Metadata: Identification_Information: Citation: Citation_Information: Originator: Timothy O. Hodson Originator: Guy R. Cochrane Originator: Ross D. Powell Publication_Date: 2013 Title: FishObs shapefile in Marine Benthic Habitat Mapping of the West Arm, Glacier Bay National Park and Preserve, Alaska Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: SIM 3253 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Larger_Work_Citation: Citation_Information: Originator: Timothy O. Hodson Originator: Guy R. Cochrane Originator: Ross D. Powell Publication_Date: 2013 Title: Marine Benthic Habitat Mapping of the West Arm, Glacier Bay National Park and Preserve, Alaska Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: SIM 3253 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/sim/3253/ Description: Abstract: This data set contains sea floor observations collected using camera sled and ROV. Observations at each point included primary and secondary substrate type, substrate complexity, sea floor slope, benthic biomass, the presence of benthic organisms and demersal fish, and small-scale sea-floor features. Purpose: Groundtruthing for geoform and surface geology mapping. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 201009 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -137.127671 East_Bounding_Coordinate: -136.226536 North_Bounding_Coordinate: 59.058873 South_Bounding_Coordinate: 58.670272 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: seafloor geology Theme_Keyword: substrates Theme_Keyword: glacial sedimentation Theme_Keyword: glacimarine processes Theme: Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > BENTHIC HABITAT Theme_Keyword: EARTH SCIENCE > LAND SURFACE > GEOMORPHOLOGY Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE SEDIMENTS > SEDIMENTATION > PROXIMAL GLACIMARINE Theme: Theme_Keyword_Thesaurus: GCMD INSTRUMENT Theme_Keyword: CTD > CONDUCTIVITY, TEMPERATURE, DEPTH Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificinformation Theme_Keyword: imageryBaseMapsEarthCover Theme_Keyword: inlandWaters Theme_Keyword: oceans Place: Place_Keyword_Thesaurus: General Place_Keyword: West Arm Place_Keyword: Southeast Alaska Place_Keyword: USA Place_Keyword: Marine reserve Place: Place_Keyword_Thesaurus: Geographic Names Information System Place_Keyword: Tarr Inlet Place_Keyword: Glacier Bay National Park and Preserve and Preserve Place_Keyword: Glacier Bay Place_Keyword: Alaska Access_Constraints: None Use_Constraints: Please recognize the U.S. Geological Survey (USGS) as the source of this information. Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. This information is not intended for navigational purposes. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: general location map Browse_Graphic_File_Type: JPEG Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcGIS 10.0.0.2414 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Refer to accompanying SIM pamphlet or contact authors for an explanation of the accuracy of the identification of the entities and assignments of values in the data set and a description of the tests used. Logical_Consistency_Report: Refer to accompanying SIM pamphlet or contact authors for an explanation of the fidelity of relationships in the data set and tests used. Completeness_Report: Refer to accompanying SIM pamphlet or contact authors for information about omissions, selection criteria, generalization, definitions used, and other rules used to derive the data set. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Refer to accompanying SIM pamphlet or contact authors for an explanation of the accuracy of the horizontal coordinate measurements and a description of the tests used. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Refer to accompanying SIM pamphlet or contact authors for an explanation of the accuracy of the vertical coordinate measurements and a description of the tests used. Lineage: Process_Step: Process_Description: Ground-truthing operations were conducted aboard the R/V Stellar in late August and early June of 2010. USGS sea floor observations, collected via towed video sled, provided the primary ground-truthing source for this study (The cruise report is available online at http://walrus.wr.usgs.gov/infobank/s/st310gb/html/s-t3-10-gb.meta.html). Transects were selected to ground-truth across the full spectrum of depth, slope, and rugosity observed in the multibeam bathymetry. Selection was oriented toward resolving both common and unique features of the sea floor, and examining regions of transition between different substrate types. Video observations were subsequently used to construct maps of substrate type and habitat distribution. The video sled was equipped with forward- and downward-facing video cameras, lights, altimeter, and a pressure (depth) sensor. Two down-pointing lasers, spaced 20 cm apart, provided scale in the sea floor imagery. The sled was towed behind the surface vessel at speeds of 0.5 -1.5 k, generally operating at an altitude between 1-2 m above the sea floor. Video footage was recorded to digital mini-DV tape, which was continuously imprinted with altitude, pitch, roll, water depth, ship latitude and longitude, ship speed, ship heading, and Greenwich Mean Time. Ship position was determined by differential geographic positioning system (dGPS). All instrument data were multipexed through a sub-sea housing and transmitted by the 12-conductor cable to a topside console. Real-time sea floor observations were recorded using an "X-Keys" programmable keypad at 1-minute intervals during each