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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 13, Issue 4 - Dec 2005
Volume 13, Issue 3 - Sep 2005
Volume 13, Issue 2 - Jun 2005
Volume 13, Issue 1 - Mar 2005
Selecting the target year
The Establishment of the Quality Management Method for Spatial Data Construction Process
Choi, Byoung-Gil ; Cho, Kwang-Hee ; Lee, Kwang-Won ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 3, 2005, Pages 3~13
This study aims to establish the quality management method for spatial data construction process. Total 17 regulations related to spatial database construction and major aerial survey firms were analyzed in terms of working process, equipments, accuracy of results. It is standardized the process of making new digital maps using aerial photography, revising existing digital maps, producing digital elevation models and developing imagery maps. Quality checking factors for spatial data construction process are also established.
The Method for Efficient Land Suitability Assessment in an Island Group
Goh, Hong-Seok ; Park, Song-Ju ; Goh, Nam-Young ; Sung, Dong-Gwon ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 3, 2005, Pages 15~24
The Land Suitability Assessment(LSA) that was introduced to prevent the unplanned development was viewed from it has applied the same assessment factor on inland and island that has a many different spatial and physical properties, it have many problems. To study the efficient LSA in island that has an totally different spatial, local properties, assessment unit(AU) which the zone of life was considered and on this based, assessment factor was developed. In the AU, middle sized life zone was the best AU to present the regional land properties. In the distance analysis, distance analysis that considered sea was suggested and use it, we ran present the assessment method that was considered the access between islands.
3D Building Modeling Using LIDAR Data and Digital Map
Kim, Heung-Sik ; Chang, Hwi-Jeong ; Cho, Woo-Sug ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 3, 2005, Pages 25~32
This paper presents a method for point-based 3D building reconstruction using Lidar data and digital map. The proposed method consists of three processes: extraction of building roof points, identification of roof types, and 3D building reconstruction. After extracting points inside the polygon of building, the ground surface, wall and tree points among the extracted points are removed through the filtering process. The filtered points are then fitted into the flat plane using ODR(Orthogonal Distance Regression) in the first place. If the fitting error is within the predefined threshold, the surface is classified as a flat roof. Otherwise, the surface is fitted and classified into a gable or arch roof through RMSE analysis. Experimental results showed that the proposed method classified successfully three different types of roof and that the fusion of LIDAR data and digital map could be a feasible method of modeling 3D building reconstruction.
A Study on Efficient Topography Classification of High Resolution Satelite Image
Lim, Hye-Young ; Kim, Hwang-Soo ; Choi, Joon-Seog ; Song, Seung-Ho ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 3, 2005, Pages 33~40
The aim of remotely sensed data classification is to produce the best accuracy map of the earth surface assigning each pixel to its appropriate category of the real-world. The classification of satellite multi-spectral image data has become tool for generating ground cover map. Many classification methods exist. In this study, MLC(Maximum Likelihood Classification), ANN(Artificial neural network), SVM(Support Vector Machine), Naive Bayes classifier algorithms are compared using IKONOS image of the part of Dalsung Gun, Daegu area. Two preprocessing methods are performed-PCA(Principal component analysis), ICA(Independent Component Analysis). Boosting algorithms also performed. By the combination of appropriate feature selection pre-processing and classifier, the best results were obtained.
Disasters Risk Assessment of Urban Areas by Geospatial Information Systems
Yoo, Hwan-Hee ; Kim, Seong-Sam ; Park, Ki-Youn ; Choi, Woo-Suk ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 3, 2005, Pages 41~52
The high density of population and building; can cause catastrophe in urban areas when natural or artificial disasters break out. The aim of this paper is to assess comprehensive disasters risk of urban areas by Geospatial Information System. For this purpose, we classified disasters risk of urban areas into low categories: flood, fire, building-collapse, and shelter, and then determined factors for hazard risk assessment respectively. The results of hazard assessment can be applied to minimize the demage of disasters in establishing the urban management planning. For more systematic and professional approach the further research is need to consider more disaster assessment factors and join with related experts.
A prediction and distribution of Moors Applying to Environment Assesment Based on E-GIS
Kwak, Young-Joo ; Park, Sang-Yong ; Kang, In-Joon ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 3, 2005, Pages 53~57
The moors ecosystem is sensitive environment change and weak in artificial interference. These nature property are very important to people. It is necessary to preservation and protection the moors with a countermeasure. We really need to Environment-GIS(E-GIS) using Geographical Information System(GIS) and digital map including range, correct position and attribute data of moors. In this study, we take priority of making a database of moors management. Taking effect an environment assesment, we concentrate on a standard method of digital map production and a preservation of moors in our research using GIS. Especially, we have to preserve our important national heritage using GIS when Environment Assesment is conducting under construction. We suggest to pre-estimated model of hidden moors as analysing terrain, geological feature, a geographical distribution of plants and animals using GIS.
