• 농촌계획
• /
• 제23권1호
• /
• pp.21-29
• /
• 2017

The purpose of this study is to analyze the accuracy of cultivated crop database in agricultural farm business using UAV(Unmanned Aerial Vehicle) and field survey over Daesso-myeon, Umsung-gun, Chungbuk. When comparing with agricultural farm business and cadastral maps, Daeso-myeon crop field shows 29.8%(2,030 parcels out of 6,822 parcels) is either mismatched or missing. It covers almost 19.3%($3.4km^2$ of $17.6km^2$) of total farmland. In order to solve these problems, it is necessary to prepare a multifaceted plan including cadastral map. Comparative analysis of the cultivated crop registered in the agricultural farm business and the field survey agreed only in 3,622 parcels in total 6,822 parcels whereas 3200 parcels disagree. Among these disagreed parcels 2,030(29.8%) have been confirmed as unregistered farm business entity. Accuracy of cultivated crop registered in agricultural farm business agreed in 75.6% cases. Especially the paddy field registration is more accurate that other crops. These discrepancies can lead to false payment in agricultural farm business. For exploration and analysis of regional resources, UAV images can be used together with farm business management database and cadastral map to get a clearer grasp over on-site resources and conditions.

• 대한공간정보학회지
• /
• 제22권3호
• /
• pp.31-37
• /
• 2014

'전' 지목 필지의 공시지가는 농지의 생산성을 반영하는 자연조건이 정량화되지 못한 채 감정평가사의 주관적 판단에 의거하여 산정되어 왔다. 특히 일사량의 경우 농산물의 생산속도, 생산량, 질을 결정하는 핵심변수이지만 고려되지 않고 있다. 본 연구에서는 GIS기반 일사량 시뮬레이션을 활용하여 농지 중 '전' 지목의 현행공시지가와 일사량 간의 관련성을 분석하였다. 그 결과 일사량이 높은 지역임에도 불구하고 공시지가가 낮게 나타나고, 일사량이 낮지만 공시지가가 높게 나타나는 사례가 상당히 많음을 확인하였다. 본 연구가 농지의 공시지가 산정과정에서 있어 객관적인 데이터에 의거한 가격결정이 아닌 직관에 의존하여 왔던 관행을 개선될 수 있는 계기가 되어 향후 전 지목에 대한 감정평가에서 기술적인 측면이나 정책적인 측면에서 중요한 참고자료가 될 수 있을 것으로 사료된다.

• 한국농공학회논문집
• /
• 제58권5호
• /
• pp.29-37
• /
• 2016

Unmanned Aerial Vehicle (UAV) have several advantages over conventional remote sensing techniques. UAV can acquire high-resolution images quickly and repeatedly with a comparatively lower flight altitude i.e. 80~400 m nullifying the effect of extreme weather and cloud. This study discussed the use of low cost-effective UAV based remote sensing application in inspection of agricultural subsidy. The study area accrue $60.5km^2$ of Buljeong-myeon, Goesan-gun, Chungbuk in South Korea. UAV image acquired 25 times from July 25 to August 11, 2015 for 3 days. It is observed that almost 81.1 % (3,571 of 4,410 parcels) parcels are truthful whereas some parcels are incorrect or fraudulent. Surveying with UAV for agricultural subsidy instead of field stuff can reduce the required time as much as 64.8 % (19 of 54 days). Therefore, it can contribute significantly in speedy and more accurate processing of grant application and can end unfair receipt of the grant which in turn will improve customer satisfaction.

• 한국농공학회논문집
• /
• 제62권6호
• /
• pp.21-31
• /
• 2020

This study analyzed the spatio-temporal change pattern of greenhouse areas for Sangnam-myeon and Samrangjin-eup of Miryang-si in Gyeongnam, which is one of major greenhouse area. First, in order to overcome the lack of statistical data of the distribution of greenhouses, aerial and satellite images were interpreted from 1987 to 2018, and the spatial distribution of the greenhouse parcels which has continuously increased was mapped based on the digital cadastral map. Next, through the emerging hot spot tool in ArcGIS Desktop, the spatio-temporal change in transition from open-field to greenhouse cultivation was classified into 9 clusters. About 67.7% of the target area was categorized as a hot spot, and the pattern of New hot spot, which were recently converted to greenhouse parcels, covered about 34.1%. While, about 11.3% of parcels were expected to keep the existing open-field cultivation practice for a while. Overall, the greenhouse parcels have been densely developed along a river and were lately expanding even to the far neighbor. It implied that, in the future, the competition of water intake among farms would be more serious and the environmental responsibility in consideration of water quality as well as quantity would be getting strengthened due to increasing pollution loads and river intake.

