Identification_Information: Citation: Citation_Information: Originator: VeeAnn A. Cross Publication_Date: 2014 Title: IRB_BATHY_GEO.TIFF: Depth-colored GeoTIFF image of the bathymetry of Indian River Bay, Delaware, generated from fathometer data acquired in April 2010 during U.S. Geological Survey Field Activity 2010-006-FA (Geographic, WGS 84) Edition: 1 Geospatial_Data_Presentation_Form: remote-sensing image Series_Information: Series_Name: Open-File Report Issue_Identification: 2011-1039 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2011/1039/data/basemap/irb_bathy_geo.zip Online_Linkage: http://pubs.usgs.gov/of/2011/1039/html/ofr2011-1039-catalog.html Larger_Work_Citation: Citation_Information: Originator: V.A. Cross Originator: J.F. Bratton Originator: H.A. Michael Originator: K.D. Kroeger Originator: A. Green Originator: E. Bergeron Publication_Date: 2014 Title: Continuous Resistivity Profiling and Seismic-Reflection Data Collected in April 2010 from Indian River Bay, Delaware Edition: 1 Series_Information: Series_Name: Open-File Report Issue_Identification: 2011-1039 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2011/1039/ Online_Linkage: http://dx.doi.org/10.3133/ofr20111039 Description: Abstract: A geophysical survey to delineate the fresh-saline groundwater interface and associated sub-bottom sedimentary structures beneath Indian River Bay, Delaware, was carried out in April 2010. This included surveying at higher spatial resolution in the vicinity of a study site at Holts Landing, where intensive onshore and offshore studies were subsequently completed. The total length of continuous resistivity profiling (CRP) survey lines was 145 kilometers (km), with 36 km of chirp seismic lines surveyed around the perimeter of the bay. Medium-resolution CRP surveying was performed using a 50-meter streamer in a bay-wide grid. Results of the surveying and data inversion showed the presence of many buried paleochannels beneath Indian River Bay that generally extended perpendicular from the shoreline in areas of modern tributaries, tidal creeks, and marshes. An especially wide and deep paleochannel system was imaged in the southeastern part of the bay near White Creek. Many paleochannels also had high-resistivity anomalies corresponding to low-salinity groundwater plumes associated with them, likely due to the presence of fine-grained estuarine mud and peats in the channel fills that act as submarine confining units. Where present, these units allow plumes of low-salinity groundwater that was recharged onshore to move beyond the shoreline, creating a complex fresh-saline groundwater interface in the subsurface. The properties of this interface are important considerations in construction of accurate coastal groundwater flow models. These models are required to help predict how nutrient-rich groundwater, recharged in agricultural watersheds such as this one, makes its way into coastal bays and impacts surface water quality and estuarine ecosystems. For more information on the survey conducted for this project, see http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2010-006-FA. Purpose: The purpose of this dataset is to provide a color GeoTIFF image in the geographic, WGS84 coordinate system of the tide corrected bathymetric grid for the Indian River Bay. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20100412 Ending_Date: 20100415 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -75.207119 East_Bounding_Coordinate: -75.060608 North_Bounding_Coordinate: 38.621180 South_Bounding_Coordinate: 38.565589 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Theme_Keyword: Field Activity Number 2010-006-FA Theme_Keyword: Info Bank ID K-6-10-DL Theme_Keyword: bathymetry Theme_Keyword: Lowrance GPS Theme_Keyword: GeoTIFF Theme_Keyword: depth-colored image Theme_Keyword: TIFF Theme_Keyword: image Theme_Keyword: Open-file Report 2011-1039 Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: elevation Theme_Keyword: oceans Theme_Keyword: oceans and estuaries Theme_Keyword: oceans and coastal Place: Place_Keyword_Thesaurus: General Place_Keyword: North America Place_Keyword: North Atlantic Ocean Place_Keyword: United States Place_Keyword: Delaware Place_Keyword: Indian River Bay Place_Keyword: Indian River Inlet Place_Keyword: Holts Landing Place_Keyword: Piney Neck Place_Keyword: Sussex County Place_Keyword: Rosedale Beach Access_Constraints: None. Use_Constraints: Not to be used for navigation. The public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: Woods Hole Coastal and Marine Science Center Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2251 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2011/1039/data/basemap/irb_bathy_geo.gif Browse_Graphic_File_Description: Thumbnail GIF image showing the color-coded bathymetry in Indian River Bay. The coastline is included for spatial reference. Browse_Graphic_File_Type: GIF Native_Data_Set_Environment: Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4095 Data_Quality_Information: Logical_Consistency_Report: All the data were evaluated with the same criteria. Completeness_Report: This GeoTIFF image represents all the valid fathometer readings recorded by the HYPACK navigation software, plus some bathymetric readings recorded by the continuous resistivity profile system when the HYPACK system was not logging data. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The navigation system used was a Lowrance 480M with an LGC-2000 Global Positioning System (GPS) antenna. The antenna was located directly above the fathometer transducer mount point. