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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
Selecting the target year
Analysis on Change Characteristics of Spatial Structure Related with Urban Planning : Using Spatial Statistical Method
Seo, Kyung-Min ; Kim, Ho-Yong ; Lee, Sung-Ho ; Kwon, Tae-Ho ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 2, 2014, Pages 1~14
DOI : 10.11108/kagis.2014.17.2.001
In this study, the change characteristics of urban spatial structure in Daegu were analyzed connecting with urban planning for efficient urban management. Urban development process from 1970 to 2010 in Daegu was analyzed utilizing Getis-Ord
methodology, a spatial statistical method, and it was identified that Daegu was in the stage of disurbanization. However, as Daegu orients multi-nuclei city, it was difficult to explain the stage of urban development after disurbanization in 2000. Accordingly, to analyze detailed changes in spatial structure in multi-centric areas after 2000, population, land price and employment factor changes were analyzed using Bachi Measurement. According to analytical results, multi-centralization process has been continued in Daegu. Urban core area and Chilgok area showed spatial structure change into distribution process, Ansim area into concentration process, and Seongseo and Talseo area into concentration and distribution process. Therefore, urban planning considering the regional characteristics are needed for efficient urban management.
An Integrated Assessment of Green Environment on Urban Space
Lee, Woo-Sung ; Jung, Sung-Gwan ; Park, Kyung-Hun ; You, Ju-Han ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 2, 2014, Pages 15~31
DOI : 10.11108/kagis.2014.17.2.015
The purpose of this study is to assess the green environment on urban space and to suggest the sustainable green space planning. The study area is Dalseo-gu which has the biggest spatial imbalance of green space among 7 districts of Daegu. Three functions such as nature-ecological, environment-control, and usage function were established for assessing the green environment. For the assessment step of nature-ecological function, `green connectivity` and `animal movement` were used. Also,`thermal environment` and `temperature decrease` were utilized in terms of environment-control function and `green space`s service supply` were utilized in terms of usage function. According to the results of integrated assessment, the green rich zone(Grade I) was 44.8% of total area in Dalseo and this zone was distributed along the southern forest of Mt. Ap and Mt. Biseul and the northern forest of Mt. Gung and Mt. Waryong. On the other hand, the green broken zone(Grade IV) was located in the residential areas of Gamsam and Jukjeon and the residential and industrial areas of Wolseong 1 and Jincheon and this zone was 5.5% of total area. The findings from this study can be used as the plan criteria for construction and distribution of green space in urban master plan.
Development of an Integrated DB Management System for GIS-Based Client/Server Data Sharing in Climate and Environment Fields
Choi, Yong-Kuk ; Kim, Kye-Hyun ; Lee, Chol-Young ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 2, 2014, Pages 32~43
DOI : 10.11108/kagis.2014.17.2.032
To identify major causes of the global environment changes arising from extreme and unusual weather patterns occurring these days, and to foresee future environmental changes, it is highly important to shed light on the correlation between climate changes and global environment system. To investigate the correlation between climate changes and global environment system, it calls for establishing an integrated climate-environment DB for analyzing comparatively the data on climatic changes and global environment system. In the preceding studies, we researched an XML-based integrated climate-environment DB and developed a management system for the DB. However, the existing integrated climate-environment DB, designed and installed only for individual PCs, does not allow multiple users `simultaneous access. Accordingly, it fails to systematically update and sharing data which is being generated continuingly. Hence, this study aims to develop an easy-to-use GIS-based integrated DB management system by improving the existing integrated climate-environment DB through the adoption of the client/server model. For this, this study collected and analyzed climate and environment data prior to designing and building a DBMS-based integrated DB. In addition, in order for multidisciplinary researchers to easily get access and apply the integrated DB, this study designed and developed a GIS-based integrated DB management system using a client/server model which facilitates connections with multiple PCs. The GIS-based integrated climate-environment DB management system makes it easier to efficiently manage and locate scattered climate-environment data. It is also expected that the DB system will bring the effects in saving time and cost by avoiding the overlapping generation of data in the areas of integrated climate-environment research.
