• Title/Summary/Keyword: GEO

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Implementation of a Geo-Semantic App by Combining Mobile User Contexts with Geographic Ontologies

  • Lee, Ha-Jung;Lee, Yang-Won
    • Spatial Information Research
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    • v.21 no.1
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    • pp.1-13
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    • 2013
  • This paper describes a GIS framework for geo-semantic information retrieval in mobile computing environments. We built geographic ontologies of POI (point of interest) and weather information for use in the combination of semantic, spatial, and temporal functions in a fully integrated database. We also implemented a geo-semantic app for Android-based smartphones that can extract more appropriate POIs in terms of user contexts and geographic ontologies and can visualize the POIs using Google Maps API (application programming interface). The feasibility tests showed our geo-semantic app can provide pertinent POI information according to mobile user contexts such as location, time, schedule, and weather. We can discover a baking CVS (convenience store) in the test of bakery search and can find out a drive-in theater for a not rainy day, which are good examples of the geo-semantic query using semantic, spatial, and temporal functions. As future work, we should need ontology-based inference systems and the LOD (linked open data) of various ontologies for more advanced sharing of geographic knowledge.

GeoNet: Web-based Renotely Sensed Image Processing System (GeoNet: 웹 기반 위성영상 처리)

  • Ahn, Chung-Hyun;Kim, Kyung-Ok
    • Journal of Korean Society for Geospatial Information Science
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    • v.8 no.2 s.16
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    • pp.109-116
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    • 2000
  • GeoNet is java-based remotely sensed image processing system. It is based on java Ibject-oriented paradigm and features cross-platform, web-based execution and extensibility to client/server remotely sensed image processing model. Remotely sensed image processing softwares made by java programming language can suggest alternatives to meet readily demand on remotely sensed image processing in proportion to increasement of remotely sensed data.

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Introduction of Geo-Mechatronics in Construction IT (정보화 시공분야에서의 Geo-mechatronics 기술의 전망)

  • Kim, Young-Seok
    • Proceedings of the Korean Geotechical Society Conference
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    • 2009.09a
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    • pp.1289-1293
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    • 2009
  • For the purpose of automatic management and enhancing quality of construction, information technology has been employed in construction field recently. As a consequence, informative construction, which utilizes information technology to reduce construction time and optimize construction sequence, becomes a state-of-art field of construction. Considering this case, construction field should more actively adopt other engineering technologies of rapidly advancing fields, such as electronic, control, and informative engineering, in order to reduce construction cost and to solve environmental problems as well as to enhance construction quality. In this aspect, this paper introduces a novel research field 'Geo-mechatronics', which stands for the convergence of geotechnical engineering and mechatronics (i.e. automation of mechanics using electronic technologies). Since the ground is ubiquitous in every infrastructure construction, the Geo-mechatronics research is crucial for the development of construction technology in the future. Moreover, it is believed to that the Geo-mechatronics research will make our construction industry to be more future-oriented and internationally comparative industry.

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u-GIS National Land Information Providing System (u-GIS 국토정보 제공 시스템)

  • Kim, Jae-Chul;Lee, Kyu-Chul
    • Journal of Korea Spatial Information System Society
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    • v.11 no.1
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    • pp.1-8
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    • 2009
  • The u-GIS national land information providing technology is the technology which maximizes the application of u- GIS data through the national land information platform technique of the next generation web and provides a user with the on-demand national land information in the ubiquitous environment. Recently, as the environment emphasizing the web as a platform 'Web 2.0' emerges, the where 2.0 which is paradigm is diffused in the spatial information area. And the Geo-spatial Web technology develops in a center. Moreover, it is changed to the open platform of the user participation trend. And the consumer of the geo-spatial information is changed to the end-user center from the public institution. The geo-spatial technique is technologically faced with the new challenge. In this paper, we analyze the technical tendency about a paradigm, And we present the u-GIS national land information platform technique, the u-GIS national land information visualization technology, the u-GIS national land information GeoDRM integrative technique, and the u-GIS national land information mobile application technology as the essential elemental technology for overcoming this.

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A Case Study for Creativity Assessment of Problem Solving Process of Mathematically Gifted High School Students Utilizing Construction Protocol of GeoGebra (GeoGebra의 구성단계 기능을 활용한 고등학교 수학 영재 문제해결 과정의 창의성 평가 사례 연구)

  • Yang, Seonghyun
    • Journal of Gifted/Talented Education
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    • v.24 no.6
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    • pp.897-916
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    • 2014
  • In this study, we presented a teaching-learning method that can apply process-focused assessment for mathematical creativity of problem solving process of the gifted student, By necessity of appropriate teaching-learning program development to the level and ability of students who belong to high school gifted classes and courses evaluation for students who participated in education programs for the gifted. In the construction implementation process of students utilizing a kind of teaching-learning software, GeoGebra. We analyzed process of a variety of creative constructing figures using interfaces of GeoGebra and algebraic calculation. Utilizing 'Construction Protocol' and 'Navigation Bar' of GeoGebra, We identified computer languages, construction order, run times used in construction process of individual student and found mathematical creativity of students in the process. Comparing this result with prerequisite learning degree of individual student, We verified that this teaching-learning method can apply at the high school gifted classes as well as institutes for the gifted education in the city office.

