Naju-si, Conversion of Cadastral Maps to World Geodetic System Coordinates
[Naju=Asia Economy Honam Reporting Headquarters Reporter Han-hyuk Lee] The city of Naju, Jeollanam-do (Mayor Kang In-gyu) announced on the 8th that it has converted cadastral maps and forest land maps, which are the standards for cadastral survey records, into the international standard coordinate system known as the 'World Geodetic System coordinates.'
The World Geodetic System refers to a geodetic system used globally as a common reference for location, applying a geocentric system that uses the Earth's center rather than a specific regional origin for the coordinate system.
Korea has been using cadastral records created based on Japanese territory (Tokyo Datum) through the land survey project during the Japanese colonial period in 1910 until now.
This regional geodetic system was set to suit Japanese topography, and when compared to the world standard coordinates, it showed a deviation of about 365 meters southeast, making it difficult to link with other spatial information and reducing its usability.
Since 2016, the city has observed over 2,900 cadastral reference points in World Geodetic System coordinates, secured 40 common reference points, and completed the conversion of approximately 390,000 cadastral parcels in flood-prone areas within the jurisdiction to the World Geodetic System.
Additionally, by the end of this year, the city plans to complete the conversion of World Geodetic System coordinates for about 15,000 parcels in areas where boundary point coordinate registration is required.
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Mayor Kang In-gyu stated, “With the completion of the World Geodetic System coordinate conversion, the local cadastral records are now positioned in international standard coordinates,” adding, “This will not only ensure the accuracy of cadastral surveying but also provide high-quality land-related civil services through convergence and integration with other spatial information.”
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