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On Determination of a Regional Vertical Datum by Combination of EGM, Local Gravity and GPS/leveling Data
| Content Provider | Semantic Scholar |
|---|---|
| Author | Novák, Pavel |
| Copyright Year | 2010 |
| Abstract | SUMMARY Global Navigation Satellite Systems (GNSS) allow for precise 3D positioning with respect to a selected geocentric reference ellipsoid. Still, physical heights referring to a regional vertical datum are widely used by surveying and mapping agencies due to their link to the Earth’s gravity field that must be taken into the account for hydrological and other projects. The transformation of geodetic heights measured by GNSS receivers into national height systems became an everyday task for surveyors worldwide. The determination of a local or regional vertical datum required for the height transformation is discussed in this contribution. Determination methods based on combination of global geopotential models, local gravity and GPS/leveling data are described including an impact of recent advances in global gravity field modeling and increasing availability of GPS/leveling data. Both concepts currently used in geodesy (orthometric heights/geoid and normal heights/quasi-geoid) are reviewed. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.fig.net/resources/proceedings/fig_proceedings/fig2010/papers/fs01c/fs01c_novak_4048.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |