed automatic DAD analysis method tracks the expansion route of area from the storm center, and it is divided into Box-tracking, Point-tracking, Advanced point-tracking according to tracking method. After applying the proposed methods to 10 events occurred in Yongdam-watershed area, we confirmed that the Advanced point-tracking method makes it possible to estimate the maximum average areal rainfal(MAAR) more accurately with consideration of the storm movement and the multi-centered storm. In addition, Advanced point-tracking could reduce the errors of the estimated MAAR induced by increasing the area because it can estimate MAAR for each storm center and compare them at the same time. Finally, the DAD curve for the study area could be derived based on the DAD analysis of the selected 10 events.
Evaluation for Earthwork Slope Safety Using Terrestrial LiDAR
Kim, Hee-Gyoo ; Roh, Tae-Ho ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 3, 2014, Pages 82~92
DOI : 10.11108/kagis.2014.17.3.082
The ratio of using soil as the main material in construction is quite numerous, and it covers many parts in forms and bases of the structure. Thus, the earthwork forms many structures for social infrastructure, and the stability of these structures is most crucial when completed than under construction. This study executed a field experiment to evaluate the accuracy and utility of the slope, which is an important part in earthwork, when terrestrial LiDAR is obtained, and the results are as follow. First, as the result of the observation using Total Station and terrestrial LiDAR, the horizontal error RMSE was
, and the vertical error RMSE was
. As the result of the comparison between the errors and permissible range of public surveying regulation, it sufficiently secure the accuracy. Also, the extraction of the check section, which covers the most important part among the stability checks could be scientifically and rationally processed, and these extraction results are expected to be provided as important basic materials for the earthwork slop stability evaluation.
A Study on the Link of Building Information and Cadastral Information as Spatial Information
Kim, Chang-Hwan ; Lee, Won-Hui ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 3, 2014, Pages 93~103
DOI : 10.11108/kagis.2014.17.3.093
Regarding to the cadastral information and building information as a spatial information, studies on linking between cadastral records and building information, or integration methodology on 2D based building map and land information were proposed. Cadastral information has grown its values by cadastral resurvey project and cadastral confirmation survey. There is a tendency of BIM in the design stage which is not just simple 3D dataset and BIM is spreading in public and private sectors. However, studies on the linkage between building information and cadastral information is relatively weak comparing to the BIM spreading. One of the main features that have been improved in IFC4 is the interoperability with GIS. In this regards, the researcher propose several revision methods to link cadastral information to building information. Cadastral information needs to improve the quality of the dataset`s such as unifying the different coordinate systems and preparing continuous cadastral map. For buildings, standardization of BIM in the public and private sectors is urgent task. IFC4 and upcoming IFC5 are international standards which need to be considered and BIM reverse engineering for the existing buildings is necessary for the public utilization in the near future.
A Study on Establishment of the Levee GIS Database Using LiDAR Data and WAMIS Information
Choing, Yun-Jae ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 3, 2014, Pages 104~115
DOI : 10.11108/kagis.2014.17.3.104
A levee is defined as an man-made structure protecting the areas from temporary flooding. This paper suggests a methodology for establishing the levee GIS database using the airborne topographic LiDAR(Light Detection and Ranging) data taken in the Nakdong river basins and the WAMIS(WAter Management Information System) information. First, the National Levee Database(NLD) established by the USACE(United States Army Corps Engineers) and the levee information tables established by the WAMIS are compared and analyzed. For extracting the levee information from the LiDAR data, the DSM(Digital Surface Model) is generated from the LiDAR point clouds by using the interpolation method. Then, the slope map is generated by calculating the maximum rates of elevation difference between each pixel of the DSM and its neighboring pixels. The slope classification method is employed to extract the levee component polygons such as the levee crown polygons and the levee slope polygons from the slope map. Then, the levee information database is established by integrating the attributes extracted from the identified levee crown and slope polygons with the information provided by the WAMIS. Finally, this paper discusses the advantages and limitations of the levee GIS database established by only using the LiDAR data and suggests a future work for improving the quality of the database.