Automatic Building Extraction Using LIDAR and Aerial Image
Jeong, Jae-Wook ; Jang, Hwi-Jeong ; Kim, Yu-Seok ; Cho, Woo-Sug ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 3, 2005, Pages 59~67
Building information is primary source in many applications such as mapping, telecommunication, car navigation and virtual city modeling. While aerial CCD images which are captured by passive sensor(digital camera) provide horizontal positioning in high accuracy, it is far difficult to process them in automatic fashion due to their inherent properties such as perspective projection and occlusion. On the other hand, LIDAR system offers 3D information about each surface rapidly and accurately in the form of irregularly distributed point clouds. Contrary to the optical images, it is much difficult to obtain semantic information such as building boundary and object segmentation. Photogrammetry and LIDAR have their own major advantages and drawbacks for reconstructing earth surfaces. The purpose of this investigation is to automatically obtain spatial information of 3D buildings by fusing LIDAR data with aerial CCD image. The experimental results show that most of the complex buildings are efficiently extracted by the proposed method and signalize that fusing LIDAR data and aerial CCD image improves feasibility of the automatic detection and extraction of buildings in automatic fashion.
Environment-Friendly Optimum Route Selecting With Geo-spatial Information Analysis
Kim, Sang-Seok ; Jang, Yong-Gu ; Choi, Su-Geun ; Kang, In-Joon ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 3, 2005, Pages 69~77
Most of the evaluations of environmental effect of construction of road do not run parallel with the evaluation of the propriety of the business, but it just reviews how to reduce contamination before the beginning of the construction work. This reveals the limitation of the induction of environment friendly development from the fundamental. In this study, a function of GIS spatial analysis for 9 elements of pre-evaluation of environmental effect has been introduced, and a GIS decision making system for environmental effect of a road has been established for an integrated evaluation by using individual evaluation result. By using GIS decision making system for pre-evaluation of environmental effect that has been developed in this study and the GIS data that has been collected, it would be possible to decrease time and money for evaluation as well as fulfill the requirement of objectivity. Therefore, it would be possible to apply for pre-evaluation of environmental effect when deciding on the route of the road at the beginning stage of the construction work. Also, through the system developed in this study, the construction body could easily induce a mutual agreement with the residents by the visual evaluation material, which might result in an evaluation of environmental effect while decreasing time and money at the beginning stage of the construction.
A Study on Viewer Program Development for Usage at Mobile Device of Digital Map Ver. 2.0
Jeon, Jae-Yong ; Choi, Young-Taek ; Guak, Dong-Wook ; Cho, Gi-Sung ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 3, 2005, Pages 79~85
Early, national basic topographical map has been represented, stored, supplied in form of DXF(Data eXchange Format) and present digital map is equipped as over form. Since many parts of digital map has been equipped newly to use early digital map form for geographic information system. Especially, many structural editing and geographical search are demanded to exclude geometric inconsistency and logical inconsistency included in the existing digital map. As above, DXF is unsuitable data format to use in geographic information system. For the sake of efficient format, Digital Map Ver. 2.0 that is new map format was developed. In this study, we developed the Mobile Viewer program development which can let us see immediately the digital maps produced in the form of Digital Map Ver. 2.0.
Development of a Lane Detect Algorithm from Road-Facing Cameras on a Vehicle
Rhee, Soo-Ahm ; Lee, Tae-Yoon ; Kim, Tae-Jung ; Sung, Jung-Gon ;
Journal of Korean Society for Geospatial Information System, volume 13, issue 3, 2005, Pages 87~94
3D positional information of lane can be automatically calculated tv combining GPS data, IMU data if coordinates of lane centers are given. The Road Safety Survey and Analysis Vehicle(RoSSAV) is currently under development to analyze three dimensional safety and stability of roads. RoSSAV has GPS and IMU sensors to get positional information of the vehicle and two road-facing CCD cameras for extraction of lane coordinates. In this paper, we develop technology that automatically detects centers of lanes from the road-facing cameras of RoSSAV. The proposed algorithm defines line-support regions by grouping pixels with similar edge orientation and magnitude together and extracts a line from each line support region by planar fitting. Then if extracted lines and the region in-between satisfy the criteria of brightness and width, we decide this region as lane. The proposed algorithm was more precise and stable than the previously proposed algorithm based on brightness threshold method. Experiments with real road scenes confirmed that lane was effectively extracted by the proposed algorithm.