• Title/Summary/Keyword: Land Area

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A Study on the Estimation Method of Carbon Storage Using Environmental Spatial Information and InVEST Carbon Model: Focusing on Sejong Special Self-Governing City - Using Ecological and Natural Map, Environmental Conservation Value Assessment Map, and Urban Ecological Map - (환경공간정보와 InVEST Carbon 모형을 활용한 탄소저장량 추정 방법에 관한 연구: 세종시를 중심으로 - 생태·자연도, 국토환경성평가지도, 도시생태현황지도를 대상으로 -)

  • Hwang, Jin-Hoo;Jang, Rae-ik;Jeon, Seong-Woo
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.25 no.5
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    • pp.15-27
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    • 2022
  • Climate change is considered a severe global problem closely related to carbon storage. However, recent urbanization and land-use changes reduce carbon stocks in terrestrial ecosystems. Recently, the role of protected areas has been emphasized as a countermeasure to the climate change, and protected areas allow the area to continue to serve as a carbon sink due to legal restrictions. This study attempted to expand the scope of these protected areas to an evaluation-based environmental spatial information theme map. In this study, the area of each grade was compared, and the distribution of land cover for each grade was analyzed using the Ecological and Nature Map, Environmental Conservation Value Assessment Map and Urban Ecological Map of Sejong Special Self-Governing City. Based on this, the average carbon storage for each grade was derived using the InVEST Carbon model. As a result of the analysis, the high-grade area of the environmental spatial information generally showed a wide area of the natural area represented by the forest area, and accordingly, the carbon storage amount was evaluated to be high. However, there are differences in the purpose of production, evaluation items, and evaluation methods between each environmental spatial information, there are differences in area, land cover, and carbon storage. Through this study, environmental spatial information based on the evaluation map can be used for land use management in the carbon aspect, and it is expected that a management plan for each grade suitable for the characteristics of each environmental spatial information is required.

Evaluation of Pedestrian Space Ion Index by Land Use Type in Heat wave - Focused on ChungJu - (폭염시 토지이용유형별 보행공간 이온지수 평가 - 충주시를 대상으로 -)

  • Yoon, Yong Han;Yoon, Ji Hun;Kim, Jeong Ho
    • Korean Journal of Environment and Ecology
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    • v.33 no.3
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    • pp.354-365
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    • 2019
  • This study measured and analyzed the weather characteristics and the air-ion characteristics of walking space by land use type in Chungju, Chungcheongbuk Province during the heat wave. We used the land registration map to classify the type of land use in walking areas in the studied into the production and green area, the residential area, and the commercial area. We then selected 44 measurement points in about 4.1 km. They included 12 walking space points in the green area, 14 in the residential area, and 18 in the commercial area. Moreover, we calculated the ion index by analyzing the impact of weather factors such as temperature, relative humidity, solar radiation, and net radiation in the walking space on the anion generation and cation generation by land use type during the heat wave. Comparison of air ion characteristics in walking space by type of land use during the heat wave showed that the average cation generation was in the order of commercial area ($700.73cations/cm^3$) > residential area ($600.76cations/cm^3$) > green area ($589.73cations/cm^3$). The average anion generation was in the order of green area ($663.95anions/cm^3$) > residential area ($628.48anions/cm^3$) > commercial area ($527.48anions/cm^3$). The average ion index was in the order of green area (1.13) > residential area (1.04) > commercial area (0.75). This study checked the weather characteristics, cation generation, and anion generation in walking space according to the land use type during the heat wave and checked the difference of ion indexes in the walking space according to the land use type. However, there were limitations in the lack of accurate comparison according to the land use due to the moving measurement and the insufficient quantitative comparison according to the change of road width. Therefore, we recommend further studies that consider the road characteristics.

Forest Management and Forest Resources in Bangladesh

  • Ahmed, Sheikh Ali;Chong, Song-Ho;Chun, Su-Kyoung;Kim, Jong-In
    • Journal of the Korea Furniture Society
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    • v.18 no.2
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    • pp.129-137
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    • 2007
  • Total forest land in Bangladesh is about 2.5 million hectare which is 17% of total land area. Bangladeshi forest is mainly classified into three categories- 1) Hill forest 2) Sal forest and 3) Mangroves. This forest land area is decreasing day by day. But in past decayed due to some policies, the total forest land area is increasing slowly. By this planning both government and the local people in the community are being benefited. This paper mainly discussed about the past, present and future trend of forest condition, forest land uses, sustainable forest planning and forest management.