Assessment of 3-Dimensional Sunshine Environment Using Geographical Information System Data around Pukyong National University
Kim, Eun-Ryoung ; Park, Soo-Jin ; Kim, Jae-Jin ; Nam, Kyung-Yeub ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 3, 2014, Pages 116~131
DOI : 10.11108/kagis.2014.17.3.116
In this study, sunshine environment in an urban area is analyzed using a numerical model which considers sunshine-duration blocking by topography and buildings. The numerical model used in this study has an improvement in the algorithm detecting sunshine duration in the model domain. The main improvement in the algorithm is to detect sunshine duration using all the surfaces of any grid cell(the previous model uses the center of any grid cell). The improvement in the algorithm gives more accurate evaluation of sunshine duration at corner surfaces of buildings. Using the improvement model and geographic information system(GIS) data, sunshine environment is analysed at an building-congested area in Busan for a week in four seasons. The results show that sunshine duration can be much changed by apartment complexes, high-rise buildings, topography in the model domain.
A Study on the Effect of Cold Water Mass on Observed Air Temperature in Busan
Park, Myung-Hee ; Lee, Joon-Soo ; Ahn, Ji-Suk ; Suh, Young-Sang ; Han, In-Seong ; Kim, Hae-Dong ; Bae, Hun-Kyun ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 3, 2014, Pages 132~146
DOI : 10.11108/kagis.2014.17.3.132
The effects of the cold air generated from large cold water mass at the coastal area on observed air temperature in Busan were investigated using AWS(Automatic Weather Station) data at the Busan area operated by Korea Meterological Administration and SST(Sea Surface Temperature) data at the Gijang and Busan area operated by Korean National Fisheries Research Development Institute. First, the temperature difference between the coastal area and the city area was about
during cold water mass day while it was about
if cold water mass was not appeared. Second, for day time, the temperature at the coastal area was about
lower than that at the city area during cold water mass day, but the difference was only about
without cold water mass. On the other hand, for night time, the temperature at the coastal area was about
lower than that at the city area during cold water mass day and the difference was about
without cold water mass. As a result, temperature differences at night time were higher than those at day time whether or not cold water mass appeared. The reason for higher temperature at night time might be the urban heat island phenomenon.
An Empirical Study on the Correlation between TOD Planning Elements and Subway Ridership in Busan Metropolitan City
Choi, Don-Jeong ; Suh, Yong-Cheol ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 3, 2014, Pages 147~159
DOI : 10.11108/kagis.2014.17.3.147
Public transportation ridership and walkability of urban district can be enhanced through high quality of TOD(Transit Oriented Development) elements. Generally, TOD have been evaluated several physical components such as the diversity of land use pattern, accessibility of public transportation and aspects of urban design around the station area. Especially, Spatial characteristics of TOD planning elements have many potential dependent when considering the characteristics of Rail Station-Influenced Area Development which is performing around subway station. Therefore, researchers should be considering the variation of spatial properties for planning elements according the set of spatial area and their socioeconomic factors. However, existing many cases related TOD does not consider about this point. In this paper, the changes of TOD characteristics were analyzed by different spatial units surrounding subway station in Busan Metropolitan City. Multiple Regression Analysis was performed for an investigation of effective spatial unit of TOD planning elements in this area using subway ridership data. In addition, the application validity of socioeconomic variables was examined through a comparative analysis of regression results with the multiple regression that implied only physical TOD elements. As the result, the variation of spatial properties for TOD planning elements according to the set of spatial unit was found. Furthermore, the specific spatial unit to applicable TOD elements in this area was derived. And the multiple regression model which added socioeconomic variables was derived more improved estimate results than the multiple regression model that implied only physical TOD elements.