• 대한원격탐사학회지
• /
• 제28권6호
• /
• pp.653-660
• /
• 2012

This study classified paddy fields according to rice varieties and monitored temporal changes in rice growth using SAR backscatter coefficients (${\sigma}^{\circ}$). A growing period time-series of backscatter coefficients was set up for nine fine-beam mode RADARSAT-1 SAR images from April to October 2005. The images were compared with field-measured rice growth parameters such as leaf area index (LAI), plant height, fresh and dry biomass, and water content in grain and plants for 45 parcels in Dangjin-gun, Chungnam Province, South Korea. The average backscatter coefficients for early-maturing rice varieties (13 parcels) ranged from -18.17 dB to -6.06 dB and were lower than those for medium-late maturing rice varieties during most of the growing season. Both crops showed the highest backscatter coefficient values at the heading stage (late July) for early-maturing rice, and the difference was greatest before harvest for early-maturing rice. The temporal difference in backscatter coefficients between rice varieties may play a key role in identifying early-maturing rice fields. On the other hand, comparisons with field-measured parameters of rice growth showed that backscatter coefficients decreased or remained on a plateau after the heading stage, even though the growth of the rice canopy had advanced.

• 농촌계획
• /
• 제25권3호
• /
• pp.37-44
• /
• 2019

The value of Jeju Batdam has been reexamined as it is listed as a nationally important agricultural heritage and globally important agricultural heritage systems. However, it is already exposed to threats such as reduction of agricultural population and cultivation area. Despite efforts like the agricultural heritage system to preserve traditional agriculture, there is few basic investigation into the current status of Jeju Batdam. The purpose of this study is to estimate the length of Jeju Batdam. We used the continuous cadastral map of Jeju area to extract the boundaries of the field lot. In the cadastral map, the farmland was selected by selecting dry fields, paddy fields and orchards. 300 sample site were selected from the extracted farmland, and the boundaries between the Internet map and the parcels were superimposed and the differences were confirmed on the drawing. After that, field survey was conducted to confirm the boundary of the parcels and the existence of actual Batdam. It is estimated that the length estimated from this study is at least 23,983km and maximum 142,353km, which is at least 1,830km longer than 22,108km announced in 2007. Since Jeju Batdam is based on land parcel boundary, it is an objective and efficient method to utilize intellectual information. In addition, because it is subordinate to farmland, new information can be extracted reflecting the change of land use and make the spatial database based on the cadastral maps.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
• /
• pp.243-245
• /
• 2007

This study was begun to classify the paddy fields by the rice varieties and to monitor the temporal change in rice growth using SAR backscatter coefficients $({\sigma}^{circ})$. For nine fine-beam mode images of Radarsat-1 SAR, a growing period time-series of backscatter coefficients was set up from April to October in 2005, and was compared with the field-measured rice growth parameters such as LAI (leaf area index), plant height, fresh and dry biomass, and water content in grain and plant for 45 parcels in Dangjin-gun, Chungcheongnam Province, South Korea. The average backscatter coefficients for early-maturing rice varieties (13 parcels) were ranged from -18.17dB to -6.06dB and were lower than for medium-late maturing rice varieties during most of the growing season. At around the heading stage (July 30) for early-maturing rice, both rice crops showed the highest backscatter coefficient values and the difference was the greatest before harvesting early-maturing rice. The temporal difference in backscatter coefficients between rice varieties was expected to play a key role to identify early-maturing rice fields. On the other hand, comparison with field-measured rice growth parameters showed that the backscatter coefficients decreased or stayed on the plateau after heading stage even though the growth of rice canopy advanced.

• 한국농공학회논문집
• /
• 제65권5호
• /
• pp.69-80
• /
• 2023

Carbon neutrality in agriculture can be derived from systematic GHG reduction policies based on quantitative environmental impact analysis of GHG-emitting activities. This study is to explore how to advance the calculation of carbon emissions from agricultural activities to the detailed spatial level to a spatial Tier 3 level (Tier 2.5 level), methodologically beyond the Tier 2 approach. To estimate the GHG emissions beyond the Tier 2.5 level by region for detailed spatial units, we constructed available activity data on carbon emission impact factors such as rice cultivation, agricultural land use, and livestock. We also built and verified detailed data on emission activities at the field level through field surveys. The GHG emissions were estimated by applying the latest national emission factors and regional emission factors according to the IPCC 2019 GL based on the field-level activity data. This study has significance that it explored ways to build activity data and calculate GHG emissions through statistical data and field surveys based on parcels, one of the smallest spatial units for regional carbon reduction strategies. It is expected that by utilizing the activity data surveyed for each field and the emission factor considering the activity characteristics, it will be possible to improve the accuracy of GHG emission calculation and quantitatively evaluate the effect of applying reduction policies.

