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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 15, Issue 4 - Dec 2012
Volume 15, Issue 3 - Sep 2012
Volume 15, Issue 2 - Jun 2012
Volume 15, Issue 1 - Mar 2012
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Modeling of Petri-Net for an Simulation of Cut Slope Test on GIS
Lee, Hong-Ro ; Lee, Jae-Bong ;
Journal of the Korean Association of Geographic Information Studies, volume 15, issue 2, 2012, Pages 1~11
DOI : 10.11108/kagis.2012.15.2.001
Due to a heavy rain resulted from the global environmental change, collapse accidents happen annually and it is a tendency to increase the loss of life and economy. Thus, measures for the collapse of slope are required. If the slope can be simulated before cutting, the collapse can be predicted, and also the accident of the collapse can be minimized at the cost of recovery. This paper presents a simulation method of a slope which is important in cutting. The method is modeling and designing using Petri-Net and is implemented in the Windows XP using Arc GIS. Therefore, by means of cutting and reclamation based on GIS, this paper can contribute to saving a lot of time and money.
A Study on the Distributional Characteristics and the Actual Use Condition of Public Open Spaces
KIM, Gyeong-Su ;
Journal of the Korean Association of Geographic Information Studies, volume 15, issue 2, 2012, Pages 12~22
DOI : 10.11108/kagis.2012.15.2.012
The aim of this study is to investigate the present use condition of 145 public open spaces which have not been executed in the Busan Metropolitan City Area. The unexcused public open spaces are analyzed by the zoning, size, shape type and the development planning. First, in terms of the distribution rate by zoning, it is found that the majority of unexecuted public open spaces are located in residential area, especially in the third general residential area. Second, the most shape types are linear forms and the next are indeterminate form and fixed types. Lastly, just a few of the unexecuted public open spaces have the development plan and those are mostly to create a small park or rest area.
Effect of Urban Planning on Spatial Equity - An Analysis on the Accessibility Change to Urban Cultural Facilities by Income Class Factor in the Daejeon Metropolitan City Using GIS -
Leem, Youn-Taik ; Seo, Chang-Woo ; Lee, Sang-Ho ;
Journal of the Korean Association of Geographic Information Studies, volume 15, issue 2, 2012, Pages 23~34
DOI : 10.11108/kagis.2012.15.2.023
As the quality of life grows, the role of cultural facilities in urban areas is becoming more important. However, due to various reasons, the location of these facilities shows the geographical imbalance between urban regions. Even though provision of road network can improve this kind of urban problem, in many countries, the provision of urban infrastructure plays a role which is magnifies the cultural gap between regions and socio-economic classes. The findings of this study are as follows. First of all, the inequality of accessibility to cultural facilities is shown over the period. Cross-sectional data shows that the higher the income of a region, the higher the accessibility index(AI) of the zone to cultural facilities at any time. Next, the provision of road network contributes the improvement of AI of high income region. Finally the provision of new facilities has a tendency that these kind of facilities are located to make AI of high income zone better. It means that the decision making by city government intensifies the geographical inequality. This result would be very useful in the decision making process for determining the number and the location of cultural facilities and other similar urban infrastructure as well. Also it will be helpful for the selection of optimal location which considered not only physical distances but also social equalities.
Land Value Analysis Using Space Syntax and GWR
Kim, Hye-Young ; Jun, Chul-Min ;
Journal of the Korean Association of Geographic Information Studies, volume 15, issue 2, 2012, Pages 35~45
DOI : 10.11108/kagis.2012.15.2.035
Existing studies on land values tend to show the use of simple euclidean distances as the accessibility variable and OLS as the analysis method. However, applying such euclidean distance-based accessibility to dense CBD areas has limitations in the incorporating the characteristics of network structure whereas using OLS, the typical method for non-spatial data, tends to exclude spatial effects of spatial data. In this study, we analyzed land values focusing on the revised accessibility variables and the analytical technique that can include spatial effects. First, we adopted space syntax theory in order to consider not simple shortest distances along the streets but distances based on street network structure. Second, we compared OLS with GWR that includes spatial effects. Third, we used different size grid-cells for the spatial units considering MAUP theory and applied them to Gangnam-gu area. Each cell was analyzed for overall influence of independent variables using OLS, and coefficients were presented by GWR which enables local analysis and visualization. As a result, we found that suggested accessibility variables have a meaningful effects for land value analyses, and we were able to verify that GWR produces improved results compared to OLS. Also, we observed that the resulting values vary depending on the sizes of spatial units.
Improvement of Class Reuse at Sensor Network System Based on TinyOS Using CATL Model and Facade Pattern
Baek, Jeong-Ho ; Lee, Hong-Ro ;
Journal of the Korean Association of Geographic Information Studies, volume 15, issue 2, 2012, Pages 46~56
DOI : 10.11108/kagis.2012.15.2.046
Recently, when software architecture is designed, the efficiency of reusability is emphasized. The reusability of the design can raise the quality of GIS software, and reduce the cost of maintenance. Because the object oriented GoF design pattern provides the class hierarchy that can represent repetitively, the importance is emphasized more. This method that designs the GIS software can be applied from various application systems. A multiple distributed sensor network system is composed of the complex structure that each node of the sensor network nodes has different functions and sensor nodes and server are designed by the combination of many classes. Furthermore, this sensor network system may be changed into more complex systems according to a particular purpose of software designer. This paper will design the CATL model by applying Facade pattern that can enhance the efficiency of reuse according to attributes and behaviors in classes in order to implement the complicated structure of the multiple distributed sensor network system based on TinyOS. Therefore, our object oriented GIS design pattern model will be expected to utilize efficiently for design, update, or maintenance, etc. of new systems by packing up attributes and behaviors of classes at complex sensor network systems.
