• 제목/요약/키워드: geographic center

검색결과 554건 처리시간 0.029초

Application of Remotely Sensed Data and Geographic Information System in Watershed Management Planning in Imha, Korea

  • CHAE Hyo-Sok;LEE Geun-Sang;KIM Tae-Joon;KOH Deuk-Koo
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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    • pp.361-364
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    • 2005
  • The use of remotely sensed data and geographic information system (GIS) to develop conservation-oriented watershed management strategies on Imha Dam, Korea, is presented. The change of land use for study area was analyzed using multi-temporal Landsat imagery. A soil loss model was executed within a GIS environment to evaluate watershed management strategies in terms of soil loss. In general, remotely sensed data provide efficient means of generating the input data required for the soil loss model. Also, GIS allowed for easy assessment of the relative erosion hazard over the watershed under the different land use change options. The soil loss model predicted substantial declines in soil loss under conservation-oriented land management compared to current land management for Imha Dam. The results of this study indicate that soil loss potential (5,782,829 ton/yr) on Imha Dam in 2003 is approximately 1.27 times higher than that (4,557,151 ton/yr) in 1989. This study represents the first attempt in the application of GIS technology to watershed conservation planning for Imha Dam. The procedures developed will contribute to the evolution of a decision support system to guide the land planning and dam management in Imha Dam.

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4S-Van: A Prototype Mobile Mapping System for GIS

  • Lee, Seung-Yong;Kim, Seong-Baek;Choi, Ji-Hoon;Lee, Jong-Hun
    • 대한원격탐사학회지
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    • 제19권1호
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    • pp.91-97
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    • 2003
  • The design of Graphic Information System(GIS) in various applications is suffering from the difficulty of data acquisition, which is labor-intensive and time consuming. In order to provide the spatial data rapidly and accurately, 4S-Van, a prototype mobile mapping system, has been developed. The 4S-Van consists of 1)Global Positioning System(GPS), Inertial Navigation System(INS) for estimating the geographic position and attitude of the moving van, i.e.,(x, y, z) and the direction of the Van, 2) Charge Coupled Device(CCD) camera and laser scanner for capturing images and for measuring depth from geographic objects, and 3) External Synchronization Device(ESD) and industrial PC for synchronizing data from GPS/INS/CCD camera and for storing the data. In this paper, we present the design and implementation of the proto-Dpe 4S-Van system for spatial data acquisition for various GIS applications.

실내 공간을 위한 위치 모델 (Location Model for Indoor Space)

  • 강혜경;이기준
    • 한국공간정보시스템학회:학술대회논문집
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    • 한국공간정보시스템학회 2007년도 GIS 공동춘계학술대회 논문집
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    • pp.51-56
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    • 2007
  • 본 연구는 유비쿼터스 컴퓨팅 환경을 기반으로 실내 공간 위치정보를 표현하는 위치모델을 제안한다. 실내 공간은 실외공간과 마찬가지로 유클리디언 공간, 네트워크 공간, 기호 공간의 성격을 동시에 가지고 있다. 그러나 현재 실외공간을 대상으로 하는 위치서비스의 경우, 도로 혹은 평면 공간처럼 어느 한 공간을 가정하고 위치 서비스를 제공하는 반면, 실내공간에서의 위치서비스는 이 세 가지 공간을 동시에 고려해야하는 차이점이 있다. 이 논문은 세 가지 공간의 특성을 소개한 후, 각각의 공간을 위해 현재 사용되는 공간 위치모델을 간략히 소개한다. 이를 바탕으로, 실내 위치모델을 위한 요구사항을 정리하고, 세 가지 공간모델을 통합하는 실내 위치 모델을 제안한다. 특히 본 연구에서 제안하는 모델은 실내 공간들 간의 접근성 표현할 수 있으며, 현재 사용되고 있는 공간모델에 실내 위치모델을 위한 모델요소를 추가하는 형태로 설계되었으므로, 현재 개발된 지리정보 시스템들과의 호환성을 지원한다는 점에서 의의가 있다.

