The gravimetric geoid of Taiwan: TWGEOID18g

DOI

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.

Identifier
DOI https://doi.org/10.5880/isg.2018.001
Related Identifier https://doi.org/10.1007/s00190-020-01412-5
Related Identifier http://www.isgeoid.polimi.it/Geoid/format_specs.html
Related Identifier https://doi.org/10.1007/s00190-020-01434-z
Related Identifier http://www.isgeoid.polimi.it/
Related Identifier https://doi.org/10.5880/isg.2018.002
Metadata Access http://doidb.wdc-terra.org/oaip/oai?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:doidb.wdc-terra.org:6988
Provenance
Creator Hwang, Cheinway (ORCID: 0000-0002-3322-353X); Hsu, Hung‑Jui; Featherstone, Will E. ORCID logo; Cheng, Ching‑Chung; Yang, Ming; Huang, Wenhsuan; Wang, Chong‑You; Huang, Jiu‑Fu; Chen, Kwo‑Hwa ORCID logo; Huang, Chi‑Hsun; Chen, Hechin; Su, Wen‑Yi
Publisher GFZ Data Services
Contributor Reguzzoni, Mirko; Carrion, Daniela; Rossi, Lorenzo; Hwang, Cheinway; ISG Staff
Publication Year 2018
Rights CC BY 4.0; http://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact Hwang, Cheinway (Department of Civil Engineering, National Chiao Tung University, Taiwan); ISG Staff (International Service for the Geoid (ISG))
Representation
Resource Type Dataset
Version 1.0
Discipline Geodesy, Geoinformatics and Remote Sensing
Spatial Coverage (118.000W, 21.000S, 125.000E, 27.000N); Gravimetric geoid model TWGEOID18g