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Distribution Load Forecasting based with Land-use Estimation (토지용도 추정을 기반으로 한 배전계통 부하예측)

  • Kwon, Seong-Chul;Lee, Hak-Joo;Choi, Byoung-Youn
    • Proceedings of the KIEE Conference
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    • 1999.07c
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    • pp.1481-1483
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    • 1999
  • Power distribution system planning for maximum customer satisfaction and system efficiency requires accurate forecast of future demand in service area. Spatial load forecasting method provides a more accurate estimation of both magnitudes and location of future electrical load. This method considers the causes of load growth due to addition of customers and per capita consumption among customers by land use (residential, commercial and industrial). So the land-use study and it's preference for small area is quite important. This paper proposes land-use preference estimation method based on fuzzy logic. Fuzzy logic is applied to computing preference scores for each land-use and by these scores the customer growth is allocated in service area. An simulation example is used to illustrate the proposed method.

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Crop Field Extraction Method using NDVI and Texture from Landsat TM Images

  • Shibasaki, Ryosuke;Suzaki, Junichi
    • Proceedings of the KSRS Conference
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    • 1998.09a
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    • pp.159-162
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    • 1998
  • Land cover and land use classification on a huge scale, e.g. national or continental scale, has become more and more important because environmental researches need land cover: And land use data on such scales. We developed a crop field extraction method, which is one of the steps in our land cover classification system for a huge area. Firstly, a crop field model is defined to characterize "crop field" in terms of NDVI value and textual information Textual information is represented by the density of straight lines which are extracted by wavelet transform. Secondly, candidates of NDVI threshold value are determined by "scale-space filtering" method. The most appropriate threshold value among the candidates is determined by evaluating the line density of the area extracted by the threshold value. Finally, the crop field is extracted by applying level slicing to Landsat TM image with the threshold value determined above. The experiment demonstrates that the extracted area by this method coincides very well with the one extracted by visual interpretation.

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Extraction of Change of the Urban Area in Seoul from the Satellate (LANDSAT) Data (인공위성(LANDSAT) Data에 의한 서울시에 있어서의 도시역의 변화의 추출)

  • 안철호
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.2 no.1
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    • pp.5-16
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    • 1984
  • This study is about land cover mapping (land use mapping) and change for a period of years in urban area by use of satellite (LANDSAT) data. Definitely, land cover map in 1979 and 1983 of Seoul which has eminant increase of population were produced and change of land cover map for 4 years was considered. The redeveloped software and procedure in this study make it possible to produce land cover maps of urban area in same condition regardless of difference in data acquisition day.

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Consequences of land use change on bird distribution at Sakaerat Environmental Research Station

  • Trisurat, Yongyut;Duengkae, Prateep
    • Journal of Ecology and Environment
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    • v.34 no.2
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    • pp.203-214
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    • 2011
  • The objectives of this research were to predict land-use/land-cover change at the Sakaerat Environmental Research Station (SERS) and to analyze its consequences on the distribution for Black-crested Bulbul (Pycnonotus melanicterus), which is a popular species for bird-watching activity. The Dyna-CLUE model was used to determine land-use allocation between 2008 and 2020 under two scenarios. Trend scenario was a continuation of recent land-use change (2002-2008), while the integrated land-use management scenario aimed to protect 45% of study area under intact forest, rehabilitated forest and reforestation for renewable energy. The maximum entropy model (Maxent), Geographic Information System (GIS) and FRAGSTATS package were used to predict bird occurrence and assess landscape fragmentation indices, respectively. The results revealed that parts of secondary growth, agriculture areas and dry dipterocarp forest close to road networks would be converted to other land use classes, especially eucalyptus plantation. Distance to dry evergreen forest, distance to secondary growth and distance to road were important factors for Black-crested Bulbul distribution because this species prefers to inhabit ecotones between dense forest and open woodland. The predicted for occurrence of Black-crested Bulbul in 2008 covers an area of 3,802 ha and relatively reduces to 3,342 ha in 2020 for trend scenario and to 3,627 ha for integrated-land use management scenario. However, intact habitats would be severely fragmented, which can be noticed by total habitat area, largest patch index and total core area indices, especially under the trend scenario. These consequences are likely to diminish the recreation and education values of the SERS to the public.

A Reconstructive Study on the Urban Structure of the Original Masan in the Colonial Era. (일제강점기 원마산(原馬山)의 도시공간 변천과정 연구 -1912년부터 1945년까지 -)

  • Heo, Jeong-Do;Lee, Kyu-Sung
    • Journal of architectural history
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    • v.11 no.2 s.30
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    • pp.57-74
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    • 2002
  • This study aims at examining the change of the urban space of the original Masan Area during the Japanese-forced colonial era of Korea(1910-1945) after circa 1912. That year is very important because the modern map of land was introduced. The land area of the original Masan was about $17,000m^2$ composed of small houses and shops. Colonial era could be divided into 3 periods according to the change of colonial policies. And the change of the urban space is examined according to these 3 periods. During the 1st period(1911-1920) the following 3 development occurred. 1. Land was reclaimed along the coast line by a Japanese civilian named 'Bakgan'. And his ownership of land continued until 1945. 2. A government ware house(Cho-Chang), which was the symbol of Masan harbor, was demolished and the land was divided into small lots. 3. Main artery and trunk roads(14-15m wide) were built replacing 2-3m wide narrow roads and connected to the reclamation land. During the 2nd period(1921-1930), also land reclamation and road making was more frequently carried out. And the infrastructure of the city was developed gradually. Also public buildings began to be built. Modern roads were constructed city-wide not only in the center of the city. In the 3rd period reclamation was at its peak. Especially Sinpo-Dong area located at the middle of New and original parts of Masan was reclaimed connecting 2 parts and making of a central Masan. During that time original Masan was enlarged because of reclamation. The coast line of Masan became straight from e original organic shape. Roads were constructed in the outskirts also. The size of land lots were more or less the same during the colonial era. But gradually lots were divided into smaller lots. Japanese entrepreneurs gradually occupied the central area of the original Masan until the liberation day. But Chinese ownership of land gradually diminished.

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Analysis of Land Conversion Characteristics in Process of Farmland Loss and Urbanization by Distance from Center of City Using Detailed Digital Land Use - With Representative Big Cities and Their Fringe Areas in Japan - (정밀수치정보를 이용한 도시중심에서 거리별 농지손실 및 도시화과정의 토지전용 특성 분석 - 일본의 대표적 도시주변지역을 중심으로 -)

  • Kim, Dae-Sik
    • Journal of Korean Society of Rural Planning
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    • v.9 no.1 s.18
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    • pp.65-75
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    • 2003
  • As a pre-step research to make land-use planning in the region level, this study aims to analyze some probability pattern representing transition probabilities from farmland to others using the sequential detailed digital land-use maps. Kinki and Chubu regions of Japan, which have Osaka and Nagoya cities as their center places respectively, were selected as test regions in this study. The 10m grid land-use maps for four time series at every 5 year from 1977 to 1992 were used. In this study, the regions were divided into three sub-areas 10km, 20km, and 30km according to distance from center cities, respectively. The correlation coefficient (CC) between sub-areas with same distance in the two regions was calculated to analyze whether or not the two regions have common points in the pattern of land-use conversion probability from farmland to other types. The probability distribution of the converted areas which were moved to the urbanized area (residential, commercial, industrial, road, park and public facility areas) was about $40{\sim}70%$ for both all periods and sub-areas. According to distance from city centers, the probability moved to the urbanized area was about 60% at 10km area, and 40% at the 30km area, which means that the values we decreased gradually, while in the case moved to the forest and the etc areas, the values were increased slightly. The CC analysis from the paddy field and the dry field to the others separately showed that there is high correlation in the probability pattern between the two regions.

Land Development Project Area Underground Facility Management A Plan Using GIS (GIS를 활용한 택지개발사업지구 지하시설물 관리방안)

  • 김감래;이재기;임건혁
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • 2003.10a
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    • pp.329-334
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    • 2003
  • The aim of this study is propriety review for underground facility surveying on development area of land for housing and efficient management. Because of integration information administration system construction of the nation and development of information technology, construction of Urban information system(UIS) to manage systematically city space is increasingly necessary We manage systematically attribute information for each lot in the development area of land lot housing that it Is connected with NGIS in order to drive gradual computerization of underground facilities and arrange the base of facility management. Review arrangement methods on development area of land for housing makes it to check safety accident of urban and to leading base of urban information. Thus, this study draw the most suitable way through analysis of driving methods and expectation effect from above facts.

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