transect using the methodology of Anderson and others (2008). Time (GMT), ship position, and other ship data were automatically recorded each time an observation event was entered. Positional data in the observation file were later corrected to true sled position, determined using a Linkquest Tracklink 1500, which provided sled position relative to the ship-board dGPS. Observations at each point included primary and secondary substrate type (for example, mud/mud, boulder/cobble), substrate complexity (rugosity), sea floor slope, benthic biomass, the presence of benthic organisms and demersal fish, and small-scale sea-floor features (for example, tracks and burrows). In areas of complex bathymetry and substrate, the limited maneuverability granted by the tow sled was often insufficient for reliable and continuous data collection. Such transects were completed using a Benthos Stingray ROV. Due to the limited range imposed by the 400 m umbilical, the ROV occupied an auxiliary role during ground-truthing investigations. The buoyancy provided by the Stingray platform was inadequate for the equipment of the Tracklink positioning transducer . As a result, ROV observations are given with ship position only. Since the ROV was tethered to a clump weight lowered beneath the ship, true ROV position is constrained to within ~100 m of the ship's position. In addition to the sea floor video transects, 127 bottom-grab samples (available in the NGDC's Index to Marine & Lacustrine Geological Samples ), seismic-reflection profiles (Cowan and others, 1994 and Cai, 1994 ), and Landsat imagery also aided in the interpretation of the multibeam data. In particular, an understanding of modern processes active in the glacimarine environment was fundamental to our interpretations, especially in areas of poor coverage. Process_Date: 2010 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey (USGS) Contact_Person: Guy R. Cochrane Contact_Address: Address_Type: mailing and physical Address: 400 Natural Bridges Dr City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Contact_Voice_Telephone: (831) 427-4754 Contact_Electronic_Mail_Address: gcochrane@usgs.gov 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 Point_and_Vector_Object_Count: 24 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: FishObs Entity_Type_Definition: Refer to accompanying SIM pamphlet or contact authors for the description of the entity type. Entity_Type_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Overview_Description: Entity_and_Attribute_Overview: Refer to accompanying SIM pamphlet or contact authors for complete description of the following attributes and their values in the data set. > >Start_of_Ent: start of entry > >Time: time atstart of entry > >Longitude: longitude at start of entry > >Latitude: latitude at start of entry > >Heading: heading at start of entry > >Course: course at start of entry > >Speed: speed at start of entry > >End_of_Ent: end of entry > >Time: time at end of entry > >Longitude: longitude at end of entry > >Latitude: latitude at end of entry > >Heading: heading at end of entry > >Course: course at end of entry > >Speed: speed at end of entry > >Log_Entry: seafloor observations > Entity_and_Attribute_Detail_Citation: Hodson, Timothy O., Cochrane, Guy R., and Powell, Ross D., 2013, Marine Benthic Habitat Mapping of the West Arm, Glacier Bay National Park and Preserve, Alaska: U.S. Geological Survey Scientific Investigations Map 3253, . Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey (USGS) Contact_Person: Guy R. Cochrane Contact_Address: Address_Type: mailing and physical Address: 400 Natural Bridges Dr City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Contact_Voice_Telephone: (831) 427-4754 Contact_Electronic_Mail_Address: gcochrane@usgs.gov Resource_Description: U.S. Geological Survey Scientific Investigations Map 3253 Distribution_Liability: Please recognize the U.S. Geological Survey (USGS) as the source of this information. Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: SHP Format_Version_Number: 10.0 Format_Specification: ESRI shapefile Format_Information_Content: The SHP file contains the geospatial data. The SHX file contains the index of the geospatial data. The DBF file contains the attribute data in dBASE format. The PRJ file contains the coordinate system information (optional). The AVL file contains the legend information (optional). The SBN and SBX files contain the spatial index of the geospatial data (optional). The XML file contains the metadata describing the data set .shp.xml. File_Decompression_Technique: zip Transfer_Size: 0.001 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/sim/3253/ Fees: none Technical_Prerequisites: These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of the importing data. A free data viewer, arcexplorer, capable of displaying the data is available from ESRI at www.esri.com. Metadata_Reference_Information: Metadata_Date: 20130307 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: United States Geological Survey (USGS) Coastal and Marine Geology Program (CMGP) Contact_Person: Guy R. Cochrane Contact_Position: Geophysicist Contact_Address: Address_Type: mailing and physical address Address: USGS, 400 Natural Bridges Drive City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Country: USA Contact_Voice_Telephone: (831) 427-4754 Contact_Facsimile_Telephone: (831) 427-4748 Contact_Electronic_Mail_Address: gcochrane@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata ("CSDGM version 2") Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: none