Global_Topography SRTM30_PLUS V7
Global Topography SRTM30_PLUS V7
SEAFLOOR DEPTH - Colors and 500m contours represent variations in seafloor depth (bathymetry). These data provide the basis for 90% of the ocean data shown in Google Earth. Small dots show the locations of the deeper water soundings. In areas where no depth soundings are available, the seafloor depth is a scaled version of gravity anomaly derived from satellite altimetry. The scale factor varies with a number of parameters including sediment thickness and mean ocean depth. The details of this bathymetry prediction process are described in two publications [Smith and Sandwell, 1994; Smith and Sandwell, 1997]. http://topex.ucsd.edu/sandwell/publications/59.pdf http://topex.ucsd.edu/sandwell/publications/74.pdf This particular data set includes 290 million, depth soundings compiled and edited by investigators at SIO, NOAA, NGA, U.S. Navy, and GEBCO. The details are included in the following publication: A more general description of seafloor bathymetry and plate tectonics can be found at: http://topex.ucsd.edu/sandwell/publications/119.pdf DATA ACCESS - Gridded data and raw soundings are available at: http://topex.ucsd.edu/WWW_html/srtm30_plus.html GRAPHICS - Generic Mapping Tools (GMT) was used to generate the colored contour maps for direct input into Google Earth http://gmt.soest.hawaii.edu/ MISSING DATA AND OTHER COMMENTS - If you see deep ocean data that are missing from this compilations find errors or have other comments, please contact David T. Sandwell, dsandwell@ucsd.edu.

attribution

Data Title

high resolution

SRTM30_PLUS V7

intermediate resolution

Topography V14.1

low resolution