srtm15plus_Lon0360 eng UTF8 dataset service Roy Mendelssohn NOAA NMFS SWFSC Environmental Research Division +1 831-420-3666 110 McAllister Road Santa Cruz CA 95060 USA erd.data@noaa.gov pointOfContact 2026-04-12 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) 2 column 86400 0.004166666666666667 row 43201 0.004166666666666667 area SRTM15_PLUS Estimated Topography, 15 seconds, Global, v1, Lon0360 2026-04-12 creation coastwatch.pfeg.noaa.gov srtm15plus_Lon0360 David T. Sandwell SIO, NOAA, U.S. Navy, NGA, GEBCO dsandwell@ucsd.edu https://topex.ucsd.edu/WWW_html/srtm30_plus.html information web browser Background Information Background information from the source information originator One GMT file, topo15.grd, with the entire global topography. The grid resolution is 15 seconds which is roughly 0.27km 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 (https://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 (https://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 ( https://www.gmrt.org/ ), the JAMSTEC Data Site for Research Cruises (https://www.godac.jamstec.go.jp/darwin/e), and the NGDC Coastal Relief Model (https://www.ngdc.noaa.gov/mgg/coastal/coastal.html). Arctic bathymetry is from the International Bathymetric Chart of the Oceans (IBCAO) (https://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. David T. Sandwell SIO, NOAA, U.S. Navy, NGA, GEBCO dsandwell@ucsd.edu https://topex.ucsd.edu/WWW_html/srtm30_plus.html information web browser Background Information Background information from the source information pointOfContact bathymetry Becker data DEM elevation estimated global GMT Sandwell seconds Smith topex topo15 topography ucsd v11 theme SIO, NOAA, U.S. Navy, NGA, GEBCO project latitude longitude altitude theme CF Standard Name Table v70 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 15 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. SIO, NOAA, U.S. Navy, NGA, GEBCO largerWorkCitation project Unidata Common Data Model Grid largerWorkCitation project eng geoscientificInformation 1 -180.0 180.0 -90.0 90.0 SRTM15_PLUS Estimated Topography, 15 seconds, Global, v1, Lon0360 2026-04-12 creation David T. Sandwell SIO, NOAA, U.S. Navy, NGA, GEBCO dsandwell@ucsd.edu https://topex.ucsd.edu/WWW_html/srtm30_plus.html information web browser Background Information Background information from the source information originator One GMT file, topo15.grd, with the entire global topography. The grid resolution is 15 seconds which is roughly 0.27km 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 (https://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 (https://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 ( https://www.gmrt.org/ ), the JAMSTEC Data Site for Research Cruises (https://www.godac.jamstec.go.jp/darwin/e), and the NGDC Coastal Relief Model (https://www.ngdc.noaa.gov/mgg/coastal/coastal.html). Arctic bathymetry is from the International Bathymetric Chart of the Oceans (IBCAO) (https://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. ERDDAP griddap 1 -180.0 180.0 -90.0 90.0 tight ERDDAPgriddapDatasetQueryAndAccess https://coastwatch.pfeg.noaa.gov/erddap/griddap/srtm15plus_Lon0360 ERDDAP:griddap ERDDAP-griddap ERDDAP's griddap service (a flavor of OPeNDAP) for gridded data. Add different extensions (e.g., .html, .graph, .das, .dds) to the base URL for different purposes. download SRTM15_PLUS Estimated Topography, 15 seconds, Global, v1, Lon0360 2026-04-12 creation David T. Sandwell SIO, NOAA, U.S. Navy, NGA, GEBCO dsandwell@ucsd.edu https://topex.ucsd.edu/WWW_html/srtm30_plus.html information web browser Background Information Background information from the source information originator One GMT file, topo15.grd, with the entire global topography. The grid resolution is 15 seconds which is roughly 0.27km 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 (https://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 (https://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 ( https://www.gmrt.org/ ), the JAMSTEC Data Site for Research Cruises (https://www.godac.jamstec.go.jp/darwin/e), and the NGDC Coastal Relief Model (https://www.ngdc.noaa.gov/mgg/coastal/coastal.html). Arctic bathymetry is from the International Bathymetric Chart of the Oceans (IBCAO) (https://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. OPeNDAP 1 -180.0 180.0 -90.0 90.0 tight OPeNDAPDatasetQueryAndAccess https://coastwatch.pfeg.noaa.gov/erddap/griddap/srtm15plus_Lon0360 OPeNDAP:OPeNDAP OPeNDAP An OPeNDAP service for gridded data. Add different extensions (e.g., .html, .das, .dds) to the base URL for different purposes. download SRTM15_PLUS Estimated Topography, 15 seconds, Global, v1, Lon0360 2026-04-12 creation David T. Sandwell SIO, NOAA, U.S. Navy, NGA, GEBCO dsandwell@ucsd.edu https://topex.ucsd.edu/WWW_html/srtm30_plus.html information web browser Background Information Background information from the source information originator One GMT file, topo15.grd, with the entire global topography. The grid resolution is 15 seconds which is roughly 0.27km 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 (https://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 (https://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 ( https://www.gmrt.org/ ), the JAMSTEC Data Site for Research Cruises (https://www.godac.jamstec.go.jp/darwin/e), and the NGDC Coastal Relief Model (https://www.ngdc.noaa.gov/mgg/coastal/coastal.html). Arctic bathymetry is from the International Bathymetric Chart of the Oceans (IBCAO) (https://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. Open Geospatial Consortium Web Map Service (WMS) 1 -180.0 180.0 -90.0 90.0 tight GetCapabilities https://coastwatch.pfeg.noaa.gov/erddap/wms/srtm15plus_Lon0360/request?service=WMS&version=1.3.0&request=GetCapabilities OGC:WMS OGC-WMS Open Geospatial Consortium Web Map Service (WMS) download physicalMeasurement z float Altitude Roy Mendelssohn NOAA NMFS SWFSC Environmental Research Division +1 831-420-3666 110 McAllister Road Santa Cruz CA 95060 USA erd.data@noaa.gov distributor OPeNDAP DAP/2.0 https://coastwatch.pfeg.noaa.gov/erddap/griddap/srtm15plus_Lon0360.html order Data Subset Form ERDDAP's version of the OPeNDAP .html web page for this dataset. Specify a subset of the dataset and download the data via OPeNDAP or in many different file types. download https://coastwatch.pfeg.noaa.gov/erddap/griddap/srtm15plus_Lon0360.graph order Make-A-Graph Form ERDDAP's Make-A-Graph .html web page for this dataset. Create an image with a map or graph of a subset of the data. mapDigital dataset grdconvert topo15.grd topo15_compressed.nc=ns (old cmd) grdmath -V -fg /geosat2/srtm15_data/land//land.grd /geosat2/srtm15_data/topo//debug/polished.grd AND = /geosat2/srtm15_data/topo//world.grd This record was created from dataset metadata by ERDDAP Version 2.30.0