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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 22, Issue 4 - Dec 2014
Volume 22, Issue 3 - Sep 2014
Volume 22, Issue 2 - Jun 2014
Volume 22, Issue 1 - Mar 2014
Selecting the target year
Extracting Method The New Roads by Using High-resolution Aerial Orthophotos
Lee, Kyeong Min ; Go, Shin Young ; Kim, Kyeong Min ; Cho, Gi Sung ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 3~10
DOI : 10.7319/kogsis.2014.22.3.003
Digital maps are made by experts who digitize the data from aerial image and field survey. And the digital maps are updated every 2 years in National Geographic Information Institute. Conventional Digitizing methods take a lot of time and cost. And geographic information needs to be modified and updated appropriately as geographical features are changing rapidly. Therefore in this paper, we modify the digital map updates the road information for rapid high-resolution aerial orthophoto taken at different times were performed HSI color conversion. Road area of the cassification was performed the region growing methods. In addition, changes in the target area for analysis by applying the CVA technique to compare the changed road area by analyzing the accuracy of the proposed extraction.
Impact of IPCC RCP Scenarios on Streamflow and Sediment in the Hoeya River Basin
Hwang, Chang Su ; Choi, Chul Uong ; Choi, Ji Sun ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 11~19
DOI : 10.7319/kogsis.2014.22.3.011
This study is analyze future climate and land cover change affects behaviors for amount of streamflow and sediment discharge within basin. We used the climate forecast data in RCP 4.5 and 8.5 (2011-2100) which is opposite view for each other among RCP scenarios that are discussed for 5th report for IPCC. Land cover map built based on a social economic storyline in RCP 4.5/8.5 using Logistic Regression model. In this study we set three scenarios: one scenario for climate change only, one for land cover change only, one for Last both climate change and land cover change. It simulated amount of streamflow and sediment discharge and the result showed a very definite change in the seasonal variation both of them. For climate change, spring and winter increased the amount of streamflow while summer and fall decreased them. Sediment showed the same pattern of change steamflow. Land cover change increases the amount of streamflow while it decreases the amount of sediment discharge, which is believed to be caused by increase of impervious Surface due to urbanization. Although land cover change less affects the amount of streamflow than climate change, it may maximize problems related to the amount of streamflow caused by climate change. Therefore, it`s required to address potential influence from climate change for effective water resource management and prepare suitable measurement for water resource.
The Systematization of Waste Landfill Site Selection Process utilizing GIS
Han, Ji Youn ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 21~30
DOI : 10.7319/kogsis.2014.22.3.021
Waste landfill site which is the facility usually rejected by communities is generally perceived as one of the serious social problems. It causes serious conflicts between interested parties from the beginning of the site selection process and produces various difficulties throughout the installation process. This study suggests the systematization and standardization of the landfill site selection process to reduce those problems and to objectify the process. The study process and results are as follows. First, the landfill site selection process was divided into 4 general phases rather than more specific fragmented phases and the requirements for each phase were suggested accordingly. This can make the process clearly organized and bring the standardization of the process by increasing the applicability of each phase for various situations. Second, the utilization of GIS(Geographic Information System) and PAPRIKA (Potentially All Pairwise RanKings of all possible Alternatives) among the various MCDA(Multi-Criteria Decision Analysis) methods was suggested as the objective and scientific method. Third, the hypothetical case study on the landfill site selection process of Cheongju city was conducted based on the information above and the results show the practicability and objectivity of the newly defined landfill site selection process in this study.
Evaluating Cross-correlation between Officially Land Price and Solar Radiation for Agricultural Field Parcels
Joo, Seung Min ; Choi, Jin Ho ; Shin, Hye Jin ; Um, Jung Sup ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 31~37
DOI : 10.7319/kogsis.2014.22.3.031
It is usual for the officially land price of agricultural field parcels to be determined by real estate appraisers`s experienced knowledge and intuition without considering quantitatively physical factors that directly influence agricultural productivity. Solar radiation is the most important predictor of agricultural productivity. GIS based simulation techniques were used to evaluate correlation between the officially land price and solar radiation for agricultural field parcels. The results show that officially land price shows random distribution patterns in relation to solar radiation, which proves that officially land price for agricultural field does not reflect agricultural productivity. It is anticipated that this research output could be used as a valuable reference to support more scientific and objective decision-making in the official pricing process of agricultural field parcels.
