| Autor: |
H. Codallo, G. Acuña, Eugen Wildermann, M. Barrios, Melvin Hoyer, Giovanni Royero, J. León, Víctor Cioce, L. Bacaicoa |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Geodesy for Planet Earth ISBN: 9783642203374 |
| DOI: |
10.1007/978-3-642-20338-1_113 |
| Popis: |
The combination of global geopotential earth models with high resolution digital terrain models forms the main tool for geoid modelling and satisfies the requirements at a wide range of gravity field frequencies. The need for local and regional data can be reduced to minor areas around points of interest. The resolution gap between potential models and digital terrain models is narrowing – EGM08 and SRTM, for instance, going down to 5′- and 3″-spacing, respectively. The influence of regional gravity data or other field components is reduced to a limited area zone. This means a significant advantage particularly in the case of developing countries which normally demonstrate heterogeneous data quality, bad geographical distribution or complete lack of local data sources at all. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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