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Bathymetric maps

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View Resource Bathymetry, Sidescan Sonar Image, Surface Sediments, and Surficial Geological Map of the Inner Shelf off Sarasota, Florida: Preliminary discussion and GIS database release

This site is a USGS open file report that includes data in the form of imagery, bathymetry, samples, and geologic interpretive coverages. Sidescan sonar mosaic imagery is featured (.gif). The area mapped extends from Sarasota Point to Buttonwood Harbor and offshore between approximately three-meter and thirteen-meter water depths.

https://pubs.usgs.gov/of/1999/of99-396/
View Resource Bathymetry of Crater Lake

The bathymetry survey of Crater Lake by scientists from the USGS, University of New Hampshire's Center for Coastal and Ocean Mapping, and the National Park Service, began on July 28, 2000. This site houses the first images gained from the high-resolution multi-beam technology survey. Various digital data such as digital raster graphics and digital line graphs may be viewed as .jpeg and .gif images...

http://oe.oregonexplorer.info/craterlake//bathymetry.html
View Resource Office of Coast Survey

The Office of Coast Survey (OCS) within the National Oceanic and Atmospheric Administration -- founded in 1807 by Thomas Jefferson -- is responsible for producing nautical charts for all the waters of the US and its territories. The OCS home page offers anyone in need of nautical maps lots of well-maintained and timely resources. Historical charts (from the 1700s onward), information on wreck and...

https://www.nauticalcharts.noaa.gov/