2026-06-17T01:42:24Zhttp://doidb.wdc-terra.org/oaip/oai

oai:doidb.wdc-terra.org:69882026-06-10T10:11:56ZDOIDBDOIDB.ISG

false4DOIDB.ISG 10.5880/isg.2018.001 Hwang, Cheinway Cheinway Hwang 0000-0002-3322-353X Department of Civil Engineering, National Chiao Tung University, Hsinchu, Taiwan Hsu, Hung‑Jui Hung‑Jui Hsu Department of Civil Engineering, National Chiao Tung University, Hsinchu, Taiwan Featherstone, Will E. Will E. Featherstone 0000-0001-9644-4535 School of Earth and Planetary Sciences, Curtin University of Technology, Perth, Australia Cheng, Ching‑Chung Ching‑Chung Cheng Department of Civil Engineering, National Chiao Tung University, Hsinchu, Taiwan Yang, Ming Ming Yang Department of Geomatics, National Cheng Kung University, Tainan, Taiwan Huang, Wenhsuan Wenhsuan Huang Department of Civil Engineering, National Chiao Tung University, Hsinchu, Taiwan Wang, Chong‑You Chong‑You Wang Department of Civil Engineering, National Chiao Tung University, Hsinchu, Taiwan Huang, Jiu‑Fu Jiu‑Fu Huang Department of Land Administration, Ministry of the Interior, Taipei, Taiwan Chen, Kwo‑Hwa Kwo‑Hwa Chen 0000-0003-4205-8182 Department of Real Estate and Built Environment, National Taipei University, New Taipei City, Taiwan Huang, Chi‑Hsun Chi‑Hsun Huang Department of Civil Engineering, National Chiao Tung University, Hsinchu, Taiwan Chen, Hechin Hechin Chen National Land Surveying and Mapping Center, Ministry of the Interior, Taichung, Taiwan Su, Wen‑Yi Wen‑Yi Su Department of Geomatics, National Cheng Kung University, Tainan, Taiwan GFZ Data Services 2018 Geodesy Geoid model ISG Fast Fourier Transform Wong-Gore Stokes kernel modification Taiwan EARTH SCIENCE > SOLID EARTH > GEODETICS > GEOID CHARACTERISTICS EARTH SCIENCE > SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > GRAVITY Reguzzoni, Mirko Mirko Reguzzoni 0000-0002-4027-9347 International Service for the Geoid (ISG), Politecnico di Milano, Italy Carrion, Daniela Daniela Carrion 0000-0003-1262-9394 International Service for the Geoid (ISG), Politecnico di Milano, Italy Rossi, Lorenzo Lorenzo Rossi 0000-0001-6050-1972 International Service for the Geoid (ISG), Politecnico di Milano, Italy Hwang, Cheinway Department of Civil Engineering, National Chiao Tung University, Taiwan ISG Staff International Service for the Geoid (ISG) 2018 Dataset 10.1007/s00190-020-01412-5 http://www.isgeoid.polimi.it/Geoid/format_specs.html 10.1007/s00190-020-01434-z http://www.isgeoid.polimi.it/ 10.5880/isg.2018.002 10.5194/essd-13-1653-2021 1.0 CC BY 4.0 The geoid model for Taiwan, including the Kinmen and Matzu islands, covers the area 118°E–125°E and 21°N–27°N with a grid resolution of 30" x 30". The gravimetric model is based on land, shipborne and airborne gravity data, as well as marine gravity derived from satellite altimetry. After merging data by least-squares collocation, a remove-restore procedure is applied. First height anomalies are computed by 1D FFT with Wong-Gore modification of the Stokes kernel and then they are converted into the geoid heights. The reference global gravity model is EGM2008 up to degree and order 2190. The used digital terrain model is derived from several photogrammetric surveys at a resolution of 3"×3" and 9"×9" for the inner and outer zone, respectively. The gravimetric model fits the GPS/levelling control points with a standard deviation of 7.9 cm (and a mean difference of 21.9 cm).

The geoid model is provided in ISG format 2.0 (ISG Format Specifications), while the file in its original data format is available at the model ISG webpage.
The International Service for the Geoid (ISG) was founded in 1992 (as International Geoid Service - IGeS) and it is now an official service of the International Association of Geodesy (IAG), under the umbrella of the International Gravity Field Service (IGFS). The main activities of ISG consist in collecting, analysing and redistributing local and regional geoid models, as well as organizing international schools on the geoid determination (Reguzzoni et al., 2021).
Gravimetric geoid model TWGEOID18g 118 125 21 27