• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.34 no.1
• /
• pp.53-62
• /
• 2016

In recent years, UAV Photogrammetry based on an ultra-light UAS(Unmanned Aerial System) installed with a low-cost compact navigation device and a camera has attracted great attention through fast and accurate acquirement of geo-spatial data. In particular, UAV Photogrammetry do gradually replace the traditional aerial photogrammetry because it is able to produce DEMs(Digital Elevation Models) and Orthophotos rapidly owing to large amounts of high resolution image collection by a low-cost camera and image processing software combined with computer vision technique. With these advantages, UAV-Photogrammetry has therefore been applying to a large scale mapping and cadastral surveying that require accurate position information. This paper presents experimental results of an accuracy performance test with images of 4cm GSD from a fixed wing UAS to demarcate parcel boundaries in agricultural area. Consequently, the accuracy of boundary point extracted from UAS orthoimage has shown less than 8cm compared with that of terrestrial cadastral surveying. This means that UAV images satisfy the tolerance limit of distance error in cadastral surveying for the scale of 1: 500. And also, the area deviation is negligible small, about 0.2%(3.3m²), against true area of 1,969m² by cadastral surveying. UAV-Photogrammetry is therefore as a promising technology to demarcate parcel boundaries.

• The Journal of The Korea Institute of Intelligent Transport Systems
• /
• v.9 no.1
• /
• pp.121-130
• /
• 2010

As the development of wireless environment and portable devices, navigation companies need more spatial information for Location Based Service and so they are investing heavily in this part. But my country have constructed lots of spatial dataset during the NGIS project, and then we can reduce costs by using constructed spatial dataset. The integration method of each building information between e-AIS and KLIS-rn is linked to designed mapping table by main building numbers and auxiliary cadastral number. e-AIS and KLIS-rn are integrated by the feature matching between CAD data and KLIS-rn. Due to the limitation of test data, more accuracy test will be required with various data sets.

• 한국공간정보시스템학회:학술대회논문집
• /
• 2007.06a
• /
• pp.95-101
• /
• 2007

지적데이터가 기초지방자치단체에 구축되고 많은 예산과 인력을 투입 하여 유지 관리 되고 있으며, 이를 기본도로 이용한 GIS의 구축이 활성화 되고 있다. 이에 따라 지적데이터의 유통도 급속히 늘어나고 있으나, 이를 관장하는 지적법에 관련된 규정의 보완되지 않고 있으며 이에 대한 연구가 충분히 되고 있지 않다. 지적데이터 특성상 공공재로서 인식과 비교적 간단하게 복제되어 활용할 수 있기 때문에 공식 인증 되지 않은 지적데이터의 불법 유통으로 많은 문제점이 발생 되고 있다. 본 연구는 이러한 문제점을 보완하기 위하여 지적데이터의 지적재산권을 보호하여 유통 질서를 바로 잡음으로서 지적데이터의 신뢰성을 확보하고, 유통을 증진 시키고자 하였다. 연구를 진행하기 위하여 지적재산권과 관련된 국제적 동향 및 지적재산권 관련 법률 검토와 이와 관련된 판결을 분석하여 지적데이터의 지적재산권 보호의 법률적 타당성을 검토하였다. 그리고 이해당사자들의 인식 조사를 통하여 지적데이터의 지적재산권 보호에 대한 인식을 바탕으로 지적재산권 보호 방안을 제시 하고 지적데이터의 유통 질서를 마련하고자 하였다.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
• /
• 2008.10a
• /
• pp.266-267
• /
• 2008

건설도면 CAD자료와 GIS자료를 연계하기 위해서는 임의의 좌표체계와 축척으로 표현된 건설도면 CAD 자료를 GIS 자료의 지도좌표로 변환하기 위한 과정 이 수행되어 야 한다. 본 연구에서는 준공과정에서 제출되는 건축물 CAD배치도상의 인접대지경계선 폴리곤과의 연속지적도상의 개별 필지 경계선의 형상 정합과정을 수행함으로써 좌표변환에 필요한 변수를 도출해 보았다. 이렇게 도출된 변환함수를 배치도면상의 건물경계선과 같은 다른 객체에 적용함으로써 개별 CAD자료를 GIS 자료에 연계할 수 있는 실좌표 부여 방법을 적용하고 평가해 보았다.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2008.05a
• /
• pp.194-198
• /
• 2008

Significant soil erosion and water quality degradation issues are occurring at highland agricultural areas of Kangwon province because of agronomic and topographical specialities of the region. Thus spatial and temporal modeling techniques are often utilized to analyze soil erosion and sediment behaviors at watershed scale. The Soil and Water Assessment Tool (SWAT) model is one of the watershed scale models that have been widely used for these ends in Korea. In most cases, the SWAT users tend to use the readily available input dataset, such as the Ministry of Environment (MOE) land cover data ignoring temporal and spatial changes in land cover. Spatial and temporal resolutions of the MOE land cover data are not good enough to reflect field condition for accurate assesment of soil erosion and sediment behaviors. Especially accelerated soil erosion is occurring from agricultural fields, which is sometimes not possible to identify with low-resolution MOD land cover data. Thus new land cover data is prepared with cadastral map and high spatial resolution images of the Doam-dam watershed. The SWAT model was calibrated and validated with this land cover data. The EI values were 0.79 and 0.85 for streamflow calibration and validation, respectively. The EI were 0.79 and 0.86 for sediment calibration and validation, respectively. These EI values were greater than those with MOE land cover data. With newly prepared land cover dataset for the Doam-dam watershed, the SWAT model better predicts hydrologic and sediment behaviors. The number of HRUs with new land cover data increased by 70.2% compared with that with the MOE land cover, indicating better representation of small-sized agricultural field boundaries. The SWAT estimated annual average sediment yield with the MOE land cover data was 61.8 ton/ha/year for the Doam-dam watershed, while 36.2 ton/ha/year (70.7% difference) of annual sediment yield with new land cover data. Especially the most significant difference in estimated sediment yield was 548.0% for the subwatershed #2 (165.9 ton/ha/year with the MOE land cover data and 25.6 ton/ha/year with new land cover data developed in this study). The results obtained in this study implies that the use of MOE land cover data in SWAT sediment simulation for the Doam-dam watershed could results in 70.7% differences in overall sediment estimation and incorrect identification of sediment hot spot areas (such as subwatershed #2) for effective sediment management. Therefore it is recommended that one needs to carefully validate land cover for the study watershed for accurate hydrologic and sediment simulation with the SWAT model.

