CDEM relieves: Elevations maps whose only information is the altitude of the grounds.
The accuracy of propagation prediction models can be strongly affected by the accuracy of terrain height data in a topographic database.
Various methods are available for extracting terrain height data in such cases.
An r.m.s. error of 15 m in terrain height data has been found acceptable for many purposes.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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