• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권7호
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• pp.3475-3496
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• 2018

Most of current watermarking algorithms for GIS vector data embed copyright information by means of modifying the coordinate values, which will do harm to its quality and accuracy. To preserve the fidelity of vector line data and protect its copyright at the same time, a lossless watermarking algorithm is proposed based on storage feature in this paper. Firstly, the superiority of embedding watermark based on storage feature is demonstrated theoretically and technically. Then, the basic concepts and operations on storage feature have been defined including length and angle of the polyline feature. In the process of embedding watermark, the watermark information is embedded into directions of polyline feature by the quantitative mechanism, while the positions of embedding watermark are determined by the feature length. Hence, the watermark can be extracted by the same geometric features without original data or watermark. Finally, experiments have been conducted to show that coordinate values remain unchanged after embedding watermark. Moreover, experimental results are presented to illustrate the effectiveness of the method.

• 한국항행학회논문지
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• 제2권1호
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• pp.43-52
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• 1998

본 논문에서는 다중 센서를 사용하는 센서 융합 환경에서 지형 정보의 사용이 다중 지상 표적 추적 성능에 어떠한 영향을 미치는가를 조사하였다. 지형 정보의 사용을 연계시와 표적의 발생을 제한하는 두 가지 경우에 대해 적용하였다. 전자의 경우는 거의 영향이 없었으나 후자의 경우는 오궤적의 수가 줄어드는 긍정적인 결과를 가져왔다. 결론적으로 지형 정보의 사용은 부가적인 센서의 운영으로 간주할 수 있기 때문에 좀 더 조심스러운 지형 정보의 사용이 요구된다.

• 한국지리정보학회지
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• 제11권4호
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• pp.1-9
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• 2008

유비쿼터스 기반 단말기에서 GIS 데이터 처리를 하기 위해서는 CPU 처리능력, 저장공간, 화면크기, 네트워크 등의 제약이 있다. 본 연구에서는 이러한 문제점들을 해결하기 위하여 기존의 연구결과를 개선하여 지적전산파일을 새롭게 디자인 하였다. 지적전산파일은 단순히 파일 형태로 구성되어 있어 화면에 출력하거나 지리정보 객체에 접근할 때 파일 전체를 읽어야 하는 불편함이 있다. 따라서 인덱스 파일을 추가하여 객체의 접근속도를 개선하고, 출력 속도를 증가시켰다. 결과적으로, 포맷 변환시 원본 데이터의 27.6%의 용량만을 가지며 기존 포맷보다 개선된 포맷을 얻을 수 있었다.

• Journal of Preventive Medicine and Public Health
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• 제26권3호
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• pp.430-441
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• 1993

The objectives of this study are two-fold : to identify geographic variations in the rate of tonsillectomy and adenoidectomy (T&A) and appendectomy and analyze the socioeconomic variables and health resources which affect geographic variation in the rate. The nationwide three month's cases of the two surgical procedures in 1991 are obtained from the record of the National Federation of Medical Insurance. The analysis shows two to ten-fold variations in the regional rates for the performance of two common procedures such as T&A and appendectomy. T&A shows a bigger regional variations than appendectomy. As a result of multiple regression, the factor of bed supply has been found significant for the dependent variable of the rate of T&A. The finding of large variations in the rate of surgical procedures throughout the country would have important implications for allocating scarce resources and managing quality of care. Further analysis is needed for the elaboration of the above implications.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2004년도 추계학술발표회 논문집
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• pp.361-366
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• 2004

Geographic Information has been used widely for landuse and management, city plan, and environment and disaster management, etc., But geographic information has been built for individual cases using various methods. Therefore, the discordancy in data, double investment, confusion of use and difficulty of decision supporting system have been occurred. In order to solve these problems, national government is need to framework database. This framework database was enacted for building and use of National Geographic Information System and focused on basic plan of the second national geographic information system. Also, the framework database was selected of eight fields by NGIS laws and 19 detailed items through meeting of framework committee since 2002. In this research, The 19 detailed items( road, railroad, coastline, surveying control point etc.,) of framework database consider a Priority order, In the result of this research, the framework database is obtain to a priority order for building and the national government will carry effectively out a budget for the framework database building. Each of 19 detailed items is grouping into using the priority order of the framework database by AHP analysis method and verified items by decision tree analysis method. The one of the highest priority order items is a road, which is important for building, continuous renovation, and maintain management for use.

