Datagov Opendata Platform

This dataset provides elevation information for the GNSS continuous fixed stations belonging to the Water Resources Agency in all the land subsidence areas in Taiwan, allowing users to understand the data time period monitored by the existing GNSS continuous fixed stations and their corresponding elevation results. There are currently a total of 33 GNSS fixed stations within the agency, including Changhua Xigang Elementary School, Xinsheng Elementary School, Hunan Elementary School, Xizhou Elementary School, Yunlin Xinxing Elementary School, Tuku Junior High School, Kezuo Elementary School, Guangfu Elementary School, Linnei Junior High School, Honglun Elementary School, Tiger Tail Elementary School at the National Chung Hsing University, Mingde Elementary School, Fengrong Elementary School, Shuicanlin Elementary School, Yiwu Junior High School, Xiutan Elementary School, Yuanchang Elementary School, An Nan Elementary School, Nanguang Elementary School, Longyan Elementary School, Zhengmin Elementary School, Shanbei Elementary School, Jiuzhuang Elementary School, Zhongxiao Elementary School, Renhe Elementary School, Jiayi Budai Elementary School, WanNei Elementary School, Suantou Elementary School, Xinpi Elementary School, Guolu Elementary School, Pingtung Linbian Junior High School, Dingliao Safety Inspection Station, and Tainan Jinhui Elementary School. GNSS continuous fixed stations have the characteristics of 24-hour all-weather observation, global distribution of satellite clusters, and being unaffected by weather and time, thus providing daily elevation results that can further reveal the daily changes in elevation over time. Therefore, the time resolution of GNSS continuous fixed stations is one day. However, the elevation changes provided by GNSS continuous fixed stations are for a single monitoring station and cannot represent the surface changes of the entire region. The Water Resources Agency currently uses leveling elevation detection or radar interference measurement (InSAR) to conduct large-scale spatial measurements to obtain planar surface changes. After the Water Resources Agency's review and approval, formal monitoring data is published annually.