Abrir versión para imprimir (puede necesitar FlashPlayer pero es más apta para uso en dispositivos móviles)
Abrir versión multimedia (puede necesitar FlashPlayer)
Publicado el: 2016-09-08
Tiempo de estudio aproximado: .50 - .75 h
Incluye sonido: no
Geospatial
Oceanography/Marine/Tsunami
This lesson addresses how sea level is determined and applied. It starts with a general discussion of the surfaces that form the basis of measurement, called datums, then looks more closely at the vertical datums that form the basis of height measurements. We cover tidal datums in more depth, including the different datums, their extent, period of record (called a tidal epoch), and common applications. We conclude with a look at some data resources for tidal datums and sea level trends.
After completing this lesson, the learner should be able to do the following:
sea level, mean sea level, MSL, datum, vertical datum, tides, tidal datum, tidal epoch, local mean sea level, relative sea level, Mean lower low water, MLLW, mean high water, MHW, geoid, ellipsoid, orthometric, sea surface height, global mean sea level, ocean surface topography, dynamic ocean topography, NAVD 88, NGVD 29, National Tidal Datum Epoch, NTDE