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: All collected bathymetry values were collected by the 200 kHz Lowrance fathometer. The fathometer was mounted starboard side aft, directly below the GPS antenna and the resistivity streamer tow point. The Lowrance manufacturer indicates the speed of sound used by the system to convert to depths is 4800 feet/second. All values are assumed to be accurate to within 1 meter. The gridding, grid smoothing, and other processing affects the accuracy of individual cell values as these data were not collected with the intention of generating a grid and have areas of sparse coverage. This image does not actually have depth values. The colormap of the image is used to indicate depths where red indicates teh shallowest areas. Then moving to deeper water indicated by hellow, greens and darkblue (for the deepest water). Lineage: Process_Step: Process_Description: Used Mirone version 1.5.0 standalone software to read the binary grid (irb_bathy). Used Image - Color Palettes - Change Palette to choose an appropriate color scale and stetch the bottom of the color range to account for the large amount of shallow data. Then File - Save Image As - GeoTIFF. Output file to irb_bathy.tif and selected the option to preserve image original size. This process step, along with all subsequent process steps, was performed by the same person: VeeAnn A. Cross. Source_Used_Citation_Abbreviation: irb_bathy Process_Date: 201103 Source_Produced_Citation_Abbreviation: irb_bathy.tif Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2251 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Process_Step: Process_Description: Used GeoTIFF Examine to write the header information from the GeoTIFF to a TIFF world file. Source_Used_Citation_Abbreviation: irb_bathy.tif Process_Date: 201103 Source_Produced_Citation_Abbreviation: irb_bathy.tfw Process_Step: Process_Description: Loaded the UTM image into ArcMap 9.2, then right-mouse click - data -export. Used the extent of the raster dataset and the spatial reference of the data fram (geographic, WGS84). Set the format to TIFF and saved the image as irb_bathy_geo.tif. Source_Used_Citation_Abbreviation: irb_bathy.tif Process_Date: 201103 Source_Produced_Citation_Abbreviation: irb_bathy_geo.tif Process_Step: Process_Description: Used GeoTIFF Examine to write the header information from the GeoTIFF to a TIFF world file. Source_Used_Citation_Abbreviation: irb_bathy_geo.tif Process_Date: 201103 Source_Produced_Citation_Abbreviation: irb_bathy_geo.tfw Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 218 Column_Count: 731 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000255 Longitude_Resolution: 0.000200 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 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: National Geodetic Vertical Datum of 1929 Altitude_Resolution: 0.1 Altitude_Distance_Units: meters Altitude_Encoding_Method: Implicit coordinate Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: irb_bathy_geo.tif.vat Attribute: Attribute_Label: ObjectID 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: Value Attribute: Attribute_Label: Red Attribute: Attribute_Label: Green Attribute: Attribute_Label: Blue Attribute: Attribute_Label: Opacity Attribute: Attribute_Label: Count Overview_Description: Entity_and_Attribute_Overview: This image is based on a bathymetry grid which is in meters in the vertical datum of NGVD29. Based on the NOAA website (http://www.ngs.noaa.gov/cgi-bin/VERTCON/vert_con.prl accessed October 2010) the conversion from NGVD29 to NAVD88 is -0.238 meters at both the Indian River Inlet tide station and the Rosedale Beach tide station. This indicates a direct offset of the whole grid will convert to NAVD88. So taking this grid and subtracting 0.238 meters will yield a grid with the vertical datum NAVD88. The colormap in the image uses red to indicate the shallowest areas. Then moving to deeper water - yellow, greens, and dark blue is the deepest. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: Woods Hole Coastal and Marine Science Center Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2251 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Resource_Description: Downloadable Data Distribution_Liability: Neither the U.S. government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. 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. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: GeoTIFF Format_Information_Content: The WinZip (v. 14) file contains the GeoTIFF image and TIFF world file as well as the associated metadata files. Transfer_Size: 0.06 MB Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2011/1039/data/basemap/irb_bathy_geo.zip Network_Resource_Name: http://pubs.usgs.gov/of/2011/1039/html/ofr2011-1039-catalog.html Network_Resource_Name: http://dx.doi.org/10.3133/ofr20111039 Fees: None. Technical_Prerequisites: This zip file contains data available in GeoTIFF format with an accompanying TIFF world file. The user must have software capable of uncompressing the zip file and reading/displaying the image. Metadata_Reference_Information: Metadata_Date: 20140630 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: VeeAnn A. Cross Contact_Organization: U.S. Geological Survey Contact_Position: Marine Geologist Contact_Address: Address_Type: mailing and physical address Address: Woods Hole Coastal and Marine Science Center Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2251 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile