• Journal of the Korean Society for Railway
• /
• v.10 no.6
• /
• pp.685-691
• /
• 2007

In this paper through Honan high-speed railroad which is planned with the north and south axis, we will verify the feasibility of the coordinate conversion using railroad control points after regarding current planned-railroad as the linear central axises. From analysis, distortion of Y axis varies 21 cm to 40 cm diminishing to a gentle straight line, distortion of X axis varies 14 cm to 29 cm. Through a revision, the deviation value between the coordinates were 6 mm to 9 mm and it satisfied the allowable error of national geographic information institute which is following ITRF (International Terrestrial Reference Frame) and cadastral boundary survey (10 cm). consequently the coordinate conversion is possible using railroad control points as common control points.

• Korean Journal of Forensic Psychology
• /
• v.12 no.3
• /
• pp.323-341
• /
• 2021

This study examined public perceptions of the reasons underlying sentence reduction for defendants convicted of sex crimes against persons with intellectual disability. An online survey was conducted among 522 adults in South Korea. Respondent endorsement of 20 reasons underlying sentence reduction, which were embedded within the respective rulings, and the perceived appropriateness of statutory sentence for the crimes committed were assessed. The results showed that most respondents endorsed the sentence; moreover, those who disagreed underscored the need for more severe punishment. Almost all the respondents perceived the following reasons and explanations unfavorably: impulsiveness caused by sexual arousal or alcohol consumption; an accidental occurrence; and personal characteristics such as defendant age, health condition, socioeconomic status, developmental history, and family background. However, there was a relative agreement in that the damage caused by the incident was relatively minor, or the defendant's reflection and attitude to recover the damage were used as reasons for the reduction. Differences in respondent perceptions of the reasons underlying sentence reduction as a function of gender and educational background were relatively small. However, younger respondents held harsher attitudes toward sentence reduction. The present findings underscore the need to be mindful of victims' statements and the characteristics of persons with intellectual disability while sentencing.

• Journal of Korean Society for Geospatial Information Science
• /
• v.21 no.4
• /
• pp.117-123
• /
• 2013

The purpose of this research is to suggest the reasonable method of Network RTK surveying in future cadastral re-survey project through the accuracy analysis about Network RTK surveying achievement and the conventional TS-based confirmation surveying. To achieve it, we selected the experiment places and succeeded in achieving the result by Network RTK surveying about total of 307 parcel boundary point. We compared it with the result of confirmation surveying for cadastral, and it was shown that total connection errors of RMSE was ${\pm}0.1028m$ and total 48 places exceeded in the cadastral re-survey allowable error tolerance. The research suggested the practical alternatives in cadastral re-survey project after the comprehensive evaluation of those analysis results. Therefore, the author suggested development and adoptation of integrated electronic plane table surveying method. Moreover, we suggested unifying the first parcel boundary point method into the total station surveying and adopt the Network RTK surveying on the cadastral surveying inspection.

• Spatial Information Research
• /
• v.14 no.3 s.38
• /
• pp.271-284
• /
• 2006

This study suggests the adjustment method of cadastral non-coincidence using spatial data referenced digital cadastral map and a present state. In designing the methodology, we should introduce the semi-automatic method for guaranteeing the stability and the accuracy at the arrangement of cadastral non-coincidence based on some cadastral specialist. This study could mainly show you rotation type, bias type, and rotation/bias type among cadastral non-coincidence types. We selected the matching reference point through the prototype system which automatically arranges in the study area. And then, we analysis the optimum rotation ratio(-0.4%). Finally, this paper show you calibrating cadastral non-coincidence using the rotation ratio. The methodology of this study has a limitation for arranging in case of cadastral non-coincidence by the area variation and some irregular types with unknown reason. Therefore, this case should be surveyed in direct method.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.18 no.2
• /
• pp.143-155
• /
• 2000

With the increasing needs for the integrated use of topographic and cadastral data in order to build an efficient geo-spatial information system. it is urgently necessary to research into its solution. The intention of this study is to detect error types of data and to propose adjustment methods for solving the problems caused by integrating topographic and cadastral data. For this purpose a primary integrated data model is created to link attribute data(land management system) and graphic data within cadastral information in the first step. In next, a secondary integrated data model based on the improved method is formed to coincide the graphic data of cadastral map with that of topographic map. At the first, because a numerous error types md sources caused by separate management of graphic and attribute data are easily checked, it is possible to suggest an improved method to correct these errors using the primary integrated data model. In addition, the accuracy in position and area with coordinate transformation method based on multi-block adjustment is more efficient than rubber-sheeting method. As a result, the secondary integrated data model could be built by harmonizing cadastral map with topographic map using the improved solution.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
• /
• 2006.05a
• /
• pp.96-100
• /
• 2006

