英文摘要 |
TWD97 and WGS84 are two geodetic datum used by Taiwan and the United States GPS satellite navigation system, respectively. However, recently, WGS84 has been an equivalent term for geographic coordinate system (latitude-longitude), and TWD97 is another way of expressing projected coordinates in Taiwan. This phenomenon is observed in discussions by professionals in the geomatics field, in published papers, and also found in the coordinate system selection options for government websites. This paper briefly introduces the meaning of TWD97 and WGS84 respectively and explores the origin of this phenomenon. The content of “converting from WGS84 to TWD97” is also discussed for clarification. |