Identification_Information: Citation: Citation_Information: Originator: Gulf States Marine Fisheries Commission Originator: University of Colorado Originator: University of New Orleans Publication_Date: 2007 Title: Marine Benthic Substrates Griddings, Northern Gulf of Mexico Geospatial_Data_Presentation_Form: Raster digital data Online_Linkage: None Larger_Work_Citation: Citation_Information: Originator: J. Rester Originator: C.J. Jenkins Originator: M. Bethel Publication_Date: Aug 2007 Title: Marine Benthic Substrates Griddings, Northern Gulf of Mexico Series_Information: Series_Name: None Issue_Identification: None Publication_Information: Publication_Place: Gulf States Marine Fisheries Commission Online_Linkage: None Description: Abstract: This is a compilation of diverse data sets, describing the nature of seabed materials. The data is in the form of ESRI griddings. Purpose: To improve the quality of information on seafloor substrates and habitats. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: Aug 2007 Currentness_Reference: The input data range over many years of surveys. Status: Progress: In work Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -98.18800 East_Bounding_Coordinate: -80.36800 North_Bounding_Coordinate: 31.02500 South_Bounding_Coordinate: 23.36500 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: dbSEABED Theme_Keyword: benthic Theme_Keyword: marine Theme_Keyword: habitat Theme_Keyword: grain size Theme_Keyword: seabed Theme_Keyword: seafloor Theme_Keyword: sediment data Theme_Keyword: texture Theme_Keyword: GSMFC Theme_Keyword: INSTAAR Theme_Keyword: PIES Place: Place_Keyword_Thesaurus: General Place_Keyword: Gulf of Mexico Place_Keyword: Gulf Coast Place_Keyword: United States Place_Keyword: Florida Place_Keyword: Alabama Place_Keyword: Mississippi Place_Keyword: Louisiana Place_Keyword: Texas Access_Constraints: Under moratorium till review and public release Use_Constraints: Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jeff Rester Contact_Organization: Gulf States Marine Fisheries Commission Contact_Position: Fisheries Biologist Contact_Address: Address_Type: mailing address Address: P.O. Box 726 City: Ocean Springs State_or_Province: MS Postal_Code: 39566-0726 Country: USA Contact_Voice_Telephone: +1-228-875-5912 Contact_Facsimile_Telephone: +1-228-875-6604 Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Dr Chris Jenkins Contact_Organization: INSTAAR University of Colorado Contact_Position: Senior Research Scientist Contact_Address: Address_Type: mailing address Address: Box UCB 450 City: Boulder State_or_Province: CO Postal_Code: 80309-0450 Country: USA Contact_Voice_Telephone: +1-303-492-6387 Contact_Facsimile_Telephone: +1-303-492-6388 Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Dr Mark Kulp Contact_Organization: PIES University of New Orleans Contact_Position: Assistant Professor Contact_Address: Address_Type: mailing address Address: PIES, University of New Orleans City: New Orleans State_or_Province: LA Postal_Code: 70148 Country: USA Contact_Voice_Telephone: +1-504-280-4020 Contact_Facsimile_Telephone: +1-504-280-4022 Data_Set_Credit: We particularly thank the individuals and institutions who performed the original studies, collecting and collating field and laboratory data. Native_Data_Set_Environment: Microsoft Windows XP Native_Data_Set_Environment: ESRI ArcMap 9.x ArcView 3.x Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Accuracy of each attribute is dependent on the accuracy of the lineage data. Logical_Consistency_Report: Data in usSEABED are based on the observations and analyses of others, filtered through integrating and quality-controlling software. Each source report varies in type of information/data recorded and format. Completeness_Report: Additional useable data may exist in this area; the authors appreciate any additional information. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Locational accuracy is dependent on the accuracy of the navigation for the lineage data. That may vary widely from 0.005 km using differential GPS in recent surveys, to greater than 2 km based on radar, LORAN, or dead reckoning in older surveys. While every endeavour has been made to correct for the effects of map projections and spheroids in the lineage data, this has not been possible in all cases. Users of the data should use their own criteria for assessing the accuracy of the locations. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Locational accuracy is dependent on the accuracy of the navigation for the lineage data. In most cases no corrections for tide, surge, vertical datums, or acoustic velocities is made. Users of the data should use their own criteria for assessing the accuracy of the locations. Lineage: Source_Information: Source_Scale_Denominator: See separate listing within this publication for specific sources and associated metadata Type_of_Source_Media: Various hard copy documents and digital files Source_Contribution: Point, polygon, polyline, and raster locations. Descriptions and analytical data on many different types of sediment and rock materials, benthos, and undersea features. Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point, polygon and raster Point_and_Vector_Object_Count: 51290 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.02 Longitude_Resolution: 0.02 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: WGS84, World Geodetic System Ellipsoid_Name: WGS 84 Semi-major_Axis: 6378137.0 m Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Detailed_Description: Attribute: Attribute_Label: Value Attribute_Definition: Value of grid attribute. Attribute_Definition_Source: dbSEABED Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Overview_Description: Entity_and_Attribute_Overview: The No Data value is specified in grid headers. Entity_and_Attribute_Overview: The attributes are denoted by the grid filenames: gsm_gvl - sediment gravel fraction content (% weight); Spatial Analyst IDW fixed 8mi radius interpolation; clipped with gsm_sea gsm_mud - sediment mud fraction content (% weight); competant interpolation gsm_mudu - uncertainty in sediment mud contents (% weight); competant interpolation gsm_rck - substrate rock presence (% exposure); Spatial Analyst IDW fixed 4mi radius interpolation; clipped with gsm_sea gsm_sea - 1 for sea areas, "No Data" for land areas; shapefile to raster conversion; based on public ESRI land outline country02 gsm_snd - sediment sand fraction content (% weight); Spatial Analyst IDW fixed 16mi radius interpolation; clipped with gsm_sea Metadata_Reference_Information: Metadata_Date: 31 Aug 2007 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Dr Chris Jenkins Contact_Organization: INSTAAR University of Colorado Contact_Position: Senior Research Scientist Contact_Address: Address_Type: mailing address Address: Box UCB 450 City: Boulder State_or_Province: CO Postal_Code: 80309-0450 Country: USA Contact_Voice_Telephone: +1-303-735-5250 Contact_Facsimile_Telephone: +1-303-492-6388 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: None Metadata_Use_Constraints: None Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile