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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 16, Issue 4 - Dec 2013
Volume 16, Issue 3 - Sep 2013
Volume 16, Issue 2 - Jun 2013
Volume 16, Issue 1 - Mar 2013
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Analysis of Flood Inundation Using LiDAR and LISFLOOD Model
Choi, Cheon-Kyu ; Choi, Yun-Seok ; Kim, Kyung-Tak ;
Journal of the Korean Association of Geographic Information Studies, volume 16, issue 4, 2013, Pages 1~15
DOI : 10.11108/kagis.2013.16.4.001
Great loss of life and property has been occurred by the severe flood globally. In Korea, a flood inundation map is used as one of the non-structural measures for reducing flood damage, and various inundation models have been studied for flood inundation analysis. This study applies LiDAR data and LISFLOOD model for flood inundation analysis and discusses the the modeling results from levee breaching scenarios for evaluating the applicability of the model to stream inundation modeling. In the results of LISFLOOD modeling, maximum inundation area was similar to the inundation map by HEC-RAS model just less than 4%. The inundation area by each levee breaching scenario showed the difference from 0.2% to 6.5%. Inundation processes were different each other according to the position of levee breach point, and maximum inundation area and depth were changed by the flow direction of stream and flood plain. This study shows that LISFLOOD model can be applied properly to stream inundation analysis using various inundation scenarios.
An Adequate Band Selection for Vegetation Index of CASI-1500 Airborne Hyperspectral Imagery Using Image Differencing and Spectral Derivative
Kim, Tae-Woo ; We, Gwang-Jae ; Suh, Yong-Cheol ;
Journal of the Korean Association of Geographic Information Studies, volume 16, issue 4, 2013, Pages 16~28
DOI : 10.11108/kagis.2013.16.4.016
Recently the various applications and spectral indices development of airborne hyperspectral imagery(A-HSI) has been increased. Especially the vegetation indices (VIs) were used to verify stress and vigor of vegetation. The VIs needs two or more spectral bands selectively to calculate as NIR(near infrared) and red wavelength. The A-HIS has specific band characteristics as narrow, continues and many. The A-HIS has narrow, continues and many specific band characteristics. That could be make it confuse which of bands could be explained for appropriate vegetation characteristics. If the A-HIS bands is not the same the wavelength with VIs` development band setting, then it need a selection adequate for spectral characteristics of target vegetation. Therefore we set 4 substitute bands for NIR and red wavelength respectively and calculated two VIs combined with substitute bands such as NDVI(normalized difference vegetation index) and MSRI(modified simple ratio index). To consider the variation of each VIs, we adapted the image differencing method of change detection technique. Also, we used spectral derivative to identify appropriate bands for spectral characteristics of digital forest cover type map. The result of adequate bands for two VIs selected red #3 as 680.2nm and NIR #2 as 801.7nm. This wavelength was good for any forest type in low variations.
A Study on Changes of the Spatio-Temporal Distribution of Temperature in Korea Peninsular During the Past 40 Years
Kim, Nam-Shin ; Kim, Gyung-Soon ;
Journal of the Korean Association of Geographic Information Studies, volume 16, issue 4, 2013, Pages 29~38
DOI : 10.11108/kagis.2013.16.4.029
This study is to construe the spatio-temporal characteristics of temperature in cities and the changes of climatical regions by analyzing a climate change in Korea peninsular. We used daily mean air temperature data which were collected in South and North climate stations for the past 34 years from 1974 to 2007. We created temperature maps of 500m resolution with Inverse Distance Weight in application with adiabatic lapse rate per month in linear relation with height and temperature. In the urbanization area, the data analyzed population in comparison with temperature changes by the year. The south climate region in Korea by the Warmth index was expanded to the middle climate region by the latitude after 1990s. A rise of mean temperature was
in urban areas such as Seoul, metropolitan and cities which had a rapid urbanization and industrialization with the population increase between 1980s and 1990s. In case of North Korea, cities such as Pyeongyang, Anju, Gaecheon, and Hesan had the same pattern.
A Study of the Diagnosis of Downtown Deterioration in Busan
Kwon, Il-Hwa ; Nam, Kwang-Woo ;
Journal of the Korean Association of Geographic Information Studies, volume 16, issue 4, 2013, Pages 39~53
DOI : 10.11108/kagis.2013.16.4.039
Although the efficient formation of urban space structure is a key factor in energy saving and environmentally-friendly aspect, the maintenance of the center and sub-center of the city that are key factors has been becoming increasingly difficult due to the variability and complexity of urban activities. In the case of Busan, amid the expansion of urban scale due to rapid economic development and overpopulation, systematic approaches to professional diagnosis and maintenance have been significantly insufficient - other than the city basic plan which has been conducted at an interval of 20 years. For the effective management of urban central area, systematic monitoring of the CBD through demand forecast and blight forecast at a city level must first be implemented. In order to fulfill this goal, this study is to figure out the current state of the CBD through the diagnosis on blight of the urban central area in the viewpoint of rehabilitation of the CBD and to propose the measures for practical utilization of the information about space for the further management of the central area of the city. For analysis, the study looks into the present state in terms of physical index, economic index, and social index. And then as a micro-approach by utilizing economic index, the study has thoroughly examined the economic blight of the Seomyun urban central area of Busan. The outcome of the analysis shows that in terms of population distribution and land utilization the area is in the stage of inefficient dispersion after having gone through the stage of suburbanization. It is expected that this study, as the material that proves the necessity of enhancing the function of the CBD, can propose the direction for the management of the urban center of Busan through blight prediction and management of the urban center and can provide the basic data for the long-term urban development that aims at the efficient strengthening of functions of the CBD.
An Evaluation of the Accuracy of the Vertical Positioning by Distance Using Network RTK-GPS
Mun, Du-Yeoul ; Lee, Sung-Su ; Kim, Myeong-Soo ; Shin, Sang-Ho ; Baek, Tae-Kyung ;
Journal of the Korean Association of Geographic Information Studies, volume 16, issue 4, 2013, Pages 54~63
DOI : 10.11108/kagis.2013.16.4.054
In this paper, we evaluate the accuracy of the vertical positioning by distance using Network RTK-GPS. The experimental results confirm that Network RTK-GPS method can acquire data quickly and accurately than conventional leveling methods so that the Network RTK-GPS method is a relatively efficient and economical way for the vertical positioning. Results of validation using permanent GPS stations indicate that visible satellites, PDOP, and VDOP are very good for the vertical positioning. Integrated reference points such as U0997 and U0921 are satisfied with 3 ratings in the rules of public leveling and all the rest are proved improper. When the vertical positioning using Network RTK-GPS is implemented, the geoid height of EGM2008 should be applied for leveling. If the number of geodetic satellite are increasing in the near future, the vertical positioning using Network RTK-GPS can be possible in all the range.
Optimal Size Determination of Flood Mitigation Facilities in a Watershed Using Geo-Spatial Information System and Economic Analysis: Focused on Dam Height Raise Project
Choi, Cheon-Kyu ; Kim, Gil-Ho ; Yeo, Kyu-Dong ; Shim, Myung-Pil ; Choi, Yun-Seok ;
Journal of the Korean Association of Geographic Information Studies, volume 16, issue 4, 2013, Pages 64~78
DOI : 10.11108/kagis.2013.16.4.064
To achieve economic efficiency in a basin flood mitigation planning, it is important to determine optimal sizes of investment alternatives. Investment alternative means decision proposals composed with one more individual proposals, and it is not easy to determine an optimal one because there are so many individual proposals. This study aims to propose the approach of determining the optimal project size for raising dam height. This study applies two scenarios to determine investment alternatives for the 4 dams in the Yeongsan River basin. `Scenario1` calculates flood mitigation for each individual proposal. And `Scenario2` calculates that for each investment alternative composed with one more individual proposals. As the results, `Scenario2` is better than `Scenario1` for selecting a economically optimal dam height considering watershed conditions comprehensively.
Causes of the Difference of Inhabited Altitudes above Sea Level of Fairy Pitta(Pitta nympha) on Jeju Island Followed by Forest Landscape Through the Comparison of Landsat Images and the Literature Review
Kim, Eun-Mi ; Kwon, Jin-O ; Kang, Chang-Wan ; Chun, Jung-Hwa ;
Journal of the Korean Association of Geographic Information Studies, volume 16, issue 4, 2013, Pages 79~90
DOI : 10.11108/kagis.2013.16.4.079
The altitude range of habitats in which Fairy Pitta inhabited in 1960s is different from the present in Jeju Island. We studied on the habitat environment to understand the causes of difference through the comparison of satellite image data(Landsat) between 1975 and 2002, the literature review in relation to habitats, vegetations, and forest landscapes. The area of below 600m asl.(above sea level) where is mainly Fairy Pitta inhabited at the present with a lot of forests, was massive pasture with small isolated forests nearby valley. The forests were broad-leaved evergreen forests, and second forests with poor condition in the size and forest structure. The forests around 700m asl. were also second forests with approximately 3m height trees. The forests from 800m to 1300m asl. were also disturbed by mushroom cultivation by local people. The authors believe that Fairy Pitta could not inhabited in the area above 1300m because of the poor forest conditions in the size and structure in which consist of Ilex crenata, Rhododendron mucronulatum var. ciliatum and coppice forests. Therefore it might be possible that the best forests for the Fairy Pitta habitat were located in the area of 1,000m to 1,300m above sea level in 1960s. Compared to present habitats, forests at 100m up to 800m above sea level, the authors believe that the size of habitats were smaller with less population of Fairy Pitta. Since 1960s the forest landscape of Jeju Island has been improved successfully, and because of that the population of Fairy Pitta also has been increased. To protect the Fairy Pitta and habitats in Jeju Island, it is suggested that sustainable forest management focusing on the species composition and stand structure maintain or enhance the biodiversity.
Assessment of Wave Power Potential in the Kangwon and Dongnam Regions, Korea
Jang, Mi-Hyang ; Choi, Yo-Soon ;
Journal of the Korean Association of Geographic Information Studies, volume 16, issue 4, 2013, Pages 91~105
DOI : 10.11108/kagis.2013.16.4.091
This study performed an assessment of wave power potential in the Kangwon and Dongnam regions encompassing the East Sea and part of South Sea. Annual electricity production and economic effects of 28 wave energy converters with 750kW capacity were analyzed using significant wave height and peak wave period data(created from the NOAA`s NWW3 model) and InVEST software(developed by Stanford University and University of Minnesota). Annual electricity production was estimated to be up to 1,207MWh/year and at least 163MWh/year. The spatial pattern of annual electricity production showed that the sea far from land has higher wave power potential than the sea near coast. The net present value(NPV) of 28 wave energy converters was calculated by considering an operation period of 25 years. When assuming that the electricity produced from wave energy converters is transferred to onshore power plants through underwater cables, the NPV was estimated to be up to 5,883USD(6,600,000KRW) and at least -63,494USD(-71,000,000KRW). In contrast, the NPV increased up to 28,095 USD(31,600,000KRW) when assuming that the electricity is utilized in the Ulleungdo and Dokdo. In addition, it was found that the break-even line of NPV in the East Sea becomes closer towards the land according to the increment of electricity price. The NPV of wave energy converters near the Ulleungdo and Dokdo will be 88,158 USD(99,000,000KRW) if the increment of electricity price is 100KRW.
Questionnaire Analysis of Geo-Spatial Open Source Application
Yoo, Hee-Young ; Lee, Ki-Won ; Lee, Kwang-Jae ; Kim, Yong-Seung ;
Journal of the Korean Association of Geographic Information Studies, volume 16, issue 4, 2013, Pages 106~119
DOI : 10.11108/kagis.2013.16.4.106
As open source can reduce costs and apply to various fields rapidly, many countries have actively adopted open source. However, geo-spatial open source in Korea is not actively promoted yet comparing to other countries having similar infra environments. In this study, we analyzed the perception of geo-spatial open source, utilization status, the development possibility and future direction using questionnaire survey completed by experts dealing with spatial information. The survey result shows that many experts have experiences of using geo-spatial open source but they got a lack of understanding about open source license or regulations and only a few people got professional training. Insufficient references, the difficulty of maintenance, lack of support and low technical reliability have hindered the adoption of geo-spatial open source. Only some part of geo-spatial open source software or libraries in some field have been used in the country. However, many researchers rate highly development potential and plan to use geo-spatial open source soon. If user`s convenience, reference materials, technical trust and policy support are improved, open source field for spatial information will be developed greatly in the future.
A Study of Red Tide(HABs) in the Annals of the Joseon Daynasty
Min, Seung-Hwan ; Suh, Young-Sang ; Park, Jong-Woo ; Hwang, Jae-Dong ;
Journal of the Korean Association of Geographic Information Studies, volume 16, issue 4, 2013, Pages 120~140
DOI : 10.11108/kagis.2013.16.4.120
We investigated the occurrence of red tide, harmful algal blooms(HABs), at the end of 14th century until the beginning of 19th century recorded in the Annals of the Joseon Dynasty, which are the authentic and encyclopedic annual records of the Joseon Dynasty of Korea. In total, 81 cases of HABs are recorded in the annals for which authors draw a table and maps. The number of HABs occurrence at each sea is as follows: 68 times at the South Sea; 50 times at the East Sea; and 23 times at the Yellow Sea. A region hit by red tide most frequently was Gyeongsang-do Province (over 80 times), which borders on both the South Sea and the East Sea. HABs written in the annals follow two distinctive occurrence patterns. The first pattern shows red tide started at Gangwon-do Province in March, spread north to Hamgyeongnam-do Province in April, and moved further north to Hamgyeongbuk-do Province in May and June. On the other hand, the second pattern shows red tide occurred in Gyeongsangnam-do Province in August and then expanded north to Gyeongsangbuk-do Province in September. HABs generally happened from March to September, culminating in August. Paralytic shellfish poisoning incidents involving human deaths were reported in Jinhae, Geoje and Tongyeong, occurring February to June. Fish mortality increased throughout Gyeongsang-do Province from July to September. HABs occurred on an extensive scale from 1394 to 1451 and again from 1654 to 1706. HABs also occurred on a lesser scale from 1493 to 1534 and again from 1588 to 1609. In general, vast HABs occurred in odd years (1399, 1403, 1413 and 1681).
Testing Implementation of Remote Sensing Image Analysis Processing Service on OpenStack of Open Source Cloud Platform
Kang, Sang-Goo ; Lee, Ki-Won ;
Journal of the Korean Association of Geographic Information Studies, volume 16, issue 4, 2013, Pages 141~152
DOI : 10.11108/kagis.2013.16.4.141
The applications and concerned technologies of cloud computing services, one of major trends in the information communication technology, are widely progressing and advancing. OpenStack, one of open source cloud computing platforms, is comprised of several service components; using these, it can be possible to build public or private cloud computing service for a given target application. In this study, a remote sensing image analysis processing service on cloud computing environment has designed and implemented as an operational test application in the private cloud computing environment based on OpenStack. The implemented service is divided into instance server, web service, and mobile app. A instance server provides remote sensing image processing and database functions, and the web service works for storage and management of remote sensing image from user sides. The mobile app provides functions for remote sensing images visualization and some requests.
