{94DB113C-D740-44ED-ADF6-2D1CC8351D97}2006011707315400FALSE20060209133819002006020913381900Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535enThe National Geophysical Data Center assembled a gridded database referred to as the Coastal Relief Model (CRM). NGDC created the comprehensive data set by merging the U.S. Geological Survey 3-arc-second DEMs with a compilation of hydrographic soundings covering the Gulf of Mexico. The Coastal Relief Model extends from the coastal state boundaries to as far offshore as the data will support a continuous view of the seafloor. This dataset formed the basis for the creating of the CRM bathymetry image for this product's GIS.This image provides a color view of the CRM for the project area and is used as a basemap for overlaying usSEABED data.2006Gmx_grd8bit.sidremote-sensing imagehttp://pubs.usgs.gov/ds/2006/146/basemaps/gmx_grd/gmx_grd.zipBrian J. BuczkowskiB.J. BuczkowskiJ.A. ReidC.J. JenkinsJ.M. ReidS.J. WilliamsJ.G. Flocks2006Data Series146Woods Hole Science Center, Woods Hole, MAU.S. Geological Survey, Coastal and Marine Geology Programhttp://pubs.usgs.gov/ds/2006/146publication date2001CompleteNone planned-99.043833-79.46700031.53966724.827500-100.000038-77.99920920.31742934.683376GeneralU.S. Geological SurveyUSGSCoastal and Marine Geology ProgramCMGPNational Geophysical Data CenterCoastal Relief ModelGeographic Information SystemGISMr Sid imageCRMbathymetryMarine Aggregate Resources and ProcessesWoods Hole Science CenterUnited States Gulf CoastU.S. Gulf CoastU.S. southGulf of MexicoUnited StatesGeneralNorth AmericaPublic domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.Bathymetry is not to be used for navigation purposes.Raster DatasetBrian J. BuczkowskiU.S. Geoogical SurveyCore Curator and Data Management Specialistmailing and physical address

USGS Woods Hole Science Center

Woods HoleMA02543-1598USA508-458-8700 x2361508-457-2310bbuczkowski@usgs.govgmx_grd.jpgImage showing extent of data layer coverageJPEGNational Oceanic and Atmospheric Administration (NOAA), National Geophysical Data Center (NGDC)200109074.1http://www.ngdc.noaa.gov/mgg/coastal/coastal.htmlMicrosoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535Gmx_grd8bit.sid-100.000038-77.99920934.68337620.3174291enFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998local timemailing and physical addressWoods HoleMA02543-1598

384 Woods Hole Road

USA508-458-8700 x2361Brian J. BuczkowskiU.S. Geological SurveyCore Curator and Data Management Specialist508-457-2310bbuczkowski@usgs.gov20060209NoneNonehttp://www.esri.com/metadata/esriprof80.htmlESRI Metadata ProfileISO 19115 Geographic Information - MetadataDIS_ESRI1.0datasetDownloadable Data; Marine Aggregate Resources and Processes: gmx_grd8bit.sid0.8620.862Mr Sid Although this data set has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.002file://\\BRIBUCDTXP\C$\Publications\DS 146\basemaps\gmx_grd\Gmx_grd8bit.sidLocal Area Network0.862Raster DatasetRasterPixel440467450.0032620.00326281Upper LeftFALSEWavelet3pixel codesTRUEMrSID2167450.003262unknown44040.003262unknownDecimal degreesNorth American Datum of 1983Geodetic Reference System 806378137.000000298.257222row and column0.0032620.003262Band_1Table256ObjectIDObjectIDOID400Internal feature number.ESRISequential unique whole numbers that are automatically generated.ValueValueInteger000CountCountInteger000Band_2Table256ObjectIDObjectIDOID400Internal feature number.ESRISequential unique whole numbers that are automatically generated.ValueValueInteger000CountCountInteger000Band_3Table256ObjectIDObjectIDOID400Internal feature number.ESRISequential unique whole numbers that are automatically generated.ValueValueInteger000CountCountInteger00020060209CD-ROMNGDC CRM, Florida and Eastern Gulf of Mexico, Vol 3Vols 3, 4 and 5 were combined to create the raster grid of the Gulf of MexicoCD-ROMNGDC CRM, Central Gulf of Mexico, Vol 4 Vols 3, 4 and 5 were combined to create the raster grid of the Gulf of MexicoCD-ROMNGDC CRM, Western Gulf of Mexico, Vol 5 Vols 3, 4 and 5 were combined to create the raster grid of the Gulf of MexicoBrian J. BuczkowskiU.S. Geological SurveyCore Curator and Data Management Specialistmailing and physical address

384 Woods Hole Road

Woods HoleMA02543-1598USA508-458-8700 x2361508-457-2310bbuczkowski@usgs.govThe desired data was extracted from the Coastal Relief Model volumes 3, 4 and 5 in the ESRI ASCII format. The ASCII dataset was then converted to an ESRI grid file and combined to a single ESRI grid file.gmx_mrgThe grid was hillshaded, usisng ArcMap 3D Analyst .gmx_mrgGmx_mrg_hlshdgmx_mrgThe grids gmx_mrg and gmx_mrg_hlshd were overlain and made transparent so the hillshade may be seen beneath the bathymetry directly extracted for the Coastal Relief Model.gmx_mrg_hlshdgmx_mrggmx_mrg_hlshdgmx_grd.tifThe grid was converted to a tiff image using the extension image_convert_georef.avx downloaded from www.esri.com.gmx_mrggmx_grd.tfwgmx_mrg_hlshdgmx_grd.tifgmx_grd8bit.tifThe tiff image was converted to 8 bit using Photoshop CS in order to reduce the file size.gmx_grd.tfwgmx_grd8bit.tfwgmx_grd8bit.tifgmx_grd8bit.sidThe tiff image was compressed using Lizardtech's Mr. Sid compression software.gmx_grd8bit.tfwgmx_grd8bit.sdw