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Map Detection using Deep Learning

  • Oh, Byoung-Woo
    • 한국정보기술학회 영문논문지
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    • 제10권2호
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    • pp.61-72
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    • 2020
  • Recently, researches that are using deep learning technology in various fields are being conducted. The fields include geographic map processing. In this paper, I propose a method to infer where the map area included in the image is. The proposed method generates and learns images including a map, detects map areas from input images, extracts character strings belonging to those map areas, and converts the extracted character strings into coordinates through geocoding to infer the coordinates of the input image. Faster R-CNN was used for learning and map detection. In the experiment, the difference between the center coordinate of the map on the test image and the center coordinate of the detected map is calculated. The median value of the results of the experiment is 0.00158 for longitude and 0.00090 for latitude. In terms of distance, the difference is 141m in the east-west direction and 100m in the north-south direction.

Analysis of Genetic Diversity and Population Structure of Buckwheat (Fagopyrum esculentum Moench) Landraces of Korea Using SSR Markers

  • Song, Jae-Young;Lee, Gi-An;Yoon, Mun-Sup;Ma, Kyung-Ho;Choi, Yu-Mi;Lee, Jung-Ro;Jung, Yeon-Ju;Park, Hong-Jae;Kim, Chung-Kon;Lee, Myung-Chul
    • 한국자원식물학회지
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    • 제24권6호
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    • pp.702-711
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    • 2011
  • Buckwheat (Fagopyrum esculentum Moench), one of the minor crops grown in Korea belonging to the Polygonaceae family, is an annual crop widely cultivated in Asia, Europe, and America and has a character of outcrossing and self-incompatibility. The objective of this study was to analyze the genetic variability, phylogenetic relationships and population structure of buckwheat landraces of Korea using SSR markers. Ten microsatellite markers have been detected from a total of 79 alleles among the 179 buckwheat accessions were collected from Korea. The number of allele per marker locus ($N_A$) ranged from 2 (GB-FE-001, GB-FE-043 and GB-FE-055) to 31 (GB-FE-035) with an average of 7.9 alleles. GB-FE-035 was the most polymorphic with the highest PIC value 0.93. Major allele frequencies ($M_{AF}$) for the 10 polymorphic loci varied from 0.12 to 0.97 with a mean allele frequency of 0.57. The expected heterozygosity ($H_E$) values ranged from 0.05 to 0.94 with an average of 0.53. The observed heterozygosity ($H_O$) ranged from 0.06 to 0.92 with an average of 0.42. The overall polymorphic information contents (PIC) values ranged from 0.05 to 0.93 with an average of 0.48. The landrace accessions of buckwheat used in the present study were not distinctly grouped according to geographic distribution. The study concludes that the results revealed genetic differentiation was low according to the geographic region because of outcrossing and self-incompatibility. We reported that our analyses on the genetic diversity of common buckwheat cultivars of Korea were performed by using of microsatellite markers.

DESIGN AND IMPLEMENTATION OF MOVING OBJECTS MANAGEMENT SYSTEM APPLYING OPEN GOESPATIAL DATA ENCODING

  • Lee, Hye-Jin;Lee, Hyun-Ah;Park, Jong-Heung
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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    • pp.663-666
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    • 2005
  • The Geography Markup Language (GML) is an XML encoding for the transport and storage of geographic information, including both the geometry and properties of geographic features. This paper uses the GML to provide extendibility and interoperability of spatial data in moving objects management system. Since the purpose of the system is to provide locations of the moving objects in the web and mobile environments, we used the GML both for presenting map data and trajectories of the moving objects. The proposed system is composed of Location Data Interface, Moving Objects Engine, and Web/Mobile Presentation Interface. We utilized the concept of Web Map Server, that is web mapping technology of OGC (Open Geospatial Consortium), to integrate map data and the location information of the moving objects. In the process of the integration, we used the standard data model and interfaces while defining new application schema. Since our suggested system uses open spatial data encoding and interfaces, both extendibility and interoperability are guaranteed.