Development of a Standard Vector Data Model for Interoperability of River-Geospatial Information
Shin, Hyung-Jin ; Chae, Hyo-Sok ; Lee, Eul-Rae ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 2, 2014, Pages 44~58
DOI : 10.11108/kagis.2014.17.2.044
In this study, a standard vector data model was developed for interoperability of river-geospatial information and for verification purpose the applicability of the standard vector model was evaluated using a model to RIMGIS vector data at Changnyeong-Hapcheon & Gangjung-Goryeong irrigation watershed. The standards from ISO and OGC were analyzed and the river geospatial data model standard was established by applying the standards. The ERD was designed based on the analysis information on data characteristics and relationship. The verification of RIMGIS vector data included points, lines and polygon to develope GDM was carried out by comparing with the data by layer. This conducting comparison of basic spatial data and attribute data to each record and spatial information vertex. The error in the process of conversion was 0 %, indicating no problem with model. Our Geospatial Data Model presented in this study provides a new and consistent format for the storage and retrieval of river geospatial data from connected database. It is designed to facilitators integrated analysis of large data sets collected by multiple institutes.
Spatio-Temporal Distribution Analysis of One-Person Household - The Case of Busan City -
Yoo, Chang-Ju ; Nam, Kwang-Woo ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 2, 2014, Pages 59~71
DOI : 10.11108/kagis.2014.17.2.059
At present, Korean one-person households have been continuously increased in spite of the reduction of total population. The increasement of one-person household has become a social and institutional issue. It is necessary to response socially and economically to not only changes of housing demand but also the disadvantaged classes such as the socially weak and single elderly household from the national level. In this respect, this research examined the spatial distribution (such as the increasing area, high-density area, and majority area) of one-person household with census data in the city of Busan. The clusters of one-person households were selected by focusing on the spatial distributions by time series changes of 2000, 2005, and 2010 and considering their housing characteristics. In terms of policy efficiency, the clusters of one-person households to be supported by priority were derived by analyzing the census data from 6066 output areas in the city of Busan. As a result, lots of one-person households of juniors were distributed around the university town, office facility, and station service area. Lots of one-person households at middle-aged class were distributed in Busan`s original downtown and mountain-side road. Generalizing these characteristics, cluster analysis was conducted. As a result, one-person household dense area in Busan could be classified into four types. This research should be utilized as a counterplan for increasing the housing demand of one-person household or basic data for supporting small housing supply policies in the future.
A Web Application for Open Data Visualization Using R
Kim, Kwang-Seob ; Lee, Ki-Won ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 2, 2014, Pages 72~81
DOI : 10.11108/kagis.2014.17.2.072
As big data are one of main issues in the recent days, the interests on their technologies are also increasing. Among several technological bases, this study focuses on data visualization and R based on open source. In general, the term of data visualization can be summarized as the web technologies for constructing, manipulating and displaying various types of graphic objects in the interactive mode. R is an operating environment or a language for statistical data analysis from basic to advanced level. In this study, a web application with these technological aspects and components is newly implemented and exemplified with data visualization for geo-based open data provided by public organizations or government agencies. This application model does not need users` data building or proprietary software installation. Futhermore it is designed for users in the geo-spatial application field with less experiences and little knowledges about R. The results of data visualization by this application can support decision making process of web users accessible to this service. It is expected that the more practical and various applications with R-based geo-statistical analysis functions and complex operations linked to big data contribute to expanding the scope and the range of the geo-spatial application.