Landslide Hazard Mapping and Verification Using Probability Rainfall and Artificial Neural Networks
Lee, Moung-Jin ; Lee, Sa-Ro ; Jeon, Seong-Woo ;
Journal of the Korean Association of Geographic Information Studies, volume 15, issue 2, 2012, Pages 57~70
DOI : 10.11108/kagis.2012.15.2.057
The aim of this study is to analyse the landslide susceptibility and the future hazard in Inje, Korea using probability rainfalls and artificial neural network (ANN) environment based on geographic information system (GIS). Data for rainfall probability, topography, and geology were collected, processed, and compiled in a spatial database using GIS. Deokjeok-ri that had experienced 694 landslides by Typhoon Ewinia in 2006 was selected for analysis and verification. The 50% of landslide data were randomly selected to use as training data while the other 50% being used for verification. The probability of landslides for target years (1 year, 3 years, 10 years, 50 years, and 100 years) was calculated assuming that landslides are triggered by 1-day rainfall of 202 mm or 3-day cumulative rainfalls of 449 mm.
A Quantitative Analysis of Air Purification Effectiveness on Urban Forest Considering the Spatial Distribution of Pollutant Concentration
Choi, Chul-Hyun ; Lee, Woo-Sung ; Jung, Sung-Gwan ;
Journal of the Korean Association of Geographic Information Studies, volume 15, issue 2, 2012, Pages 71~85
DOI : 10.11108/kagis.2012.15.2.071
The purpose of this study is to estimate air purification effectiveness considering the improvement of its methods related atmospheric environment. The air purification effectiveness is estimated in Daegu, one out of Korean Metropolitan cities because air pollution is getting serious in a heavily urbanized area. The absorption of pollutants is calculated by considering spatial heterogeneity that was not considered previous studies and the spatial resolution of air dispersion modeling is also improved by kriging method. According to the type and distribution of urban forest, total 26 kinds of plant communities were distributed with Pinus densiflora community, Pinus densiflora-Quercus mongolica community, Pinus densiflora-Quercus acutissima community and other kinds of communities in the study area. In the results of estimating the
absorption amount for identification of the air purification effectiveness on urban forest, the annual absorption amount was total 108,155t/yr. Also, the annual absorption amounts of
were total 183.5 ton and 410.2 ton respectively. The findings from this study can confirm the differences of pollutant absorption by concentration that could not identify if spatial distribution of pollutant concentration had not been considered.
Predictive Flooded Area Susceptibility and Verification Using GIS and Frequency Ratio
Lee, Moung-Jin ; Kang, Jung-Eun ;
Journal of the Korean Association of Geographic Information Studies, volume 15, issue 2, 2012, Pages 86~102
DOI : 10.11108/kagis.2012.15.2.086
For predictive flooded area susceptibility mapping, this study applied and verified probability model and the frequency ratio using a geographic information system (GIS) and frequency raio. Flooded areas were identified in the study area of field surveys, For predictive flooded area susceptibility mapping, this study applied and verified probability model and the frequency ratio using a geographic information system (GIS) and frequency raio. Flooded areas were identified in the study area of field surveys, and maps of the topography, geology, landcover and green infrastructure were constructed for a spatial database. The factors that influence flooded areas occurrence, such as slope gradient, slope, aspect and curvature of topography and distance from darinage, were calculated from the topographic database. Lithology and distance from fault were extracted and calculated from the geology database. The frequency ratio coefficient is overlaid for flooded areas susceptibility mapping as each factor's ratings. Then the flooded areas susceptibility map was verified and compared using the existing flooded areas. As the verification results, the frequency ratio model showed 82% in prediction accuracy. The method can be used to reduce hazards associated with flooded areas and to plan land use.
Vessel Detection Using Satellite SAR Images and AIS Data
Lee, Kyung-Yup ; Hong, Sang-Hoon ; Yoon, Bo-Yeol ; Kim, Youn-Soo ;
Journal of the Korean Association of Geographic Information Studies, volume 15, issue 2, 2012, Pages 103~112
DOI : 10.11108/kagis.2012.15.2.103
We demonstrate the preliminary results of ship detection application using synthetic aperture radar (SAR) and automatic identification system (AIS) together. Multi-frequency and multi-temporal SAR images such as TerraSAR-X and Cosmo-SkyMed (X-band), and Radarsat-2 (C-band) are acquired over the West Sea in South Korea. In order to compare with SAR data, we also collected an AIS data. The SAR data are pre-processed considering by the characteristics of scattering mechanism as for sea surface. We proposed the "Adaptive Threshold Algorithm" for classification ship efficiently. The analyses using the combination of the SAR and AIS data with time series will be very useful to ship detection or tracing of the ship.