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GIS를 이용한 우편주소정보 관리시스템 (Postal Address Information Management System with GIS)

  • 장태우;김호연;김용진;박진우
    • 산업공학
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    • 제18권4호
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    • pp.361-369
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    • 2005
  • Postal address information is basis for customer contact channel as well as for the postal logistics such as sorting and dispatching, and the management system has been prepared. It should manage not only address itself but also information of delivery districts and sequences. It is necessary to consider geographic information system (GIS) to be included for intuitive and efficient manipulation. In order to construct a integrative system that could manage and utilize the standardized postal address information, we analyze various user requirements, define required GIS information, and present some results of data and process modeling. In addition, we explain several main functions with screen-shots of the implemented system. The GIS-enabled system, which is constructed after this study, is planned to be used to build and manage a database of nationwide postal addresses. It would make it possible to present other postal information systems with the address information and to provide various customer services.

부경대학교 주변 지역의 지리정보시스템 자료를 이용한 3차원 일조 환경 평가 (Assessment of 3-Dimensional Sunshine Environment Using Geographical Information System Data around Pukyong National University)

  • 김은령;박수진;김재진;남경엽
    • 한국지리정보학회지
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    • 제17권3호
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    • pp.116-131
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    • 2014
  • 본 연구에서는 3차원 지형 지물의 일조 차단 효과를 반영한 일조 모델을 이용하여 도시 지역의 일조 환경을 분석하였다. 기존의 일조 모델은 격자셀 단위로 일조 차단 유무를 판별하기 때문에, 건물이나 지형물 모서리 부분의 일조 유무를 판단 할 때에는 오차가 유발될 수 있었다. 본 연구에서는 기존의 격자셀 단위의 일조 판별 알고리즘을 격자셀의 면 단위로 개선하였다. 개선된 일조 모델과 부산광역시 대연동 일부 지역에 대한 지리정보시스템(Geographic Information System, GIS) 자료를 이용하여 계절별 시간별 일조 환경을 분석하였다. 3차원 지형 자료에 대한 계절별 일조 환경을 분석한 결과, 대상 지역 내에 위치한 아파트 단지, 고층 건물, 지형 등의 영향으로 일조량 변화가 발생하였다.

홍수에 의한 침수 취약지역 예측에 관한 연구 (Application of Geographic Database for Prediction of Flood Vulnerable Area)

  • 황유정
    • 한국지역지리학회지
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    • 제12권1호
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    • pp.172-178
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    • 2006
  • 홍수가 발생했을 때 침수 가능성이 있는 지역에 대한 정확한 예측은 피해를 예방하며 인적.물적 피해를 줄일 수 있다. 이에 관련된 연구에는 지형학적방법, 과거자료를 활용하는 방법, 수리학적 모형을 이용한 방법이 있다. 본 연구는 문산천과 곡릉천을 중심으로 분석한다. 연구지역은 저지대의 넓은 평야로서 홍수에 취약한 지역이다. 과거 홍수자료와 지형정보를 이용 분석했다. 표고가 낮으면서 경사도가 낮은 지역은 홍수에 의한 침수 가능성이 높으므로 선행연구에서 표고 50m 이하의 지역을 침수예측 지역으로 제시했으나, 본 연구의 결과는 고도 10 m 지역범위가 1999년, 1998년 침수지역의 공간적 범위와 더욱 더 일치하며, 경사 분석에서는 경사도 5도 이하 지역의 공간적 범위와 일치함을 나타낸다. 본 연구의 결과는 향후의 도시계획 또는 국토계획에 반영할 수 있으며 현재까지 구축된 다양한 주제도를 활용하여 재해에 보다 효율적으로 대처할 수 있다.

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