Analysis of Relationship between Land Cover Change and Vegetation Temperature Condition Index in Central Dry Zone of Myanmar
Choi, Sol-E ; Lee, Woo-Kyun ; Yu, Hangnan ; Kang, Ho-Duck ; Kim, Yong-Suk ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 2, 2014, Pages 82~94
DOI : 10.11108/kagis.2014.17.2.082
The purpose of this study is to investigate the cause of increasing dry zones through analyzing relationships between land cover and Vegetation Temperature Condition Index(VTCI) using Landsat 4-5 TM satellite images in Central Dry Zones of Myanmar. As a result of land cover classifications, while vegetation areas gradually decrease, residential area and cropland were increased. VTCI analysis shows that region (a) showed a gradual decrease in the area of severely arid, and increase in the area of moderate dry and wet, which sums up to a slight decrease in aridity. Region (b) also showed to increase in dry areas and severe aridity. The result of relational analysis between VTCI and land cover change showed high ratio of land cover change, from severe arid area to forest and residential farmland. The average VTCI decreased in the changed land covers, which indicates the relationship between aridity and land cover change and a gradual increase in the arid area was identified.
A Study on the Validation of Vector Data Model for River-Geospatial Information and Building Its Portal System
Shin, Hyung-Jin ; Chae, Hyo-Sok ; Hwang, Eui-Ho ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 2, 2014, Pages 95~106
DOI : 10.11108/kagis.2014.17.2.095
In this study, the applicability of a standard vector model was evaluated using RIMGIS vector data and a portal based river-geospatial information web service system was developed using XML and JSON based data linkage between the server and the client. The RIMGIS vector data including points, lines, and polygons were converted to the Geospatial Data Model(GDM) developed in this study and were validated by layers. After the conversion, it was identified that the attribute data of a shape file remained without loss. The GeoServer GDB(GeoDataBase) that manages a DB in the portal was developed as a management module. The XML-based Geography Markup Language(GML) standards of OGC was used for accessing to and managing vector layers and encoding spatial data. The separation of data content and expression in the GML allowed the different expressions of the same data, convenient data revision and update, and enhancing the expandability. In the future, it is necessary to improve the access, exchange, and storage of river-geospatial information through the user`s customized services and Internet accessibility.
An Integrated Information Distribution System for Mountain Ridgelines Using Spatial Information
Lee, Moung-Jin ; Lee, Soo-Jae ; Lee, Chang-Yeon ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 2, 2014, Pages 107~120
DOI : 10.11108/kagis.2014.17.2.107
First purpose of this study is to build Korean mountain ridgelines based on GIS by using spatial information and analyze natural environment around mountain ridgelines built before. Second purpose of this study is to integrate Korean ridgelines and natural environment built before and then provide the integrated information related to ridgelines for public. To do so, fist of all, Korean mountain ridgelines including Deagan, Jeongmeak, Gimeak, Jimeak, are built as spatial information. Second, Encoding of mountain ridgelines is conducted to analyze main and divaricate ridgelines systematically as grades of ridgelines. Third, based on spatial information, present condition using natural environment including geographical information, ecological zoning map, environmental conservation value assessment map, is analyzed. Finally, as a method integrating and using the aforementioned three information, the system providing integrated information based on GIS is proposed, To build the GIS data of Gimeak and Jimeak, they should be analyzed in more detail than Beakdu Deagan and Jeongmeak, so existing methodology to build mountain ridgelines based on GIS is improved. According to the distance of each mountain ridgeline, they are separated into five grades, and encoding of each mountain ridgeline based on Beakdu Deagan is applied to all mountain ridgelines to figure out the present condition of ridgelines themselves. In addition, according to the distance of each mountain ridgeline, it is separated into three areas: core, buffer, median zone. Based on three zones, the way to make use of the information efficiently related to mountain ridgelines is proposed. This study systematizes Korean mountain ridgelines which did not have systematic structures and then analyzes systematic mountain ridgelines. Based on this analysis, this study finds the way to makes use of information related to mountain ridgelines effectively.
Analysis of Land Cover Characteristics with Object-Based Classification Method - Focusing on the DMZ in Inje-gun, Gangwon-do -
Na, Hyun-Sup ; Lee, Jung-Soo ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 2, 2014, Pages 121~135
DOI : 10.11108/kagis.2014.17.2.121
Object-based classification methods provide a valid alternative to traditional pixel-based methods. This study reports the results of an object-based classification to examine land cover in the demilitarized zones(DMZs) of Inje-gun. We used land cover classes(7 classes for main category and 13 classes for sub-category) selected from the criteria by Korea Ministry of Environment. The average and standard deviation of the spectrum values, and homogeneity of GLCM were chosen to map land cover types in an hierarchical approach using the nearest neighborhood method. We then identified the distributional characteristics of land cover by considering 3 topographic characteristics (altitude, slope gradient, distance from the Southern Limited Line(SLL)) within the DMZs. The results showed that scale 72, shape 0.2, color 0.8, compactness 0.5 and smoothness 0.5 were the optimum weight values while scale, shape and color were most influenced parameters in image segmentation. The forests (92%) were main land cover type in the DMZs; the grassland(5%), the urban area (2%) and the forests (broadleaf forest: 44%, mixed forest: 42%, coniferous forest: 6%) also occupied mostly in land cover classes for sub-category. The results also showed that facilities and roads had higher density within 2 km from the SLL, while paddy, field and bare land were distributed largely outside 6 km from the SLL. In addition, there was apparent distinction in land cover by topographic characteristics. The forest had higher density at above altitude 600m and above slope gradient
while agriculture, bare land and grass land were distributed mainly at below altitude 600m and below slope gradient
Development of Thermal Comfort Evaluation Map by the Land Cover in Yeongnam Region
Kang, Dong-Hyun ; Choi, Chul-Hyun ; Jung, Sung-Gwan ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 2, 2014, Pages 136~155
DOI : 10.11108/kagis.2014.17.2.136
The purpose of this study is to analyze the thermal comfort in Yeongnam area using climatic data and GIS data in order to determine regions necessary to improve thermal environment policies. The results of the calculated PET show that Daegu city is high and Bonghwa-gun is low compared to other regions. PET was compared with the typical classification according to regional characteristics. As a result, PET value of rural areas such as Changnyeong-gun, Haman-gun and Goryeong-gun was high but Green space was too low compared to other rural areas. Yeongnam area was classified according to the value of PET using cluster analysis. As a result, more low grade areas show that green space ratio was low and facility area was high. It is determined that there is a relationship between thermal comfort and land cover. The thermal comfort evaluation map in Yeongnam area will be useful for urban planning in order to establish a sustainable city in climate change.
Validation of ENVI-met Model with In Situ Measurements Considering Spatial Characteristics of Land Use Types
Song, Bong-Geun ; Park, Kyung-Hun ; Jung, Sung-Gwan ;
Journal of the Korean Association of Geographic Information Studies, volume 17, issue 2, 2014, Pages 156~172
DOI : 10.11108/kagis.2014.17.2.156
This research measures and compares on-site net radiation energy, air temperature, wind speed, and surface temperature considering various spatial characteristics with a focus on land use types in urban areas in Changwon, Southern Gyeongsangnam-do, to analyze the accuracy of an ENVI-met model, which is an analysis program of microclimate. The on-site measurement was performed for three days in a mobile measurement: two days during the daytime and one day during the nighttime. The analysis using the ENVI-met model was also performed in the same time zone as the on-site measurement. The results indicated that the ENVI-met model showed higher net radiation than the on-site measurement by approximately
during the daytime whereas the latter showed higher net radiation energy by approximately
during the nighttime. The temperature was found to be much higher by approximately
in the on-site measurement during both the daytime and nighttime. The on-site measurement also showed higher surface temperature than the ENVI-met by approximately
. In terms of the wind speed, there was a significant difference between the results of the ENVI-met model and on-site measurement. As for the correlation between the results of the ENVI-met model and on-site measurement, the temperature showed significantly high correlation whereas the correlations for the net radiation energy, surface temperature, and wind speed were very low. These results appear to be affected by excessive or under estimation of solar and terrestrial radiation and climatic conditions of the surrounding areas and characteristics of land cover. Hence, these factors should be considered when applying these findings in urban and environment planning for improving the microclimate in urban areas.