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 data       graph  M    files  public SRTM30_PLUS Estimated Topography, 30 seconds, Global, v11, Lon+/-180    ?   F   I   M   background (external link) RSS Subscribe
SIO, NOAA, U.S.  ... ?
srtm30plus_LonPM180

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL cdm_data_type String Grid
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String dsandwell@ucsd.edu
attribute NC_GLOBAL creator_name String David T. Sandwell
attribute NC_GLOBAL creator_type String person
attribute NC_GLOBAL creator_url String http://topex.ucsd.edu/sandwell/ (external link)
attribute NC_GLOBAL Easternmost_Easting double 179.99583333333334
attribute NC_GLOBAL geospatial_lat_max double 89.99583333333334
attribute NC_GLOBAL geospatial_lat_min double -89.99583333333334
attribute NC_GLOBAL geospatial_lat_resolution double 0.008333333333333333
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double 179.99583333333334
attribute NC_GLOBAL geospatial_lon_min double -179.99583333333334
attribute NC_GLOBAL geospatial_lon_resolution double 0.008333333333333333
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL GMT_version String 4.5.12 [64-bit]
attribute NC_GLOBAL history String xyz2grd -V -Rg -I30c topo30 -Gtopo30.grd=ns -ZTLhw -F
attribute NC_GLOBAL infoUrl String http://topex.ucsd.edu/WWW_html/srtm30_plus.html (external link)
attribute NC_GLOBAL institution String SIO, NOAA, U.S. Navy, NGA, GEBCO
attribute NC_GLOBAL keywords String altitude, bathymetry, Becker, data, DEM, elevation, estimated, global, GMT, Sandwell, seconds, Smith, topex, topo30, topography, ucsd, v11
attribute NC_GLOBAL license String David T. Sandwell, Joseph J. Becker, and Walter H. F. Smith.
The Regents of the University of California
All Rights Reserved

Permission to copy, modify and distribute any part of this gridded bathymetry at 30 second resolution for educational, research and non-profit purposes, without fee, and without a written agreement is hereby granted provided that the above notice, this paragraph and the following three paragraphs appear in all copies.

Those desiring to incorporate this global bathymetry into commercial products or use for commercial purposes should contact the Technology Transfer & Intellectual Property Services, University of California, San Diego, 9500 Gilman Drive, Mail Code 0910, La Jolla, CA 92093-0910, Ph: (858) 534-5815, FAX: (858) 534-7345, E-MAIL:invent@ucsd.edu.

IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS global bathymetry, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

THE global bathymetry PROVIDED HEREIN IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. THE UNIVERSITY OF CALIFORNIA MAKES NO REPRESENTATIONS AND EXTENDS NO WARRANTIES OF ANY KIND, EITHER IMPLIED OR EXPRESS, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR THAT THE USE OF THE global bathymetry WILL NOT INFRINGE ANY PATENT, TRADEMARK OR OTHER RIGHTS.
attribute NC_GLOBAL node_offset int 1
attribute NC_GLOBAL Northernmost_Northing double 89.99583333333334
attribute NC_GLOBAL references String Reference, sounding data: Becker, J. J., D. T. Sandwell, W. H. F. Smith, J. Braud, B. Binder, J. Depner, D. Fabre, J. Factor, S. Ingalls, S-H. Kim, R. Ladner, K. Marks, S. Nelson, A. Pharaoh, R. Trimmer, J. Von Rosenberg, G. Wallace, P. Weatherall., Global Bathymetry and Elevation Data at 30 Arc Seconds Resolution: SRTM30_PLUS, Marine Geodesy, 32:4, 355-371, 2009.

Reference, gravity data: Sandwell, D. T., R. D. Müller, W. H. F. Smith, E. Garcia, R. Francis, New global marine gravity model from CryoSat-2 and Jason-1 reveals buried tectonic structure, Science, Vol. 346, no. 6205, pp. 65-67, doi: 10.1126/science.1258213, 2014.
attribute NC_GLOBAL sourceUrl String ftp://topex.ucsd.edu/pub/srtm30_plus/topo30.grd (external link)
attribute NC_GLOBAL Southernmost_Northing double -89.99583333333334
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v29
attribute NC_GLOBAL summary String One GMT file, topo30.grd, with the entire global topography. The grid resolution is 30 seconds which is roughly 0.55km at the equator. The data are pixel registered.

Land data are based on the 1-km averages of topography derived from the USGS SRTM30 grided DEM data product created with data from the NASA Shuttle Radar Topography Mission (http://www2.jpl.nasa.gov/srtm/). GTOPO30 data (http://www1.gsi.go.jp/geowww/globalmap-gsi/gtopo30/gtopo30.html) are used for high latitudes where SRTM data are not available.

Ocean data are based on the Smith and Sandwell global 1-minute grid (http://topex.ucsd.edu/WWW_html/mar_topo.html) between latitudes +/-81 degrees. Higher resolution grids have been added from the LDEO Ridge Multibeam Synthesis Project (http://ocean-ridge.ldeo.columbia.edu/general/html/home.html), the JAMSTEC Data Site for Research Cruises (http://www.jamstec.go.jp/cruisedata/e/), and the NGDC Coastal Relief Model (http://www.ngdc.noaa.gov/mgg/coastal/coastal.html). Arctic bathymetry is from the International Bathymetric Chart of the Oceans (IBCAO) (http://www.ngdc.noaa.gov/mgg/bathymetry/arctic/arctic.html) [Jakobsson et al., 2003].

Matching files of source identification number are available for determining the data source for every pixel.
attribute NC_GLOBAL title String SRTM30_PLUS Estimated Topography, 30 seconds, Global, v11, Lon+/-180
attribute NC_GLOBAL Westernmost_Easting double -179.99583333333334
dimension latitude   double nValues=21600, evenlySpaced=true, averageSpacing=0.008333333333333333
attribute latitude _CoordinateAxisType String Lat
attribute latitude actual_range double -89.99583333333334, 89.99583333333334
attribute latitude axis String Y
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
dimension longitude   double nValues=43200, evenlySpaced=true, averageSpacing=0.008333333333333333
attribute longitude _CoordinateAxisType String Lon
attribute longitude actual_range double -179.99583333333334, 179.99583333333334
attribute longitude axis String X
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable z   short latitude, longitude
attribute z _FillValue short -32768
attribute z colorBarMaximum double 8000.0
attribute z colorBarMinimum double -8000.0
attribute z colorBarPalette String Topography
attribute z coordsys String geographic
attribute z ioos_category String Location
attribute z long_name String Altitude
attribute z positive String up
attribute z standard_name String altitude
attribute z units String m

This information is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.
 


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