Development of a Meso-Scale Distributed Continuous Hydrologic Model and Application for Climate Change Impact Assessment to Han River Basin
Kim, Seong-Joon ; Park, Geun-Ae ; Lee, Yong-Gwan ; Ahn, So-Ra ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 3, 2014, Pages 160~174
DOI : 10.11108/kagis.2014.17.3.160
The purpose of this paper is to develop a meso-scale grid-based continuous hydrological model and apply to assess the future watershed hydrology by climate change. The model divides the watershed into rectangular cells, and the cell profile is divided into three layered flow components: a surface layer, a subsurface unsaturated layer, and a saturated layer. Soil water balance is calculated for each grid cell of the watershed, and updated daily time step. Evapotranspiration(ET) is calculated by Penman-Monteith method and the surface and subsurface flow adopts lag coefficients for multiple days contribution and recession curve slope for stream discharge. The model was calibrated and verified using 9 years(2001-2009) dam inflow data of two watersheds(Chungju Dam and Soyanggang Dam) with 1km spatial resolution. The average Nash-Sutcliffe model efficiency was 0.57 and 0.71, and the average determination coefficient was 0.65 and 0.72 respectively. For the whole Han river basin, the model was applied to assess the future climate change impact on the river bsain. Five IPCC SRES A1B scenarios of CSIRO MK3, GFDL CM2_1, CONS ECHO-G, MRI CGCM2_3_2, UKMO HADGEMI) showed the results of 7.0%~27.1 increase of runoff and the increase of evapotranspiration with both integrated and distributed model outputs.
Geographic Distribution of Periphyton Diatom Species: A Case Study of Achnanthes convergens in Nakdong River Basin
Jo, Myung-Hee ; Byun, Myeung-Sub ; Sim, Jun-Seok ; Jang, Sung-Hyun ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 3, 2014, Pages 175~194
DOI : 10.11108/kagis.2014.17.3.175
This study attempts to identify the spatial distributions of Achnanthes convergens, and elucidate the environmental factors that affect the Periphyton diatom habitat. Data in 250 points of Nakdong river basin are collected between April(primary) and September(secondary) 2012, with the National Institute of Environmental Research`s support. We define "clean area" over 10% of Achnanthes convergens appearance, and the others as "non-clean areas". Spatial statistics of Kriging, Hotspot, LISA are used in this study. Results show that 1) 56 points are identified as clean areas in the primary survey, while 41 points are discovered in the following survey; 2) using water quality variables, density of turbidity(clean
) and conductivity(clean 1.95 NTU; nonclear 5.58 NTU) are five-fold lower in clean-areas; 3) Habitat and Riparian Factors in Nakdong basin illustrate that natural sand bar, diversity of velocity, sediment condition, levee material, riverside land affect Achnanthes convergens; 4) Hotspots of Achnanthes convergens are located in watersheds, including upper Andong Dam, upper Imha dam, Wi-cheon, Miryang river, Nam river and Hwang river whereas mainstream/downstream of Nakdong river and Keumho river watershed are shown as coldspots.
A Study on the Soil Contamination(Maps) Using the Handheld XRF and GIS in Abandoned Mining Areas
Lee, Hyeon-Gyu ; Choi, Yo-Soon ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 3, 2014, Pages 195~206
DOI : 10.11108/kagis.2014.17.3.195
In this study, soil contamination maps related to Cu and Pb were created at the Busan abandoned mine in Korea using a handheld X-Ray Fluorescence(XRF) and Geographic Information Systems(GIS). Hydrological analysis was performed using the Digital Elevation Model(DEM) of the study area to identify the flow directions of surface runoff where pollutants can be dispersed from the soil contamination sources. 24 locations for measuring the soil contamination related to Cu and Pb were selected by considering the result of hydrological analysis. The results measured at the 24 locations using the handheld XRF showed that the highest value of Cu contamination is 8,255ppm and that of Pb is 2,146ppm. The field investigation data were entered into ArcGIS software, and then soil contamination maps regarding Cu and Pb with a 5m grid-spacing were created after performing spatial interpolations using the ordinary kriging method. As a result, we could know that high concentrations of Cu and Pb are presented at the waste and tailings dumps around the abandoned mine openings. This study also showed that the handheld XRF and GIS can be utilized to create soil contamination maps related to Cu and Pb in the field.