지적 측량분야에서의 위성영상의 활용사례는 거의 전무한 상태이며, 그 이유로는 여러 가지가 있겠으나, 무엇보다 위성영상의 해상도가 낮음이 가장 큰 이유라 할 수 있다. 하지만 저렴한 비용으로 넓은 지역을 단시간에 분석, 다양한 정보를 얻을 수 있는 큰 장점 등으로 인하여 앞으로의 그 활용가치는 매우 크다 할 수 있다. 본 연구에서는 IKONOS영상을 이용하여 지적재조사 측량에 적용 가능성을 알아보기 위해 실험한 결과 다음과 같은 연구성과를 얻었다. 먼저, 수치지적도와 IKONOS 영상을 중첩하여 도심지의 건물들을 검사점으로 오차를 측정한 결과 X방향으로 평균 2.77m, Y방향으로 평균 1.58m가 발생하였고 본 연구에서 활용한 영상이 나타내는 면적을 기준으로 개략적인 비용을 산출해 본 결과 위성영상 $6km{\times}5km$의 소요비용이 260,117,000원 정도로 나타났고, 총 소요비용 중 영상의 재료비 비용이 상당히 낮게 차지한다는 장점이 있었다. 그리고 위성영상 기술은 앞으로 많은 발전이 있을 것으로 판단되어 정확도는 더욱더 향상될 것이다. 현재로서는 위성영상을 지적재조사 측량 방법으로 정립하기에는 한계가 있다고 본다. 다만, 지상측량 방법으로 측량이 곤란한 지역 즉, 접근이 제한되는 지역의 사전 정보 정보를 획득하는 수단이나 현황을 참고하는 수준정도로서는 충분한 활용 가능성이 있을 것으로 판단된다.

• KDI Journal of Economic Policy
• /
• v.29 no.1
• /
• pp.41-78
• /
• 2007

Due to the concern of regional unbalance relating to healthcare resources, the government has set up a plan to expand public healthcare services and a policy to manage the supply of hospital beds. However, it is not clear what standards are needed to measure the degree of unbalance, and to what extent the gap needs to be narrowed. Unlike the previous methodology comparing the proportions of patients who move out from their administrative district to receive medical services, this study examines the inconvenience gap patients experience when they have to move out from their actual living area. The logit and multinomial logit models are employed. The regional unbalance decreases when the degree of movement is measured based on the living area. This result implies that essential standard for achieving regional balance relating to medical services need to be based not on the even distribution of medical resources, but the complications of regional people that require proper medical services.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.14 no.2
• /
• pp.141-150
• /
• 1996

A satellite positioning system has been recently introduced in Korea and the applications of the system are in-creasing gradually, and it is, therefore, interested in the geocentric coordinate system. In this paper, the requirements of the redefinition of the Korean geodetic system which is suited to the geocentric datum and the strategies for the establishment of new geodetic networks are considered. It is also taken into account to maintain the control points, in the transition from the old coordinate systems to a new coordinate system.

• Journal of Cadastre & Land InformatiX
• /
• v.46 no.2
• /
• pp.183-196
• /
• 2016

Ground control points are needed for precision geometric correction of satellite images, and the coordinates of a high-quality ground control point can be obtained from the GPS measurement. However, considering the GPS measurement requires an excessive amount o f t ime a nd e fforts, there is a need for coming up with an alternative solution to replace it. Therefore, we examined the possibility of replacing the existing GPS measurement with coordinates available at online maps to acquire the coordinates of ground control points. To this end, we examined error amounts between the coordinates of ground control points obtained through Daum Map API, and them compared the accuracies between three types of coordinate transformation equations which were used for geometric correction of satellite images. In addition, we used the coordinate transformation equation with the highest accuracy, the coordinates of ground control point obtained through the GPS measurement and those acquired through D aum M ap A PI, and conducted geometric correction on them to compare their accuracy and evaluate their effectiveness. According to the results, the 3rd order polynomial transformation equation showed the highest accuracy among three types of coordinates transformation equations. In the case of using mid-resolution satellite images such as those taken by Landsat-8, it seems that it is possible to use geometrically corrected images that have been obtained after acquiring the coordinates of ground control points through Daum Map API.

• Journal of Cadastre & Land InformatiX
• /
• v.51 no.1
• /
• pp.125-136
• /
• 2021

Recently, Unmanned Aerial Vehicle utilization and image processing technology for remote sensing have diversified remarkably with Orthophoto and Digital Surface Model. In particular, It uses more application fields such as spatial information analysis and hazardous areas as well as land surveying. This study analyses the accuracy of the coordinate on Orthophoto and DSM height on slope area with high and low differences by using UAV images. As the result of this study, in the case of GCP on 2D orthophoto, the location error was not produced significantly. The vertical position of the DSM showed the highest accuracy when the height difference between GCPs is under 30m(RMSEZ=0.07m). The location of the GCPs was divided into approximately 10m, 20m, 30m, and 40m with analysis for each of the eight points of GCP and inspection points in general. This study expects that producing both horizontal accuracy of Orthophoto and vertical accuracy of DSM using UAV on the sloped area which similar to this research area will help in spatial information fields.