Layer: Bathymetry - Galveston Bay (ID: 9)

Name: Bathymetry - Galveston Bay

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Description: Bathymetry for Galveston Bay was derived from thirty-three surveys containing 209,359 soundings. Twelve overlapping, older, less accurate surveys were omitted, and overlap from eight older, less accurate surveys was omitted. The average separation between soundings was 84 meters. The thirty-three surveys used dated from 1931 to 1983 with the oldest surveys in the northern and southernmost portions of the bay. The majority of the surveys were from the early 1960s. The soundings ranged from 1.2 meters to -16.5 meters at mean low water. Mean high water values of 0.3 or 0.4 meters were assigned to the shoreline. Twelve points were found that were not consistent with the surrounding points. These were removed prior to tinning. Galveston Bay has twenty-nine 7.5 minute DEMs and two one degree DEMs.

Copyright Text: National Ocean Service/Special Projects, NOAA, Department of Commerce

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