Determination of the Parameter for Transformation of Local Geodetic System to the World Geodetic System using GNSS

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1 Vol. (Architecture and Civil Engineering 2), pp Determination of the Parameter for Transformation of Local Geodetic System to the World Geodetic System using GNSS Joon Kyu Park, Dae Wook Park 2 * Dept. of Civil Engineering, Seoil University, 28, Yongmasan-ro -gil, Jungnang-gu, Seoul, Korea jkpark@seoil.ac.kr 2 Dept. of Civil Engineering, Kunsan National University 8, Daehak-ro, Gunsan-si, Jeollabuk-do, Korea dpark@kunsan.ac.kr Abstract. Because of development of the GNSS (Global Navigation Satellite System) technology it has been requested a continuous geodetic system at the positioning in the world. Therefore the datum was changed from local geodetic system to world geodetic system in Korea. And cadastral resurvey project had been performed continuously since 6. In this study, parameters for coordinate transformation were determined in the study area. For this purpose, static GNSS surveying were accomplished in study area and transformation parameters were calculated using static survey results. Keywords: GNSS, Would Geodetic System, Local Geodetic System, Coordinate Transformation Introduction Recently, with the rapid growth of geospatial information, and the development of the satellite technique of GNSS (Global Navigation Satellite System) such as GPS (Global Positioning System), GLONASS, Galileo, Beidou etc. quick provision of data about the properties and location of individual lots as well as real-time topographic information is required and highly important in terms of the provision of real-time data including human information for the positioning [][2]. In the cadastral field, for the effective surveying using the GNSS, a change of the plane rectangular coordinate system that was constructed on the local coordinate system to the world geodetic system which is a geocentric system of coordinates is necessary[]. In many countries, it has been changed their own geodetic system from local to global, because it has been needed the positioning in unified datum caused by activation of satellite navigation system in the world [4][]. In Korea, cadastral resurvey project had been performed continuously since 6[6]. * Corresponding author ISSN: ASTL Copyright 2 SERSC

2 Vol. (Architecture and Civil Engineering 2) In this study, static GNSS surveying were accomplished in study area and parameters for coordinate transformation were determined by Helmert transformation as a part of cadastral resurvey project. 2 Static GNSS surveying and data processing supplementary control points in Neung-seo myeon, Yeoju were selected. And static GNSS surveying were performed more than 2 hours at each points for the surveying. Fig. shows the study area and Fig. 2 shows supplementary control points. Fig.. Study area Fig. 2. Supplementary control points The observation data of study area were processed by relative positioning using 4 CORS (Continuously Operating Reference Station) of NGII (National Geographic Information Institute). CORS were used by reference points with coordinates based on world geodetic system. Fig. shows Observation network. Copyright 2 SERSC

3 Vol. (Architecture and Civil Engineering 2) Fig.. Observation Network Determination of the Parameters for Transformation In this study, for the determination of the transformation parameter, at first static GNSS surveying and data processing were performed. And then coordinates transformation parameters were calculated by Helmert transformation methods. Table shows surveying results and parameters for transformation. Table. Surveying results and parameters for transformation No. Point Local Geodetic System Global Geodetic System X(m) Y(m) X(m) Y(m) Copyright 2 SERSC

4 Vol. (Architecture and Civil Engineering 2) Parameters Precision RMSE Sxy Rxy Tx Ty. -6.E Sxy Rxy Tx Ty E- -E- dx(m) dy(m)..8 As shown in Table the Parameters for Transformation were calculated. These parameters could be used for the coordinate transformation from local geodetic system to global geodetic system. If additional study about accuracy verification using check point would be performed, the transformation parameters would be great help to the cadastral resurvey project. 4 Conclusion In this study, static GNSS surveying were accomplished on the supplementary control points in the study area. And coordinates of each points based on world geodetic system were calculated. The parameters for Transformation were determined by Helmert transformation. These parameters could be used for the coordinate transformation from local geodetic system to global geodetic system. If additional study about accuracy verification using check point would be performed, the transformation parameters would be great help to the cadastral resurvey project. Acknowledgments. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (NRF-2RAAA66). References. C. S. Yang, Development of the Process of Coordinate Transformation of Local Datum Cadastral Map to the World Geodetic System - Using Adjusted Coordinate -, Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, Vol. 2, No. 4-2, (24), pp Copyright 2 SERSC 2

5 Vol. (Architecture and Civil Engineering 2) 2. K. U. Kwon, A study on transformation of world geodetic coordinate system in the region of Guam origins, Journal of the Korean Society of Cadastre, Vol. 2, No., (2),pp J. K. Park, J. S. Lee and M. G. Kim, Construction of Console Application for Automated GPS Data Processing, International Journal of Control and Automation, Vol. 6, No. 2, (2), pp S. E. Hong, Integration Model Design Strategy for Cadastral Information System: Case Study of a Cadastral Management System in Korea, International Journal of Software Engineering and Its Applications, Vol., No., (2), pp J. K. Park, M. G. Kim and J. S. Lee, Tectonic Motion Monitoring of Antarctica Using GPS Measurements, International Journal of Control and Automation, Vol. 6, No. 2, (2), pp Y. G. Jeon and J. H. Cho, The Study on the Presumption of Cadastral Discordance Area by Transformed World Geodetic Coordinates, Journal of Korean Association of Cadastre Information, Vol., No. 2, (2), pp Copyright 2 SERSC