Positioning Accuracy Analysis According to the Change of Blockage Location and GNSS Signal Combination
Lee, Jae One ; Yun, Bu Yeol ; Park, Chi Young ; Choi, Hye Won ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 39~46
DOI : 10.7319/kogsis.2014.22.3.039
Network RTK positioning, one of GNSS positioning systems, is currently very popular due to its easy operation and low cost. However, the network RTK positioning unquestioningly accepts observation result acquired with an ambiguity fixed-solution regardless of different field conditions and situations, and then it is applied to the practice. This paper, therefore, has investigated the effects of field conditions obtained network RTK survey data for the area with obstacles on the variation of positioning accuracy. Being explained in detail, after conducting survey by GPS-only positioning and combined GPS/GLONASS observations giving changes to the distance from obstacles and elevation angles, and then accuracy results of each positioning method were compared each other. As a result, while GPS-only point positioning method showed more stable results than combined GPS/GLONASS method in the areas with no obstacles, combined method gave better result than GPS-only for the areas with presence of obstacles. Based on the results of this experiment, when the further study is conducted with a variety of different field conditions affecting the survey accuracy, it can be expected that the accuracy of network RTK survey method would become to more popular.
Analysis of National Vertical Datum Connection Using Tidal Bench Mark
Yoon, Ha Su ; Chang, Min Chol ; Choi, Yun Soo ; Huh, Yong ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 47~56
DOI : 10.7319/kogsis.2014.22.3.047
Recently, the velocity of sea-level rising has increased due to the global warming and the natural disasters have been occurred many times. Therefore, there are various demands for the integration of vertical reference datums for the ocean and land areas in order to develop a coastal area and prevent a natural disaster. Currently, the vertical datum for the ocean area refers to Local Mean Sea Level(LMSL) and the vertical datum for the land area is based on Incheon Mean Sea Level(IMSL). This study uses 31 points of Tidal Gauge Bench Mark (TGBM) in order to compares and analyzes the geometric heights referring LMSL, IMSL, and the nationally determined geoid surface. 11 points of comparable data are biased more than 10 cm when the geometric heights are compared. It seems to be caused by the inflow of river, the relocation of Tidal Gauge Station, and the topographic change by harbor construction. Also, this study analyze the inclination of sea surface which is the difference between IMSL and LMSL, and it shows the inclination of sea surface increases from the western to southern, and eastern seas. In this study, it is shown that TGBM can be used to integrate vertical datums for the ocean and land areas. In order to integrate the vertical datums, there need more surveying data connecting the ocean to the land area, also cooperation between Korea Hydrographic and Oceanographic Administration and National Geographic Information Institute. It is expected that the integrated vertical datum can be applied to the development of coastal area and the preventative of natural disaster.
A study of Establishment on Radiomap that Utilizes the Mobile device Indoor Positioning DB based on Wi-Fi
Jeong, In Hun ; Kim, Chong Mun ; Choi, Yun Soo ; Kim, Sang Bong ; Lee, Yun ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 57~69
DOI : 10.7319/kogsis.2014.22.3.057
As of 2013, Korean population density is 505 persons per
and is ranked 3rd place in the most densely populated countries exception of city-states. It shows clearly the population is concentrated in the city area. To fulfil this urban concentration population demand, the enlargement and complexation of buildings, subway and other underground spaces connection tendency has been intensified, and it is need to construct the indoor spatial information DB as well as the accurate indoor surveying DB to promote people`s safety and social welfare. In this study, Sadang station and Incheon National Airport were aimed for the construction of Wi-Fi AP location DB and RadioMap DB by collecting the indoor AP raw datas by using mobile device and those collected results were ran through the process of verification, supplementation, and analyzation. To evaluate the performance of constructed DB, 10 points in Incheon Airport- 3rd flr in block A, and 9 points in Sadang station-B1 were selected and calculated the estimated points and ran evaluation experiment using survey positioning error, which is distance between real position and the estimated position. The result shows that Incheon international airport`s average and standard deviation was separately 17.81m, 17.79m and Sadang station`s average and standard deviation was separately 22.64m, 23.74m. In Sadang station`s case, the areas near the exit has low performance of surveying position due to fewer visible AP points than other areas. As total datas were examined except those position, it was verified that the user`s location was mapping close position in surveying positioning by using constructed DB. It means that constructed DB contains correct Wi-Fi AP locations and radio wave patterns in object region, so it is considered that the indoor spatial information service based on constructed DB would be available.