• 한국측량학회지
• /
• 제35권6호
• /
• pp.535-544
• /
• 2017

무인항공기는 크게 고정익과 회전익으로 구분되며, 이들 두 기종은 촬영 시 비행특성이 매우 상이하여 촬영된 영상과 성과물의 품질에 큰 영향을 미친다. 본 연구에서는 농경지를 대상으로 고정익은 고도 130m, 260m, 회전익은 고도 130m에서 각각 촬영된 영상의 외부표정요소를 계산하여 카메라의 회전각 변화를 비교 분석하였다. 아울러 연구대상지역 내의 두 필지를 대상으로 무인항공사진측량과 지적현황측량에 의한 필지경계 측량의 정확도를 비교하였다. 연구결과 130m 동일 고도에서 촬영한 고정익과 회전익 영상의 회전각의 차이는 매우 큰 반면, 필지경계 측량의 연결교차는 RMSE가 ${\pm}0.075m$ 내외로 거의 동일하였다. 하지만 고정익으로 260m고도에서 촬영한 영상의 경우 연결교차의 RMSE는 ${\pm}0.099{\sim}0.136m$로 변동 폭이 다소 커지는 현상을 보여주었다. 또한 동일 필지를 대상으로 무인항공정사영상에 의한 면적은 지적현황측량의 결과와 비교하여 오차가 0.2% 미만으로 도출되어 무인항공사진측량의 지적측량 관련 분야에서의 높은 활용 가능성을 보여주고 있다.

• 한국토양비료학회지
• /
• 제29권4호
• /
• pp.342-346
• /
• 1996

가리비료(加里肥料)의 시비(施肥)수준이나 퇴비(堆肥) 및 퇴비 계분병용여부(鷄糞倂用與否)에 따른 밭토양(土壤) 치환성가리함량(置換性加里含量)의 장기변동양상(長期變動樣相)을 구명(究明)하기 위하여 고평통(高坪統) 토양(土壤)에서 치환성가리함량(置換性加里含量)이 각각(各各) 1.68, $1.13cmol^+/kg$인 두 필지(筆地)를 선정하여 포장에서 고추를 연작(連作)으로 3년간 재배(栽培)한 시험결과(試驗結果)에서 갈이흙중의 치환성가리함량(置換性加里含量) 변동양상(變動樣相)을 조사연구(調査硏究)한 결과(結果)는 다음과 같다. 1. 고추재배후(裁培後) 토양중(土壤中) 치환성가리함량(置換性加里含量)은 시험전(試驗前) 토양(土壤)의 가리함량(加里含量)이 $1.68cmol^+/kg$이었던 토양(土壤)은 가리기준(加里基準) + 퇴비(堆肥) > 가리기준(加里基準) + 계분(鷄糞) > 가리기준량(加里基準量) > 퇴비(堆肥) > 가리기준량(加里基準量) > 무가리(無加里) 순으로 많았고, 시험전(試驗前)과 토양(土壤)의 가리함량(加里含量)이 전국 고추재배(栽培) 토양(土壤)의 평균함량(平均含量) $1.07cmol^+/kg$과 유사한 $1.13cmol^+/kg$ 이었던 토양(土壤)은 가리기준(加里基準)+퇴비(堆肥) > 가리기준(加里基準)+계분(鷄糞) > 가리기준량(加里基準量) > 가리기준반량(加里基準半量) > 퇴비(堆肥) > 무가리(無加里) 순으로 많았다. 2. 가리(加里) 시용량(施用量)에 따른 시험후(試驗後) 토양중(土壤中) 치환성가리함량(置換性加里含量)의 변화율은 시험전(試驗前) 토양(土壤)의 가리함량(加里含量)이 고저(高低)에 관계없이 무가리(無加里), 가리기준반량(加里基準半量), 퇴비시용(堆肥施用) 처리구(處理區)는 현저히 감소한 반면, 가리기준(加里基準) + 퇴비(堆肥), 가리기준(加里基準) + 계분처리구(鷄糞處理區)에서는 현저히 증가하는 경향이었다. 3. 식질계 고평통(高坪統) 토양(土壤)에서 고추연작재배전(連作栽培前) 갈이흙중(中) 치환성가리합량(置換性加里含量) ($K_0$)일 때에 일정재배년차후(一定栽培年次後) 처리별(處理別) 갈이흙중 치환성가리함량(置換性加里含量)($K_t$)은 다음과 같은 모형식(模型式)에서 추정(推定)할 수 있다. $$Kt=K_0A^t+B\sum^{t-1}_{n=0}A^n$$ 단, Kt : t년후 토양(土壤)의 치환성가리함량(置換性加里含量)($K_0$) : 고추재배전(栽培前) 가리흙의 치환성가리함량(置換性加里含量), A와 B : 작물(作物) 및 시용(施用)하는 가리함유물질(加里含有物質) 및 토양특성(土壤特性) 등에 따라 달라질 수 있는 상수 또는 계수).