• Spatial Information Research
• /
• v.6 no.1
• /
• pp.47-63
• /
• 1998

Internet GIS represents the GIS technique that, by integrating Internet and GIS technique, provides geographic information services through Internet environments, Internet GIS suggests that one can search and analyze spatial data through WWW under the dynamic client/ server computing environments, In this paper we introduce the development of a new address management system using GIS technique and a new address information system using Internet GIS, The new address system, which is based on stress name and building number along the street, is developed to complement the current address system which is based on cadastral system, The new address management system is developed for the management of address change due to establishment of roads, construction and destruction of buildings etc using a GIS, The new address information system presents the Internet GIS system which provides people with geographic and address information. By implementing the new address information system it is possible to share GIS data, increase the efficiency of implementation of GIS system, and maximize its usablity.

• Korean Journal of Remote Sensing
• /
• v.20 no.6
• /
• pp.397-408
• /
• 2004

In this study, surface temperature which was extracted from Landsat TM band 6 was compared and analyzed with the AWS(Automatic Weather System) observation data for studying urban heat environment properties with possibility of remote sensing data application. In order to verification of the distribution properties of urban surface temperature, correlation analysis between surface temperature and NDVI, the distribution properties of urban surface temperature by land use/cover patterns were carried out by GIS spatial analysis techniques. The results presented that the spatial distribution of urban surface temperature was very different depending on various land use/cover patterns of surrounding areas. Also there was the reverse linear relationship between surface temperature and NDVI. These results will be worked as one of the major factors for environmentally sustainable urban planning considering the characteristics of weather environments in the near future.

• Journal of Korean Society for Geospatial Information Science
• /
• v.22 no.1
• /
• pp.3-12
• /
• 2014

Cadastre is a set of activity registering diverse land information in national scope land management works. A nation examine land information and register it in a cadastral book, and must update data when necessary to properly maintain the information. Currently, local governments execute work about parcels of land alternation by manual work based on KLIS road map. Therefore, it takes too much time-consuming and makes problem as missing lots of parcels of land alternation. This study suggests the method selecting the parcels of land alteration for Jinan-Gun of Jeollabuk-Do using the GIS spatial overlay and the following results are as belows. Firstly, the manual work on the parcels of land alteration was greatly improved through automatically extracting the number and area of parcels according to the land classification and ownership by GIS spatial overlay based on serial cadastral maps and KLIS road lines. Secondly, existing work based on KLIS road lines could be advanced by analyzing the parcels of land alternation using the actual-width of the road from new address system to consider all road area for study site. Lastly, this study can supply efficient information in determining the parcels of land alternation consistant with road condition of local governments by analyzing the number and area of parcels according to the land classification and ownership within various roadsides ranging from 3m, 5m, and 10m by GIS buffering method.

• Journal of Korean Society for Geospatial Information Science
• /
• v.23 no.2
• /
• pp.79-88
• /
• 2015

In any production and construction of geospatial information covering surveying, survey control point is a vital geospatial information. Survey control points in South Korea are currently classified as following: national control points, public control points, and cadastral control points. Each of these different categories of survey control points act as a basis and sets perimeters for the production, management and operation of subjects within the category. Universal standard, the unified format between different survey control points, also, are not yet defined, causing difference in basic information provided by altering categories and disturbance in connecting, managing, utilizing and operating survey control points. Establishment of a standard regarding survey control points, is therefore required for the efficacy of their utilization. This study, to solve such inadequacies, selects management items for creation of standardized survey control point, by investigating domestically and internationally the status of operating survey control points, determining data model for management, establishing TTA and agency standards, and establishing of activation methodology for survey control point standards.

• Journal of Korean Society of Rural Planning
• /
• v.10 no.2 s.23
• /
• pp.35-42
• /
• 2004

This study aimed at establishing the multi-ranged approach on data acquisition technique for rural landscape planning, which tried categorization, grading and transferring of landscape elements in the more detailed level. For the systematic management of database for the topographic informations in the village level, a kind of the aerial photographing techniques with UAV(Unmanned Aerial Vehicle) was used and its resultant data for the landscape simulation of the rural village, which in turn helped the convenient approach to understanding of its comprehensive spatial structure. The image data from aerial photography was systematically processed through; First, after revision of the distorted one, the image map was adjusted with the topographical and cadastral maps. Second, the farm houses and buildings, and other facilities difficult to find out in the topographical map was digitally read from the adjusted image. The topographical landscape view of rural village was simulated on the base of DEM(Digital Elevation Model) and the 3-dimensional shapes of farm houses and buildings were automatically modelled using the input system developed by the author. In conclusion, the aerial image information adjusted with the edited maps could give more intuitive and detailed villagescape than the ordinary one and through landscape simulation of the rural village, its topography, features of houses/buildings and spatial distribution of land uses were effectively reproduced. And, by the linkage between field survey and photographed/simulated results of the typical landscape elements using hyper-link method, it would be expected to develop as an effective visualization technique of rural landscape.