Analysis of the Five Major Crime Utilizing the Correlation·Regression Analysis with GIS
Kim, Chang Kuy ; Kang, In Joon ; Park, Dong Hyun ; Kim, Sang Seok ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 71~77
DOI : 10.7319/kogsis.2014.22.3.071
People in the modern society want to live under safe and comfortable circumstances. As our society, however, is sharply developing, crimes are getting smarter and more difficult to treat. Above all, they often take place around us, and we are trying to cope with them variously in order to make our lives more comfortable and safer. In particular, five major crimes(Murde, Robber, Rape, Violence, Theft ) that most frequently occur in the real life are very threatening and fearful so it is necessary to deal with them with "the scientific method." In this study, therefore, we searched the frequency of crime by its type and analyzed spatial characteristics between crimes and criminal factors by using regression analysis and correlation analysis based on the crime data that has occurred around Geumjeng-gu, Busan so that we can confront five major crimes.
A Method of Generating Trafficability Analysis Map for UGV Navigation
Chang, Hye Min ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 79~85
DOI : 10.7319/kogsis.2014.22.3.079
For the successful operation of unmanned ground vehicles(UGVs), optimal path planning should be considered with trafficability analysis, threat analysis, and so on. From among these, trafficability analysis is immensely important for safeness of UGVs especially in the case of driving the off-road such as unpaved road, grassland, and open fields. Geographical information has a pivotal role in extracting data and measuring cost for specified regions of interest. In this paper, we review possibilities to apply Land Cover Map(LCM) as a new, fundamental source and propose a new generation method of trafficability analysis map for optimal path planning of UGV. The simulation results show that the proposed method significantly improve the previous method by applying LCM either alone or in combination with the other GIS.
Study on the Trends of U-City and Smart City Researches using Text Mining Technology
Lim, Si Yeong ; Lim, Yong Min ; Lee, Jae Yong ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 87~97
DOI : 10.7319/kogsis.2014.22.3.087
City is currently developing into intelligent city which adopts the ICT technology to resolve the problems and increase the competitiveness. This intelligent city is promoted under the name of U-City or Smart City, yet it is also criticized in the trend for what the differences between U-City and Smart City are. In this study, we draws the differences between U-City and Smart City from our distinctive research method, text mining which analyzes the trend of research papers, and contribute to direction of U-City study in the future. Through this analysis, the study results in that U-City focuses practical implementation in domestic cities while Smart City focuses technological development and provision of single service. However, this paper has a limitation as the subjective opinion was reflected to configure the sets of keywords, and only keywords and s were analyzed. Therefore, further studies are needed to confirm the differences between U-City and Smart City with related research papers and reports.
Pattern Analysis for Urban Spatial Distribution of Traffic Accidents in Jinju
Sung, Byeong Jun ; Yoo, Hwan Hee ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 99~105
DOI : 10.7319/kogsis.2014.22.3.099
Since traffic accidents account for the highest proportion of the artificial disasters which occur in urban areas along with fire, more scientific an analysis on the causes of traffic accidents and various prevention measures against traffic accidents are needed. In this study, the research selected Jinju-si, which belongs to local small and medium-sized cities as a research target to analyze the characteristics of temporal and spacial distribution of traffic accidents by associating the data of traffic accidents, occurred in 2013 with the causes of traffic accidents and location information that includes occurrence time and seasonal features. It subsequently examines the spatial correlation between traffic accidents and the characteristics of urban space development according to the plans of land using. As a result, the characteristics of accident distribution according to the types of accidents reveal that side right-angle collisions (car versus car) and pedestrian-crossing accident (car versus man) showed the highest clustering in the density analysis and average nearest neighbor analysis. In particular, traffic accidents occurred the most on roads which connect urban central commercial areas, high-density residential areas, and industrial areas. In addition, human damage in damage conditions, clear day in weather condition, dry condition in the road condition, and three-way intersection in the road way showed the highest clustering.
