• Title/Summary/Keyword: Geography of Korea

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Utilization Evaluation of Numerical forest Soil Map to Predict the Weather in Upland Crops (밭작물 농업기상을 위한 수치형 산림입지토양도 활용성 평가)

  • Kang, Dayoung;Hwang, Yeongeun;Yoon, Sanghoo
    • Korean Journal of Agricultural and Forest Meteorology
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    • v.23 no.1
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    • pp.34-45
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    • 2021
  • Weather is one of the important factors in the agricultural industry as it affects the price, production, and quality of crops. Upland crops are directly exposed to the natural environment because they are mainly grown in mountainous areas. Therefore, it is necessary to provide accurate weather for upland crops. This study examined the effectiveness of 12 forest soil factors to interpolate the weather in mountainous areas. The daily temperature and precipitation were collected by the Korea Meteorological Administration between January 2009 and December 2018. The Generalized Additive Model (GAM), Kriging, and Random Forest (RF) were considered to interpolate. For evaluating the interpolation performance, automatic weather stations were used as training data and automated synoptic observing systems were used as test data for cross-validation. Unfortunately, the forest soil factors were not significant to interpolate the weather in the mountainous areas. GAM with only geography aspects showed that it can interpolate well in terms of root mean squared error and mean absolute error. The significance of the factors was tested at the 5% significance level in GAM, and the climate zone code (CLZN_CD) and soil water code B (SIBFLR_LAR) were identified as relatively important factors. It has shown that CLZN_CD could help to interpolate the daily average and minimum daily temperature for upland crops.

The Role of Universities in Solving Local and Regional Problems (지역사회 문제해결형 산학협력을 통한 대학의 역할 제고 방안)

  • Jang, Hoo-Eun;Lee, Jong-Ho
    • Journal of the Korean association of regional geographers
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    • v.23 no.3
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    • pp.459-469
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    • 2017
  • Recently, the third mission as the new role of the university is being emphasized as contributing to the local community through active participation in local and regional problems as well as an economic contribution as an entrepreneurial university. Thus, overseas universities started various university-industry collaboration activities targeting sustainable development based on local community and improve their roles for regional regeneration and innovation. Universities in Korea also tend to set up a cooperative governance with various agents in the local community via university financial support projects by the government and started to promote the university-industry collaboration project for solving the problem of the local community. Therefore, this research tries to find implications in order to expand the role and responsibility as local university and reinforce substantiality and enhancement of university-industry collaboration through a case analysis of university-industry collaboration to solve the problem in local communities in foreign countries. In order to solve the problem of local communities based on local agents-led small-sized projects, it is requested to improve the more active role of the university, local governments and university students.

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A Study on Feature Classification and Data Dictionary of Digital Map (수치지도 지형지물 분류체계 개선 및 자료사전에 관한 연구)

  • 조우석;이동구;윤영보
    • Spatial Information Research
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    • v.10 no.3
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    • pp.455-468
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    • 2002
  • Toward the systematic and efficient management of national land, National Geography Institute(NGI, National mapping agency) has been producing national basemap in automated process since middle of 1980's. Under the National Geographic Information System(NGIS) Development Plan, NGI began to produce digital maps in the scales of 1:1,000, 1:5,000, 1:25,000 since 1995. However, those of digital maps that have been generated under NGIS Development Plan need to be modified and corrected due to lack of technology and experience in making digital maps. In this context, those digital maps generated are currently in great need for improving the data dictionary. It is fully appreciated in previous research that data dictionary will be a key element far users and generators of digital maps to rectify the existing problems in digital maps as well as to maximize the application of digital maps. In this paper, we analyzed existing problems in digital maps based on previous researches and interviews with engineers in different fields of geospatial engineering. And then, the existing data dictionary has been redefined and modified. In the line of modification process, a relational matrix was established fur each topographic feature defined in the existing feature classification system. This paper presents newly proposed data dictionary which conforms to newly defined feature classification system from previous research performed by NGI.