A Study on the Efficient Maintenance of Geo-Spatial Information (지형정보의 효율적 유지관리 방안)

  • Lee, Bo-Mi
    • Journal of the Korean Association of Geographic Information Studies
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    • v.12 no.3
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    • pp.1-12
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    • 2009
  • This study aims to analyze the existing problem of geo-spatial information maintenance and then, show maintenance strategies suitable for new integrated environments. We look for AS-IS which is provider-centered, top-down, and also drive implications from analyzing oversea best practice. For analyzing of geo-spatial maintenance pattern, we polled about 20 local governments and private enterprise to find out AS-IS of geo-spatial information and result in maintenance pattern and component. From this, we suggest 4 kinds of strategies. This study shows the strategy not only which decide the question about the problem of existing geo-spatial maintenance but which find a way of combining and utilizing all geo-spatial information which is 8 criteria basic geographical information. This is a win-win program of all organization which produce, construct, make full use of national geo-spatial information.

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VS Prediction Model Using SPT-N Values and Soil Layers in South Korea (표준관입시험 및 시추공 정보를 이용한 국내 전단파속도 예측)

  • Heo, Gi-Seok;Kwak, Dong-Youp
    • Journal of the Korean Geotechnical Society
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    • v.38 no.8
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    • pp.53-66
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    • 2022
  • The national ground survey database (GeoInfo) distributes numerous ground survey data nationwide. Many standard penetration test results exist in this database; however, the number of shear wave velocity (VS) data is small. Hence, to use abundant standard penetration test-N values to predict VS, this study proposed a new empirical N-VS relationship model using GeoInfo data. The proposed N-VS model is a single equation regardless of geological layer types; the layer type only specifies the upper limit of VS. To validate the proposed model, residual analysis was performed using a test dataset that was not used for the model development. Therefore, this study's proposed model performed better than N-VS models from previous studies. Since the N-VS model in this study was developed using sufficient data from GeoInfo, we expect that it is the most applicable to GeoInfo dataset for VS prediction.

Development and Application of a Methodology to Build Geotechnical Information System Based on Geo-Knowledge Using GIS Technology (GIS를 이용한 지반-지식 기반 지반 정보화 시스템 구축 기법의 개발 및 적용)

  • Sun Chang-Guk;Chung Choong-Ki
    • Journal of the Korean Geotechnical Society
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    • v.22 no.2
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    • pp.55-68
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    • 2006
  • For the reliable prediction of spatial geotechnical data, a procedure to build the Geotechnical Information System (GTIS) based on geo-knowledge within the frame of GIS technology was developed by introducing a couple of new concepts of the extended area containing the study area and the additional site visit for acquiring surface geological data. To build the GTIS for Gyeongju as the case study of regional model application, intensive site investigations and pre-existing geotechnical data collections were performed and additional site visit was also carried out for acquiring surface geo-layer data in accordance with the developed procedure. Within the GTIS based on geo-knowledge for Gyeongiu area, the spatially distributed geo-layers across the extended area were predicted using the geostatistical kriging method and those for the study area were extracted. Furthermore, the spatial distribution maps for the thickess of geo-layers and the depth to bedrock were constructed for the practical use in geotechnical field. It was evaluated that the GTIS based on geo-knowledge developed in this study is superior to the conventional geotechnical GIS in terms of both the standard deviation and the geological expert judgment.

Analysis of Rainfall-Runoff Characteristic at Mountainous Watershed Using GeoWEPP and SWAT Model (GeoWEPP과 SWAT 모델을 이용한 산지 유역 강우-유출량 특성 분석)

  • Kim, Jisu;Kim, Minseok;Kim, Jin Kwan;Oh, Hyun-Joo;Woo, Choongshik
    • Journal of The Geomorphological Association of Korea
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    • v.28 no.2
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    • pp.31-44
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    • 2021
  • Due to recent climate change, continuous soil loss is occurring in the mountainous watershed. The development of geographic information systems allows the spatial simulation of soil loss through hydrological models, but more researches applied to the mountain watershed areas in Korea are needed. In this study, prior to simulating the soil loss characteristics of the mountainous watershed, the field monitoring and the SWAT and GeoWEPP models were used to simulate and analyze the rainfall and runoff characteristics in the mountainous watershed area of Jirisan National Park. As a result of monitoring, runoff showed a characteristic of a rapid response as rainfall increased and decreased. In the simulation runoff results of calibrated SWAT models, R2, RMSE and NSE was 0.95, 0.03, and 0.95, respectively. The runoff simulation results of the GeoWEPP model were evaluated as 0.89, 0.30, and 0.83 for R2, RMSE, and NSE, respectively. These results, therefore, imply that the runoff simulated through SWAT and GeoWEPP models can be used to simulate soil loss. However, the results of the two models differ from the parameters and base flow of actual main channel, and further consideration is required to increase the model's accuracy.

A Preliminary Study of Quality Certification System for Geo-Spatial Information Device (공간정보 기기 품질인증을 위한 기초연구)

  • Kim, Jae-Myeong;Choi, Yun-Soo;Seo, Jae-Pil;Chang, Eun-Mi
    • Spatial Information Research
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    • v.19 no.4
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    • pp.33-43
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    • 2011
  • Countries all over the world have been operating various certification systems to protect their consumers, and these systems have become trade barriers between countries. Also, KS and KCC were not designed to reflect characteristics of Geo-Spatial Information Device. The purpose of this study was to derive the plan of Quality Certification System for Geo-Spatial Information Device through the analyses of the existing Quality Certification System. The results of this study were as follows. Firstly, we defined the concept of Quality Certification System for Geo-Spatial Information Device. Secondly, we set the boundary, factors and process of Quality Certification System for Geo-Spatial Information Device through classifying it in detail. Lastly, we suggested about fundamental concept of Quality Certification System for Geo-Spatial Information Device a the analyses of the existing Quality Certification System.