Geospatial Analysis for Oriental Medical Services of Jinju
Kim, Mi Song ; Yoo, Hwan Hee ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 107~112
DOI : 10.7319/kogsis.2014.22.3.107
In keeping with the increasing demand for medical services in accordance with the economic development, the use of oriental medicine is on the rise year by year. In particular, it is a tendency that the elderly over age 65 prefer the oriental medicine to the western medicine in Korea. Under the circumstance, changing into an aging society, the importance of oriental medical services has been growing. In this regard, this study evaluated the quality of medical services by conducting the density analysis and the accessibility analysis of oriental medical clinic targeting Jinju, which is one of local small and medium-sized cities. The study results reveal that oriental medical hospitals accounted for 27% of the entire medical facilities in Jinju, and there was an imbalance in the quality of the oriental medical services according to districts(called dong) because oriental medical hospitals were mainly concentrated in the central commercial areas. In particular, in terms of the analysis on the accessibility of an aging population over age 65 to the oriental medical hospitals, over 50% of the whole districts (dongs) in Jinju were blind spots in medical services, showing a very vulnerable condition. Accordingly, it is judged that systematic measures for improvement in support of the oriental medical services in local small and medium-sized cities should be provided in Korea when we consider the characteristics of Korea where an aging population is rapidly increasing.
Analysis of the Optimal Degree and Order of Spherical Harmonics for the GNSS Receiver Antenna`s PCV Correction
Kim, Jin Yi ; Won, Ji Hye ; Park, Kwan Dong ; Seo, Seung Woo ; Park, Heung Won ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 113~119
DOI : 10.7319/kogsis.2014.22.3.113
The positioning accuracy of GNSS surveys deteriorates due to various error factor, and many users sometimes ignore Phase Center Variation (PCV) of antennas. IGS provides an ANTEX file which contains PCV correction information to correct for PCVs. But it is not directly applicable because PCV correction information is provided at 5-degree intervals in the azimuth and elevation directions for the case of receiver antennas, and at 1-degree intervals in the nadir angle for the case of satellite antennas. So, we devised new and optimal ways of interpolating PCV in any desired line of sight to the GNSS satellite. We used spherical harmonics fitting methods in terms of the azimuth and elevation angle for interpolation, and found an optimal degree and order. It is shown that the best accuracy was obtained from the 8 by 8 spherical harmonics. If one requires lower burden on computing resources, the order and degree less than 8 could produce resonable accuracy except for 1st and 5th order.
Accuracy Investigation of DEM generated from Heterogeneous Stereo Satellite Images using Rational Polynomial Coefficients
Song, Yeong-Sun ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 121~128
DOI : 10.7319/kogsis.2014.22.3.121
This study investigated the accuracy of DEM generated by heterogeneous stereo satellite images based on RPC. Heterogeneous sensor images with different spatial resolution are SPOT-5 panchromatic and IKONOS images. For the accuracy evaluation of the DEM, we compared the DEMs generated from two kinds of sensors and that produced using homogeneous SPOT-5 and IKONOS stereo images. As results of the evaluation, accuracy of 3D positioning by heterogeneous images was substantially similar to that of homogeneous stereo images for exact conjugate points. But, in terms of quality of the DEM, DEM generated by heterogeneous sensor showed a lower accuracy about twice in RMSE and about 3 times in LE90 than that of homogeneous sensors. As a result, DEM can be generated by using heterogenous satellite imagery. But if we use a stereo image with different spatial resolution, the performance of image matching was very important factor for the production of high-quality DEM.