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A Study on the Web Mapping Method and Application of the Topographic Information in an Open Environment (개방환경에서 지형정보의 웹지도화 방법과 적용에 관한 연구)

  • Kim, Nam-Shin
    • Journal of the Korean association of regional geographers
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    • v.13 no.5
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    • pp.563-575
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    • 2007
  • This study aims to investigate a possibility of using topographic information by web mapping in open environments. Web mapping intends to focus on a map analysis and application of the function and geo-visualization. Functions of Web topographic info-map include a spatial analysis, enlargement and minimization, movement, landuse information, user-controling 3 dimension map, landform cross-section analysis, shortest path analysis. The web system adopts SVG(scalable vector graphics), MYSQL, PHP, XML for mapping. SVG has open source policy, so everyone can use it, as well, it is effective on flexible database linkage, cartographic representation. 3D map is intended to represent 3D map by user-controlled sunshine putting pixel opacity by elevation values after making DEM. Landform is designed to show a cross-section analysis and statistics by retrieving height information from database engine with clicking two points on the map. Shortest path analysis within regions uses Dijkstra's algorithm. Near future, resultantly, the area of WebGIS will have to meet more social demands for use-created geo-information and application, so more researches are needed to be web mapping more applicable for users.

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A Study on Cost-Benefit Analysis for Geographic Information (국토지리정보의 비용편익(B/C) 분석)

  • Kim, Kye-Hyun;Park, Hong-Gi;Kim, Kwang-Ju;Choi, Hoon-Sung;Song, Yong-Cheol;Park, Tae-Og
    • Journal of Korean Society for Geospatial Information Science
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    • v.10 no.4 s.22
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    • pp.85-93
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    • 2002
  • Since the National Geographic Information System(NGIS) project of 1995, the geographic information projects have been promoted in various areas such as central and local governments. In the fact that large scale budget has been invested to geographic information projects as a national policy, the cost-benefit analysis would be essential to enhance the efficiency of the resource allocation. In this circumstance, this study analyzes the costs and benefits of geographic information produced by NGI(National Geography Institute). As a result of the cost-benefit analysis, the total amount of benefits were estimated approximately 620 million dollars and the accumulated ratio of the cost to benefit was 1 to 4.4. Also, the internal ratio of the benefit was 38%, which justified the large scale investment. In case of adding qualitative benefits which can not be measured in a quantitative term, the overall benefits from using such geographic information would be much higher than quantitative benefits. Further research work is required for more objective verification of the large scale national project such as building nationwide geographic information.

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A Study on the Characteristics and Utilization Measures of Rock Formations in the Romantic Road in the Eastern Coast of Korea (동해안 낭만가도의 바위지형경관 특성과 활용방안)

  • Kwon, Dong Hi
    • Journal of the Korean Geographical Society
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    • v.48 no.6
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    • pp.803-818
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    • 2013
  • In this study, a total of 80 rock formations in the romantic road(Nangmangado) were investigated and analyzed and the results are as follows. The area in where the rock formations landscape is seen the most is Yangyang(43 formations), and the formations are most densely concentrated in Jukdo beach when seen from the site group. The most observed landform is weathering landform(61%) and the rest is comprised of coastal landform(24%) and structural landform(15%). For weathering landform, Tafoni takes up the largest portion (33%) and is followed by Corestone(27%), Tor(22%), Gnamma(10%), Groove(4%) and Exfoliation(4%). Considering academic value, rarity and accessibility overall, the 35 landforms are expected to have high utility value as tourism resources and topography filed course. And out of these 35 landforms, 11 are concentrated in Dongsan beach in Yangyang. Therefore, it seems worthy to consider developing Dongsan beach under the name of "Dongsan Coast Rock Park(Tentative Name)" to be actively utilized as tourism resources. The landforms which are evaluated as highly valuable for geomorphology filed course are a total of 16 areas including Fan rock and Op rock formations. In these areas, typical weathering landforms are concentrated in one spot and two or three other types of landform can also be additionally observed, allowing the place to be highly efficient for field education.

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The Spread Effect of the 'Cheongdo Bull-Fighting Festival' upon the Regional Tourism Industry in Cheongdo-Gun (청도 소싸움 축제의 지역관광 활성화에 대한 파급효과)

  • Lee, Jae-Ha;Bae, Ki-Hak
    • Journal of the Korean association of regional geographers
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    • v.10 no.3
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    • pp.624-641
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    • 2004
  • Since 1995, when local autonomy policies were enacted in Korea, many local governments have adopted festival-centered place-marketing strategies, in order to develop their regional economies by attracting tourists, as well to provide the general public with information about local comparative advantages. This study assesses the spread effect of the Cheongdo Bull-Fighting Festival upon the regional tourism industry, by analysing questionnaire data obtained from festival visitors and merchants at other major tourist attractions in the area. It is concluded that the Cheongdo Bull-Fighting Festival has been insufficient in attaining the objective of developing the regional economy and the tourism industry, because at present, most of the festival spectators are not tourists as such, but rather residents of the Cheongdo daily community (Daegu metropolitan area), and they do not visit other major tourist attractions in conjunction with attending the festival. It is recommended that planning authorities adopt a strategy explicitly designed to increase the "tourists to local residents" ratio, and to improve tourism services to facilitate intra-regional movement of tourists and visitors alike.

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Can Housing Prices Be an Alternative to a Census-based Deprivation Index? An Evaluation Based on Multilevel Modeling (주택가격이 센서스에 기반한 박탈지수의 대안이 될 수 있는가?: 다수준 모델에 기반한 평가)

  • Sohn, Chul;Nakaya, Tomoki
    • Journal of Cadastre & Land InformatiX
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    • v.48 no.2
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    • pp.197-211
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    • 2018
  • We conducted this research to examine how well regional housing prices are suited to use as an alternative to conventional census-based regional deprivation indices in health and medical geography studies. To examine the relative performance of mean regional housing prices compared to conventional census-based regional deprivation indices, we compared several multilevel logistic regression models, where the first level was individuals and the second was health districts in the Seoul Metropolitan Area (SMA) in Korea, for the sake of adjusting the regional clustering tendency of unknown factors. In these models, we predicted two dichotomous variables that represented individuals' after-lunch tooth brushing behavior and use of dental floss by individual characteristics and regional indices. Then, we compared the relative predictive performance of the models using the Akaike Information Criterion (AIC) and Bayesian Information Criterion (BIC). The results from the estimations showed that mean regional housing prices and census-based deprivation indices were correlated with the two types of dental health behavior in a statistical sense. The results also revealed that the model with mean regional housing prices showed smaller AIC and BIC compared with other models with conventional census-based deprivation indices. These results imply that it is possible for housing prices summarized using aerial units to be used as an alternative to conventional census-based deprivation indices when the census variables employed cannot properly reflect the characteristics of the aerial units.

Evaluating Local Economic Development Policy and Suggesting Some Policy Alternatives: the Case of Goryeong County, Korea (고령군의 지역경제 실태와 정책 과제)

  • Lee, Jong-Ho
    • Journal of the Korean association of regional geographers
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    • v.14 no.6
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    • pp.664-679
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    • 2008
  • This paper attempts to evaluate the local economy and the local economic development policy in Goryeong County and to propose some policy alternatives for local economic development. Goryeong County has a locational advantage, which is not just geographically proximate to Daegu, a large metropolis, but also connected directly to the national highway networks. This region can also be regarded as a rural area, in a sense that the primary industry still plays a more important role for the local economy than the secondary industry and the tertiary industry. However, it is problematic that the local economic development strategies of Goryeong are universal rather than strategic and systematic. In order to design an effective regional economic development policy, the policy makers are necessary to deliberately consider regional specificity and geo-political and geo-economic situations around the region. In addition, it is important to say that policy makers, particularly in rural regions, need to break from the fantasy of high-tech industries. In this context, I propose some region-specific and context-specific policy ideas, including the promotion of the agro-food cluster and the build-up of the em-industrial complexes specialized in mechatronics and transportation equipment manufacturing.

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Non-point Source Critical Area Analysis and Embedded RUSLE Model Development for Soil Loss Management in the Congaree River Basin in South Carolina, USA

  • Rhee, Jin-Young;Im, Jung-Ho
    • Spatial Information Research
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    • v.14 no.4 s.39
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    • pp.363-377
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    • 2006
  • Mean annual soil loss was calculated and critical soil erosion areas were identified for the Congaree River Basin in South Carolina, USA using the Revised Universal Soil Loss Equation (RUSLE) model. In the RUSLE model, the mean annual soil loss (A) can be calculated by multiplying rainfall-runoff erosivity (R), soil erodibility (K), slope length and steepness (LS), crop-management (C), and support practice (P) factors. The critical soil erosion areas can be identified as the areas with soil loss amounts (A) greater than the soil loss tolerance (T) factor More than 10% of the total area was identified as a critical soil erosion area. Among seven subwatersheds within the Congaree River Basin, the urban areas of the Congaree Creek and the Gills Creek subwatersheds as well as the agricultural area of the Cedar Creek subwatershed appeared to be exposed to the risk of severe soil loss. As a prototype model for examining future effect of human and/or nature-induced changes on soil erosion, the RUSLE model customized for the area was embedded into ESRI ArcGIS ArcMap 9.0 using Visual Basic for Applications. Using the embedded model, users can modify C, LS, and P-factor values for each subwatershed by changing conditions such as land cover, canopy type, ground cover type, slope, type of agriculture, and agricultural practice types. The result mean annual soil loss and critical soil erosion areas can be compared to the ones with existing conditions and used for further soil loss management for the area.

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