• Korean Journal of Remote Sensing
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• v.8 no.2
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• pp.93-104
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• 1992

Although the Transverse Mercator(TM) coordinate is used on standard topogrphic maps of Korea as a supplement to regular latitude-longitude coordinate, the use of this TM coordinate system is rather limited to a single coordinate zone that spans only two degrees of longitude. With growing applications of a variety of digiral geographic data, such as satellite remote sensor data, a Cartesian or rectangular coordinate system is more effective to deal with such data type than angular coordinate system. An unified rectangular coordinate system based on the Transverse Mercator projection is designed to cover the whole area of the Korea Peninsula as a single coordinate zone. Considering the width of the peninsula and the distribution of scale error, the origin of the coordinate is determined to 127$^{\circ}$30' east and 38$^{\circ}$ north. Coordinate conversion procedure is discussed along with the corresponding scale error term.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.14 no.2
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• pp.119-126
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• 1996

TM projection is widely used for surveying and mapping. However, the complicated computations and process are required and, moreover. the different results of computation may occur according to different formulae and coefficients. In this study, the transformation formulae are classified into 4 categories and the computations are executed according to the categories. The computations are also made to different value of the circular constant, $\pi$. The result of test shows that the enough number of items in formular have to be used for precise computation and the circular constant has to calculate down the 13 places of decimals in order to obtain the precision of 1mm on the ground scale.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.19 no.2
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• pp.117-123
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• 2001

Requiring topographic information of map due to retaining russia map, which needed accuracy analysis of russia map and relation between its and south korea's map. In order to obtain exact location information from the map which has different reference datum. We have to operate coordinate transformation between maps applied different ellipsoid. In this paper, in order to evaluate accuracy between two maps applied different ellipsoid, it has studied theory of map projection and coordinate transformation. Then, select each point which can be recognized on the two maps for accuracy evaluation. After obtaining coordinate values for each point of same area, it is evaluated accuracy each geodetic coordinate and each TM coordinate. As a result of this study, the maps which have different reference datum could be used if the exact origin shift could be obtained and applied.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10a
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• pp.145-147
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• 2001

지질도 매핑 시스템이 국내외적으로 개발되고 있으나 아직 국내 환경에 적합한 시스템이 없기 때문에 활용되지 못하고 현재까지 현장에서 매핑될 지질 정보를 수기로 입력하고 있다. 이와 같은 고전적인 방식은 작업 데이터 공유, 데이터 유실 및 프로젝트 관리문제를 뒤따르게 된다. 따라서 이와 같은 문제를 해결하기 위하여 이 연구에서는 컴퓨터 기반의 야외지질정보 매핑 시스템을 설계하고 구현하였다. 이 시스템은 노트북과 GPS와 상호 통합된 시스템으로 기 제작된 수피지형도를 배경으로 현위치의 노두 정보가 입력 가능하다. 이를 위하여 GPS 좌표와 TM좌표간 좌표 변환모듈을 통하여 현 좌표를 실시간으로 입력 할 수 있도록 하였다. 또한 기 작성된 수치지질/지형도를 오버레이 연산이 가능하도록 하여 정밀 수치지질도 생산 및 지질도를 통한 의사결정에 활용될 수 있도록 하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04a
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• pp.289-291
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• 2000

GPS는 위성을 이용한 항법지원 시스템으로 최근 민간에 공개되면서 ITS에 이용하려는 연구가 활발히 이루어지고 있다. 또한, 무선데이터통신 기술은 무선으로 인터넷에 접속할 수 있을 정도로 향상되었다. 본 논문에서는 GPS의 위치정보를 수신하고 이를 수치지도와 매핑할 수 있도록 WGS-84 경위도좌표에서 Bessel TM좌표로 변환한 후, 무선데이터통신을 이용하여 중앙관제서버로 위치정보를 전송함으로써 중앙관제센터에서 이동물체를 관제/관리할 수 있는 시스템을 설계하였다.

• Journal of Korean Society for Geospatial Information Science
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• v.3 no.1 s.5
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• pp.37-44
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• 1995

Cartesian coordinate systems used in national base map have 3 zones. If these coordinate systems are used at navigable digital maps without modifications, the edge-matching errors will occur near the edge of two zones. Therefore, it's required to eliminate separate zones of national plane coordinates system suitable far navigable digital map, we choose TM projection that is used at national base map but changed the location and the scale distortion of antral meridian.

• Journal of Korea Water Resources Association
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• v.53 no.12
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• pp.1049-1057
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• 2020

This study aimed to develop a flow measurement method using drone in flood season. Measuring flow in all branches is difficult to conduct annually due to budget and labor limitation, safety and river works. Especially when heavy rain like storm comes, changes in stage-discharge relationship should be reviewed; however, it is usually impeded by the aforementioned issues. To solve the problem, it developed a simple measuring method with a minimum of labor and time. A numeric map and numeric orthophoto coordinate of South Korea are mostly based on Transverse Mercator Projection (TM) in accordance with rectangular coordinate system and use World Geodetic Reference System 1980 (GRS80) oval figure for conversion. Applying a concept of aerial photogrammetry, it located four visible Ground Control Points (GCP) near the river at Uijeongbu-si (Singok Bridge) and Yeongdong-gun (Youngdong 2nd Bridge) station and measured the coordinates using VRS DGPS. Hovering at a same level, drones took orthophoto of water surface at an interval of 3 seconds. It defined the pictures with GRS80 TM coordinate system, a rectangular coordinate system and then conducted an orthometric correction using GCP coordinates. According to X and Y coordinate analysis, it estimated the distance between the floating positions at 3 seconds-intervals and calculated the flow through the flow area according to the flow path. This study attested applicability of the flow measurement method using drone in flood season by applying the rectangular coordinate system based on the concept of aerial photogrammetry.

• Journal of Korean Society for Geospatial Information Science
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• v.2 no.1 s.3
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• pp.93-98
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• 1994

This image of Kangseogu in Pusan, is a digital merge of aerial photos by scale of 1/1,200 map. The merge was carried out 2nd affine and bilinear interpolation. It can improve digital classification to help choose training sites and interprete classification results, and improve visual interpretation, as in this case, by adding detailed information to the multispectral TM data.

• Spatial Information Research
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• v.13 no.3 s.34
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• pp.297-307
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• 2005

This study was performed to get the basic data for the dredging project and logical maintenance of the Yaedang reservoir. The survey of reservoir capacity for calculation of sediment volume carried out using DGPS Echo-Sounder during November $25\~30$ in 2004. The latitude and longitude signal from GPS satellite was received a second interval with the UTM coordinate system. Water depth was measured 0.2 second interval by Echo-sounder sensor in MIDAS Surveyor. The UTM coordinate datum were transformed into standard coordinate datum of Korean(TM coordinate datum) using Arc Info System. Mapping of contour was used Sufer, Arc View and Auto CAB Program Storage capacity of Yaedang reservoir was estimated by average contour area method. Result of this time investigation for useful storage determination of Yaedang reservoir was showed 4,601.585 ha-m and was differenced less 5.425ha-m the bygones useful storage.

• Proceedings of the Korea Multimedia Society Conference
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• 2000.04a
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• pp.284-287
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• 2000

본 논문에서는 Trimble Lassen-SK8 GPS 수신기로부터 측정된 위치정보를 수치지도에 표시하고 이로부터 정보안내 시스템을 설계하였다. 이 시스템에서는 특정위치에 대한 안내와 관련된 음성정보를 출력하고 그 지역을 벗어나는 경우에는 정보의 출력을 종료하도록 한다. GPS 의 수신오차는 원의 방정식을 사용하여 범위를 벗어나는 오차발생에 대한 처리가 가능하도록 했으며, 수치지도의 특정위치의 식별을 위해 Bessel TM 좌표를 WGS-84 경위도 좌표로 적용하였다. 본 논문의 결과는 학교안내 시스템에 적용시켰으며, 만족할만한 결과를 보였다.