An Evaluation of Thermal Comfort on Urban Neighborhood Park for Improving Thermal Environment
Lim, Eun-Na ; Lee, Woo-Sung ; Choi, Chul-Hyun ; Song, Bong-Geun ; Jung, Sung-Gwan ;
Journal of the Korean Association of Geographic Information Studies, volume 16, issue 4, 2013, Pages 153~170
DOI : 10.11108/kagis.2013.16.4.153
This study was conducted to analyze the thermal comfort in the urban neighborhood park and to obtain a plan for improvement of the thermal environment. First, in the result of the analysis of the distribution characteristics of the park`s main thermal environment factors and differences among types of space, temperature, relative humidity, and wind speed did not show a clear difference spatially. However, the median radiant temperature showed great differences according to the openness of the space and the covering material. According to the evaluation of thermal comfort by types of space based on derived thermal environmental factors, the PMV value of the square was the highest at 4.39, the paths showed 2.58, greenery 1.90, and resting spaces 0.42. In the result of the PMV regression model established for the evaluation of the significance of these thermal environment factors that decide thermal comfort, it showed that the relative significance to the PMV was as follows in decreasing order: median radiant temperature(1.084), wind speed(-0.280), temperature(0.013), and relative humidity(-0.009). When conducting a scenario analysis on the areas with need for improvement in thermal environment, it was found that through reflectivity, color and the change in the physical properties of packing materials the thermal comfort felt by the body could be improved, and it is believed that through this the improvement plan can be established.
Analysis of Land Use Change within Four Major River Areas Using High-Resolution Air-Photographs: The Case of the Nakdong River Basin
Park, Soo-Kuk ; Kim, Jin ; Lee, Kil-Jae ; Jo, Myung-Hee ;
Journal of the Korean Association of Geographic Information Studies, volume 16, issue 4, 2013, Pages 171~188
DOI : 10.11108/kagis.2013.16.4.171
Landuse changes and cadastral information error categories in the four major river areas were analyzed for the use of policy data as cadastral re-arrangement of national and public lands would be required, using high-resolution air-photographs and cadastral maps before and after the river development. The study sites were the river areas of 40km around four dams of the Nakdong river where their landuses were changed most. As the results, national and public lands reached 79.9% of land parcels and 93.3% of land areas of the study sites similar with those of the four river areas, 84.3% of land parcels and 85.5% of land areas. The landuse classification of the study sites before the four river development was consisted most of `river`(71.6%) and `rice field`(12.3%), but after the development the `river` was reduced to 42.7% and `park area`(19.6%) including sport fields and `mixed lots`(20.8%) were increased. Also, 86.7% of land parcels before the development could be reduced after the development if administrative districts and land ownerships were not considered. Cadastral information error categories can be found as cadastral polygon missing, polygon overlap, location and boundary non-coincidence, small polygon generation, and non-coincidence between cadastral boundary and river boundary. Landuse change monitoring method using air-photographs will be useful to analyze landuse state through fast information aquisition and to manage properties of national and public lands such as river areas.
Building a GIS Database for Analyzing the Integrated Information on Aquatic Ecosystem Health and Its Application
Jo, Myung-Hee ; Lee, Su-Hyung ; Choi, Hee-Lak ; Jang, Sung-Hyun ;
Journal of the Korean Association of Geographic Information Studies, volume 16, issue 4, 2013, Pages 189~203
DOI : 10.11108/kagis.2013.16.4.189
The purpose of this study is to build a GIS database that can utilized to provide a multi-dimensional analysis of aquatic health ecosystem. Especially, it was to build a GIS database for comprehensive analysis using the aquatic ecosystem health. So we collected data on aquatic ecosystem health assessment, Korea Reach File(KRF), Stream Naturalness and Water Environmental Information System, and detailed analysis of the collected data was performed. In addition, the core objects were extracted from individual data and a related entity was derived by pulling out the items associated with thematic characteristics and classifying them. The establishment of GIS database makes it possible to support the decision making for the user to quickly understand the information of water environment. Therefore, the database will provide the information for the effective management on water environment.