VDatum for Washington

VDatum transformation software and documentation are available for download by clicking on the project name on the image map.

References

Spargo, E. A., Hess, K. W., White S. A., 2006:   VDatum for the San Juan Islands and Strait of Juan de Fuca with Updates for Puget Sound: Tidal Datum Modeling and Population of the Grids.  U.S. Department of Commerce, National Oceanic and Atmospheric Administration, Silver Spring, Maryland, NOAA Technical Report, NOS CS 23, 50 p.

Hess, K. W., and White, S. A., 2004:   VDatum for Puget Sound: Generation of the Grid and Population with Tidal Datums and Sea Surface Topography.  U.S. Department of Commerce, National Oceanic and Atmospheric Administration, Silver Spring, Maryland, NOAA Technical Memorandum NOS CS 4, 27 p.

Hess, K. W., and Gill, S. K., 2003:   Puget Sound Tidal Datums by Spatial Interpolation.  Proceedings, Fifth Conference on Coastal Atmospheric and Oceanic Prediction and Processes,  American Meteorological Society, Seattle, Washington, August 6-8, 2003. Paper 6.1, pp. 108-112.

Disclaimer: Although many of the vertical datum transformations between the North American Vertical Datum of 1988 (NAVD 88) and mean sea level, and between mean sea level and the other tidal datums, are based on tidal values from the present National Tidal Datum Epoch (NTDE, 1983 to 2001), some are based on data from older tidal epochs. NOS is in the process of updating the data in VDatum to conform to the latest NTDE. In the meantime, care should be used when applying these transformations.