Analysis of Temporal and Spatial Red Tide Change in the South Sea of Korea Using the GOCI Images of COMS
Kim, Dong Kyoo ; Yoo, Hwan Hee ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 129~136
DOI : 10.7319/kogsis.2014.22.3.129
This study deals with red tide detection by using the remote sensing imagery from the Geostationary Ocean Color Imager (GOCI), the world`s first geostationary orbit satellite, around the southern coast of Korea where the most severe red tide occurred recently. The red tide zone was determined by the available data selection from the GOCI imagery during the period of red tide occurrence and also the severe red tide zone was detected through the spatial analysis by temporal change out of the red tide zone. This study results showed that the coast in the vicinity of the Hansan and Yokji in Tongyeong-si was classified into the severe red tide zone, and that the red tide was likely to spread from the coast of Hansan and Yokji to the one of Sanyang-eub. In addition, the comparative analysis between the area of red tide occurrence, the prevention activities of Gyeongsangnam-do provincial government and the amount of the damage cost over time showed close correlation among them. It is still early to conclude that the study is showing the severe red tide zone and the spread path exactly due to various factors for red tide occurrence and activities. In order to improve the reliability of the results, the more data analysis is required.
An Analysis of Vertical Position Accuracy for the Three-Dimensional Spatial Data Object Utilizing the Public Information
Kim, Jeong Taek ; Yi, Su Hyun ; Kim, Jong Il ; Bae, Sang Won ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 137~143
DOI : 10.7319/kogsis.2014.22.3.137
Recently, as new paradigm for government operation called government 3.0, government is actively operating policy opening and sharing public data. In addition, the Ministry of Land are operating an open platform integrated map service (the VWorld) which provides a variety of video contents such as the country`s national spatial information, traffic information and three-dimensional building for the public. According to W3C Foundation`s Open Data Status Report(2013), our country has the evaluated results that the part of the government`s policy support and planning is good while the part of the data management is vulnerable. So our country needs the quality improvement for the data management. In addition, a digital aerial photograph image data is required to be up-to-date for the three-dimensional spatial object data. In this paper, we present the method for enhancement of the accuracy of vertical position and for maintainment of up-to-date vertical position. Our methods evaluate the data quality and analyze the cause of error of measurement utilizing the national standard quality assessment method. The result of research shows that the accuracy of vertical position is improved if the height of the building captain is adjusted by the quality assessment values and a three-dimensional model has up-to-date data if reconstruction and extension information of construction register is utilized.
Generation of Mosaic Image using Aerial Oblique Images
Seo, Sang Il ; Park, Byung-Wook ; Lee, Byoung Kil ; Kim, Jong In ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 145~154
DOI : 10.7319/kogsis.2014.22.3.145
The road network becomes more complex and extensive. Therefore, the inconveniences are caused in accordance with the time delay of the restoration of damaged roads, demands for excessive costs on information collection, and limitations on acquisition of damage information of the roads. Recently, road centric spatial information is gathered using mobile multi sensor system for road inventory. But expensive MMS(Mobile Mapping System) equipments require high maintenance costs from beginning and takes a lot of time in the data processing. So research is needed for continuous maintenance by collecting and displaying the damaged information on a digital map using low cost mobile camera system. In this research we aim to develop the techniques for mosaic with a regular ground sample distance using successive image from oblique camera on a vehicle. For doing this, mosaic image is generated by estimating the homography of high resolution oblique image, and the ground sample distance and appropriate overlap are analyzed using high resolution aerial oblique images which contain resolution target. Based on this we have proposed the appropriate overlap and exposure interval for mobile road inventory system.
Study of Comparison of Classification Accuracy of Airborne Hyperspectral Image Land Cover Classification though Resolution Change
Cho, Hyung Gab ; Kim, Dong Wook ; Shin, Jung Il ;
Journal of Korean Society for Geospatial Information System, volume 22, issue 3, 2014, Pages 155~160
DOI : 10.7319/kogsis.2014.22.3.155
This paper deals with comparison of classification accuracy between three land cover classification results having difference in resolution and they were classified with eight classes including building, road, forest, etc. Airborne hyperspectral image used in this study was acquired at 1000m, 2000m, 3000m elevation and had 24 bands(0.5m spatial resolution), 48 bands(1.0m), 96 bands(1.5m). Assessment of classification accuracy showed that the classification using 48 bands hyperspectral image had outstanding result as compared with other images. For using hyperspectral image, it was verified that 1m spatial resolution image having 48 bands was appropriate to classify land cover and qualitative improvement is expected in thematic map creation using airborne hyperspectral image.