• 대한공간정보학회지
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• 제17권4호
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• pp.75-80
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• 2009

봉수대는 예로부터 조선시대에 이르기까지 국방 및 통신에서 중요한 역할을 해왔다. 그동안의 봉수대에 대한 연구는 고문헌을 통한 조사에 집중되었다. 본 연구에서는 봉수대 입지 선정에 영향을 주는 요소들인 고도, 단면도, 봉수대간의 거리 및 가시권 등의 지형요소를 분석하였다. 그리고 봉수대의 입지 선정 시 지형적 요소가 어떻게 고려되었는지 분석하였다. 분석 결과 봉수대의 지형 특성은 신호전달에서는 봉수대간의 거리와 가시거리가 상관이 있었고 조망에 있어서는 해안과의 거리와 가시범위가 상관이 있었다. 봉수대의 위치 선정에 있어서는 한가지의 지형요소뿐만 아니라 어려 지형요소들이 복합적으로 고려되었다고 생각된다.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 1998년도 Proceedings of International Workshop on Advanced Image Technology
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• pp.105-110
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• 1998

This paper proposes a method to manage individual information on large scale distributed geographic information systems. On such system, ordinary users usually cannot alter the contents of the server. The method proposed in this paper makes possible to alter the contents or add individual data onto such kinds of non-write-permitted data onto set. We call the method as GDSF, ‘geographic differential script file’. In this method, a client user makes a GDSF which contains the private information to be added onto the served data. Then, the client keeps the file on a local disk. After this, when the user uses the data, he applies the differential data sequence onto the down loaded data to restore the information. The GDSF is a collection of picture commands which tell pictures insertions, deletions, and modification operations. The GDSF also can contain the modification. The GDSF also can contain the modification of the attribute information of geographic entities. The method also applicable to modify data on a ROM device, for example CD-ROM or DVD-ROM. This paper describes the method and experimental results.

• 대한조선학회논문집
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• 제55권2호
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• pp.116-123
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• 2018

These days, geographic information system has released in everyday life and industries. However, the shipyard only uses it to manage the layout of the yard. In this study, we apply the Geographic Information System to shipbuilding block logistics simulation to analyse the behavior of bogies and forklifts carrying blocks and materials in the shipyard. The shipyard manages daily block logistics plans at the execution planning stage. However, since it is a daily plan, it is difficult to respond to an unexpected situation immediately, and application to judge a certain value or higher value is insufficient. Therefore, a simulation model was created using the shape and attribute information inherent in the geographic information system to verify and improve the block logistics of the mid-and long-term yards. Through this simulation model, we will analyse loads on the workplace, stockyard, and road, and contribute to overall logistics improvement from the point of view of resource planning. In addition, the results of the simulation are reflected in the planning, to help support various decisions.

• Animal cells and systems
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• 제4권3호
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• pp.267-272
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• 2000

Partial sequence of the mitochondrial cytochrome b gene was analyzed to investigate genetic variation from 10 geographic populations of Granulilittorina exigua in Korea. The sequence of 282 base pairs was determined by PCR-directed silver sequencing method. The sequences of two species within the genus Littorina reserved in NIH blast search were utilized to determine geographic variations of species referred. The levels of mtDNA sequence differences were 0.00-2.54% within populations and 0.71-4.43% between populations. There were four amino acid differences between representative species of the genera Granulilittorina and Littorina, but no differences within populations of the genus Granulilittorina. The UPGMA and the N-J trees based on Tamura-Nei genetic distance matrix were constructed, which showed that the genus Granulilittorina was divided into three groups such as eastern (even exception for Tokdo population), southern, and western regional populations. The degrees of genetic divergence within populations of each group were p=0.021, p=0.019, and p=0.018, respectively. The divergence between the eastern and southern populations was p=0.032, showing closer relationship than with the western populations (p=0.052). Based on the diverged time estimation, the eastern and southern populations of Granulilittorina exigua in Korea diverged from the western populations about 2.1 MYBP, and the eastern and southern populations diverged from each other about 1.3 MYBP.

• 정보관리학회지
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• 제28권3호
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• pp.163-178
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• 2011

본 연구는 문헌정보학 분야에서 지리정보시스템을 어떻게 활용할 수 있는지에 대해 미국 플로리다주 Lake 카운티 도서관 이용자 정보를 이용하여 논의하였다. GIS의 다양한 기능 중에서 지오코딩, Thiessen 다각형, 밀집도, 버퍼, 이동거리의 측정 등의 툴들을 이용하여 도서관 이용자 정보를 분석하였다. 분석결과, 도서관 이용자의 위치나 분포형태에 대한 이해를 얻을 수 있었고 도서관 서비스 지역을 설정함으로써 도서관 서비스 계획수립을 위한 토대를 마련할 수 있었다. 또한 Thiessen 다각형이나 버퍼를 통해 이동거리가 도서관 이용에 미치는 영향을 분석함과 동시에 보다 현실적인 도서관 이용자의 이동거리를 측정하는 방법을 제시하였다.