Evaluating the Land Surface Characterization of High-Resolution Middle-Infrared Data for Day and Night Time
Baek, Seung-Gyun ; Jang, Dong-Ho ;
Journal of the Korean Association of Geographic Information Studies, volume 15, issue 2, 2012, Pages 113~125
DOI : 10.11108/kagis.2012.15.2.113
This research is aimed at evaluating the land surface characterization of KOMPSAT-3A middle infrared (MIR) data. Airborne Hyperspectral Scanner (AHS) data, which has MIR bands with high spatial resolution, were used to assess land surface temperature (LST) retrieval and classification accuracy of MIR bands. Firstly, LST values for daytime and nighttime, which were calculated with AHS thermal infrared (TIR) bands, were compared to digital number of AHS MIR bands. The determination coefficient of AHS band 68 (center wavelength
) was over 0.74, and was higher than other MIR bands. Secondly, The land cover maps were generated by unsupervised classification methods using the AHS MIR bands. Each class of land cover maps for daytime, such as water, trees, green grass, roads, roofs, was distinguished well. But some classes of land cover maps for nighttime, such as trees versus green grass, roads versus roofs, were not separated. The image classification using the difference images between daytime AHS MIR bands and nighttime AHS MIR bands were conducted to enhance the discrimination ability of land surface for AHS MIR imagery. The classification accuracy of the land cover map for zone 1 and zone 2 was 67.5%, 64.3%, respectively. It was improved by 10% compared to land cover map of daytime AHS MIR bands and night AHS MIR bands. Consequently, new algorithm based on land surface characteristics is required for temperature retrieval of high resolution MIR imagery, and the difference images between daytime and nighttime was considered to enhance the ability of land surface characterization using high resolution MIR data.
Evaluating the Imbalance of Green Space and Establishing its Management Zone Using Spatial Analysis - Focused on the Use of Green Space -
Lee, Woo-Sung ; Jung, Sung-Gwan ;
Journal of the Korean Association of Geographic Information Studies, volume 15, issue 2, 2012, Pages 126~138
DOI : 10.11108/kagis.2012.15.2.126
The purpose of this study is to evaluate the imbalance of green space using various spatial analysis methods and to establish the management zone for green space with service supply in the aspect of its use in Daegu. The total green space of Daegu is 48,936.1ha which is the second among 7 metropolitan cities of Korea. According to the imbalance analysis of green space, the Gini's coefficient based on the area was not high, on the other hand, the Gini's coefficient based on the population was high by above 0.6. According to an evaluation of service supply of green space in Dalseo-gu, the area within about 100m around large green space was supplied with green spaces of above
/pop. On the other hand, the area such as Sangin, Jukjeon, and Yongsan was not almost supplied with green space. Finally, 'Rich zone', 'Fair zone', 'Poor zone', and Broken zone' could be established based on the service supply for the management direction of green space. The findings from this study can be used as the basic data for selecting the construction priority of new green spaces.
Development of Smart Phone Application for Information Collection of Traffic Congestion Section Caused by Heavy Rain
Chun, Young-Hak ; Kwon, Won-Seok ; Kim, Chang-Soo ;
Journal of the Korean Association of Geographic Information Studies, volume 15, issue 2, 2012, Pages 139~149
DOI : 10.11108/kagis.2012.15.2.139
Flooding caused by torrential rains and landslide causes the deaths of people and property damage as well as traffic congestion and isolation. Driver enters the dangerous area when driver doesn't recognize disaster information on the road and the damage is spread over time. In this paper, we will develop a smart phone application to collect dangerous disaster area information and a system based on C/S to manage the data received from the smart phone application. This system can analyze dangerous disaster areas using the data received from the smart phone application and the spatial database analyzed dangerous disaster areas is displayed in the smart phone application using a map server. We think that the suggested system provides more efficient information to user.
Effects of the Physical Environment around Elementary Schools on Children's Walking Safety - A Case Study of the Elementary Schools in Changwon -
Park, Kyung-Hun ; Byeon, Ji-Hye ;
Journal of the Korean Association of Geographic Information Studies, volume 15, issue 2, 2012, Pages 150~160
DOI : 10.11108/kagis.2012.15.2.150
The purpose of this study is to examine the relationship between children's walking safety or risk of traffic accident and the physical environments around 20 public elementary schools in Changwon-si, Gyeongsangnam-do. Field surveys were conducted to assess the street-level objective and subjective walking environments. The GIS method was used for measuring the neighborhood-level land use patterns. Children's walking safety and risk of traffic accident data were collected from the 6,381 grade 5 to 6 students attending 18 elementary schools through the questionnaire survey. Correlation analysis showed that walking safety and risk of traffic accident of the elementary students were associated with the number of temporary or permanent obstacles on the sidewalk, traffic safety signs, driveway and street intersections, street lights, and percentage of detached housing area and road area on neighbourhood-level. This research will promote to help with constructing a safe routes to school and walking-friendly healthy community.