• Journal of the Korean Association of Geographic Information Studies
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• v.18 no.1
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• pp.48-63
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• 2015

In this study, we introduce various hyperspectral data processing techniques for the monitoring of shallow and coastal waters to enlarge the application range and to improve the accuracy of the end results in Korea. Unlike land, more accurate atmospheric correction is needed in coastal region showing relatively low reflectance in visible wavelengths. Sun-glint which occurs due to a geometry of sun-sea surface-sensor is another issue for the data processing in the ocean application of hyperspectal imagery. After the preprocessing of the hyperspectral data, a semi-analytical algorithm based on a radiative transfer model and a spectral library can be used for bathymetry mapping in coastal area, type classification and status monitoring of benthos or substrate classification. In general, semi-analytical algorithms using spectral information obtained from hyperspectral imagey shows higher accuracy than an empirical method using multispectral data. The water depth and quality are constraint factors in the ocean application of optical data. Although a radiative transfer model suggests the theoretical limit of about 25m in depth for bathymetry and bottom classification, hyperspectral data have been used practically at depths of up to 10 m in shallow and coastal waters. It means we have to focus on the maximum depth of water and water quality conditions that affect the coastal applicability of hyperspectral data, and to define the spectral library of coastal waters to classify the types of benthos and substrates.

• Journal of the Korean Geographical Society
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• v.47 no.3
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• pp.426-439
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• 2012

The goal of this study is to propose a new method to capture the qualitative person spatial behavior. Beyond tracking or indexing the change of the location of a person, the changes in the relationships between a person and its environment are considered as the main source for the formal model of this study. Specifically, this paper focuses on the movement behavior of a person near the boundary of a region. To capture the behavior of person near the boundary of regions, a new formal approach for integrating an object's scope of influence is described. Such an object, a spatio-temporally extended point (STEP), is considered here by addressing its scope of influence as potential events or interactions area in conjunction with its location. The formalism presented is based on a topological data model and introduces a 12-intersection model to represent the topological relations between a region and the STEP in 2-dimensional space. From the perspective of STEP concept, a prototype analysis results are provided by using GPS tracking data in real world.

• Proceedings of the Korea Water Resources Association Conference
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• 2007.05a
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• pp.1844-1848
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• 2007

본 연구에서는 섬진강유역에 위치한 주요 수위관측소 지점의 유출률을 산정하기 위해서 지리정보시스템(Geographic Information System : GIS)을 적용하였다. 유출률 산정에 이용된 GIS 소프트웨어로는 ArcInfo와 ArcView 등을 이용하였으며, 대상유역의 수치유역도, 강우관측망도, 수위관측망도, 수계망도, 주암댐 유역도, 섬진강댐 유역도, 순유역도 등을 일차적으로 생성하였다. 또한 수치표고모델(Digital Elevation Model : DEM), 토양도, 토지피복도, 유출곡선지수도(Curve Number : CN) 등의 기본도를 생성하였다. 일반적으로 미계측 유역에서의 유출률 산정은 강우모형과 유역모형, 하도모형 등에 의한 수문학적 방법으로 산정되나, 계측 유역은 수위관측소 지점의 수위-유량관계곡선식에 의해 수위 수문곡선을 유량 수문곡선으로 변환하여 산정하게 된다. 본 연구에서는 수위-유량관계곡선식에 의하여 유출수문곡선을 산정하였으며, 또한 산정된 유출률의 적정성을 파악하기 위해 GIS를 이용하여 산정한 CN의 값과 비교하였다. 본 연구는 섬진강유역을 대상으로 하는 유출률 산정에 관한 연구로 강우량자료의 일관성 분석 등도 수행하였다. 유출률 산정에 이용된 강우자료는 기상청 자료이며 평균 강우량은 강우의 시간적 분포와 강우량의 양적분포 등을 분석한 후 산술평균법에 의해 산정하였다.

• Economic and Environmental Geology
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• v.42 no.3
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• pp.273-282
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• 2009

To render more valuable information, a spatial database is being constructed from digitalized maps in the geographic areas. Transferring file-based maps into a spatial database, facilitates the integration of larger databases and information retrieval using database functions. Geological mapping is the graphical interpretation results of the geological phenomenon by geological surveyors, which is different from other thematic maps produced quantitatively. These features make it difficult to construct geologic databases needing geologic interpretation about various meanings. For those reasons, several organizations in the USA and Australia are suggesting the data model for the database construction. But, it is hard to adapt to a domestic environment because of the representation differences of geological phenomenon. This paper suggests the data model adaptive in domestic environment analyzing 1:50,000 scales of geologic maps and more detailed mine geologic maps. The suggested model is a logical data model for the ArcGIS GeoDatabase. Using the model it can be efficiently applicable in the 1:50,000 scales of geological maps. It is expected that the geologic data model suggested in this paper can be used for integrated use and efficient management of geologic maps.

• Journal of the Korean earth science society
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• v.21 no.6
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• pp.719-733
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• 2000

Normally, a digital geologic map can be defined as mappable one whose spatial information with geographic information details and geologic database attribute, recorded in a digital format that is readable by computer. It shows fundamentally two different conceptual perspectives: cartography for digital mapping and analysis for geo-data processing. While, as both aspects basically relate to natural entities and their interpretation of complex features fused with multi-sources, digital geo-data mapping or geologic mapping, it should be distinguished from digital mapping in engineering such as UIS(Urban Infomation System) and AM/FM(Automated Mapping/Facilities Management). Furthermore, according to short-cycled development of GIS(Geographic Information System) software architecture based on IT(Information Technology) and wide expansion of GIS applications' fields, the importance of domain analysis and application model is emphasized at digital geologic informatizaion. In this paper, first terms and concepts of geo-data model with general data modeling aspects are addressed, and then case histories for geo-data modeling and several approaches for data modeling in GIS application fields are discussed. Lastly, tentative conceptual geo-data modeling by using UML(Unified Modeling Language) of OO(Object-oriented) concepts with respect to USGS/AASG geo-data mode is attempted. Through this approach, the main benefits for standardization and implementation lineage with conceptual model in consideration to reusability are expected. Conclusively, it is expected that geo-information system and its architecture by UML is the new coming key approach for the GIS application in geo-sciences.

• Journal of the Economic Geographical Society of Korea
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• v.19 no.1
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• pp.122-142
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• 2016

This paper examines the implications of North Korea's Special Economic Zone (SEZ) strategy since the early 1990s in terms of the shifts in both North Korea's economic system and geopolitical order on the Korean peninsula. Specifically, it analyzes the shifts in North Korea's SEZ policy in three different aspects-North Korea's unique territorial logic, stress on decentralization, and comparison with Chinese reform and opening-up. Based upon this analysis, this paper criticizes a linear approach to understand North Korea's economic transformation from isolation to opening-up, and explores the dynamics of North Korea SEZ strategy in various dimensions. It contends that North Korea's SEZ strategy is neither an inevitable choice from economic difficulty nor an adoption of Chinese model of reform and opening up. Rather this paper focuses on the geopolitical logic and local development imperatives underlying SEZ strategy.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.27 no.1
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• pp.713-722
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• 2009

Gravity measurement can determine the earth gravitational field, also is the fundamental to the research of earth gravitational field, geodesy and geodynamic, vertical movement of the crust, geoid surface, sea level and climate etc. Recently, National Geographic Information Institute (NGII) introduced FG-5 absolute gravity meter in order to lay a foundation for establishment of Absolute Gravity Network, and furthermore NGII plan to construct about 1,200 multi dimensional and function Unified Control Points(UCP) in nationwide. It will play an important role in development of high accuracy geoid model in South Korea. This paper explains the fundamental theory and method of relative gravity measurement, surveys the relative gravity of 21 stations using latest Scintrex CG-5 relative gravimeter. In addition, it calculates gravity values, compare and analysis gravity survey results using datum-free adjustment and weighted constraint adjustment. The results indicate show that datum-free and weighted constraint adjustment methods are available to determine high accuracy gravity achievement, datum-free method is more advantage than weighted constraint adjustment.

• Proceedings of the Korea Water Resources Association Conference
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• 2007.05a
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• pp.1076-1080
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• 2007

최근 국내에서는 하천변 생태계를 대상으로 생태구조 및 서식처 평가 등 많은 연구가 진행되었음에도 불구하고 생태적 변화를 예측하고 예측된 결과에 따라 생태복원 대책을 수립할 수 있는 연구는 현재까지 미흡하다고 볼 수 있으며, 이는 생태복원 연구에 있어 주요과제라고 할 수 있다. 이에 반해 유럽과 미국에서는 수문학적 서식처 조건에 따른 식생 반응 예측 등 수문생태 모형에 대한 연구가 꾸준히 이루어져 왔으며, 최근에는 습지, 홍수터 등을 대상으로 생태보전 복원분야에 널리 응용되고 있다. 본 연구에서는 국외의 수문생태모형 적용사례를 분석하여 국내 적용가능성 및 문제점에 대한 타당성을 제시하고자 하였다. 그 대상으로는 유역 내에 홍수량 분담을 위한 천변저류지를 적용하였으며, 의미상으로 홍수터(범람원), 습지 역시 해당 범위에 포함할 수 있다. 천변저류지는 홍수기와 비홍수기에 따라 활용 측면을 구분할 수 있으며, 이런 맥락에서 천변저류지의 수위변화는 식생 변화의 중요한 요소(factor)가 될 수 있다. 그 외 범람시기, 범람일수, 건조기간 등을 포함한 수문요소 역시 수문생태 모델의 예측 변수인 식생 성장에 영향을 미치게 된다. 이러한 수문/생태시스템의 상호관계를 활용하고 모형의 형태를 국내 식생에 대한 생리학적 특성에 맞게 변화시킬 수 있다면 국내 천변저류지에도 충분히 적용 가능할 것으로 판단된다. 또한 잠재적으로 식생 성장에 영향을 줄 수 있는 다양한 환경조건 예를 들면 영양물질, 토양구조, 토사 퇴적 등을 적용대상지 환경에 맞게 포함하거나 고려할 수 있다면 모형의 재현성을 더욱 높일 수 있을 것이다.의 기대효과를 가져올 수 있으리라 생각되며 분석된 인자들은 수달 서식지를 위한 하천정비의 기초자료에 유용할 것으로 보인다.따른 유량측정망을 구축하는 것이다.의 의사결정 지원 도구가 될 것이다. 따라서, 본 연구에서는 도시유역의 물순환 해석을 위한 일련의 과정, 즉 자료의 조사 및 취득에서부터 물순환 해석 모형을 이용한 정량적 현황파악, 물순환 개선 기법 및 평가를 수행함에 있어 주요 착안점 및 실무에서의 기술적 가이드를 제공하고자 하였으며, 보다 세밀한 도시유역의 물순환 해석을 위하여 우리나라와 일본에서 적용이 활발한 물리적 기반의 분포형 모형(WEP, SHER, SWMM)의 적용사례를 통하여 국내 도시하천의 물순환 해석에 활용함에 있어서의 실질적인 적용절차 등을 제시하고자 하였다. 한다.호강유역의 급격한 수질개선을 알 수 있다.世宗實錄) $\ulcorner$지리지$\lrcorner$(地理志)와 동년대에 동일한 목적으로 찬술되었음을 알 수 있다. $\ulcorner$경상도실록지리지$\lrcorner$(慶尙道實錄地理志)에는 $\ulcorner$세종실록$\lrcorner$(世宗實錄) $\ulcorner$지리지$\lrcorner$(地理志)와의 비교를 해보면 상 중 하품의 통합 9개소가 삭제되어 있고, $\ulcorner$동국여지승람$\lrcorner$(東國與地勝覽) 에서는 자기소와 도기소의 위치가 완전히 삭제되어 있다.

• Journal of the Korean Association of Geographic Information Studies
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• v.6 no.1
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• pp.59-77
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• 2003

This study is to validate the use of macro language for the land suitability analysis aiming to help to resolve land use conflicts. The silver-town suitability analysis is conducted on the Geejang Gun, Busan Metropolitan city. Such digital maps as terrain, road, facility, and water body were created for various cartographic models. A cartographic model identified the best suitable areas for silver-town development based on the such site selection variables as a distance to facility and road, slope and aspect of terrain, land use etc. Then, the other cartographic model identified the most favorable site among the candidate sites based on the comparison of the aspect of proximity, usage and environmental quality. Macro language was used for these modeling process and was used for the manipulation of all these spatial variables used in the models to resolve land use conflicts relating to the decision making process of the final site selection. This study will improve the effectiveness and rationality of the traditional site suitability analysis.

• Journal of the Korean Association of Geographic Information Studies
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• v.7 no.1
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• pp.84-93
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• 2004

Recently, domain-specific demands with respect to practical applications and analysis scheme using spatial thematic information are increasing. Accordingly, in this study, GIS-based application program is implemented to perform spatial analysis in transportation geography with base road layer data. Using this program, quantitative estimation of circuity and accessibility, which can be extracted from nodes composed of the graph-typed network structure, in a arbitrary analysis zone or administrative boundary zone is possible. Circuity is a concept to represent the difference extent between actual nodes and fully connected nodes in the analysis zone. While, accessibility can be used to find out extent of accessibility or connectivity between all nodes contained in the analysis zone, judging from inter-connecting status of the whole nodes. In put data of this program, which was implemented in AVX executable extension using AvenueTM of ArcView, is not transportation database information based on transportation data model, but layer data, directly obtaining from digital map sets. It is thought that computation of circuity and accessibility can be used as kinds of spatial analysis functions for GIS applications in the transportation field.