one meter bathymetry contours offshore Sarasota, FL

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Dave Twichell(comp.)

Publication_Date: 19990602

Title: one meter bathymetry contours offshore Sarasota, FL

Publication_Information:

Publication_Place: Woods Hole Field Center

Publisher: USGS, Coastal and Marine Geology Team

Description:

Abstract:

The U.S. Geological Survey, in cooperation with the University of South Florida and Eckerd College, completed a bathymetric, sidescan sonar, high-resolution seismic-reflection, and surface sediment sampling survey of the inner shelf environment along the western Florida coast. The survey area extends 15km from Sarasota Point to Buttonwood Harbor. This study is part of a larger program initiated by the U.S. Geological Survey to map the geologic framework and monitor the modern processes that affect the western Florida coastal zone. This portion of the project included a reconnaissance high-resolution seismic and side-scan sonar surveys of the entire study area, detailed mapping to identify patterns of hard grounds and sediment cover, and coring of sediments to document historical development of the inner shelf and coastal system.

Purpose:

This GIS overlay is a component of the Sarasota, Florida ArcView GIS database and contains the computer generated one meter bathymetry contours for the Sarasota study area.

Supplemental_Information:

Isobath contours range from 4 to 12m. Depth values were recorded in decimeters to provide somewhat more data resolution in the shallow field study. Because values are recorded in decimeters a depth value of 80 would be equivalent to a depth of 8.0m.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19940502

Ending_Date: 19940508

Currentness_Reference: Ground Condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -82.7306

East_Bounding_Coordinate: -82.5687

North_Bounding_Coordinate: 27.3855

South_Bounding_Coordinate: 27.2209

Keywords:

Theme:

Theme_Keyword_Thesaurus: General

Theme_Keyword: U.S. Geological Survey

Theme_Keyword: Woods Hole Field Center

Theme_Keyword: R/V BELLOWS

Theme_Keyword: BLWS 95-04

Theme_Keyword: May 2-8, 1995

Theme_Keyword: vector

Theme_Keyword: complete chain

Theme_Keyword: ArcView

Theme_Keyword: shapefile

Theme_Keyword: bathymetry contours

Theme_Keyword: isobath

Theme_Keyword: one meter

Theme_Keyword: 1m

Theme_Keyword: 1 meter

Theme_Keyword: 1 meter contours

Theme_Keyword: one meter contours

Theme_Keyword: 1m contours

Theme_Keyword_Thesaurus: PrincipalInvestigators

Theme_Keyword: David C. Twichell

Theme_Keyword: Guy Gelfenbaum

Place:

Place_Keyword_Thesaurus: General

Place_Keyword: Gulf of Mexico

Place_Keyword: Florida

Place_Keyword: West Florida shelf

Place_Keyword: Sarasota

Place_Keyword: Big Sarasota Pass

Place_Keyword: Longboat Key

Place_Keyword: Buttonwood Harbor

Place_Keyword: New Pass

Place_Keyword: Lido Key

Access_Constraints: None

Use_Constraints:

The U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U. S. Geological Survey

Contact_Person: Dave Twichell

Contact_Position: Oceanographer

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Road

City: Woods Hole

State_or_Province: MA

Postal_Code: 02532

Country: USA

Contact_Voice_Telephone: (508) 548-8700 x2266

Contact_Facsimile_Telephone: (508) 457-2310

Contact_Electronic_Mail_Address: dtwichell@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name: htmldocs/images/covrgs/onemeter.gif

Browse_Graphic_File_Description: GIF

Browse_Graphic_File_Type: 1m bathymetry contours overlaid on sidescan sonar mosaic

Native_Data_Set_Environment: ESRI Shapefile format

Data_Quality_Information:

Logical_Consistency_Report: .

Completeness_Report: .

Lineage:

Process_Step:

Process_Description:

Depth measurements were collected along the ship's track and corrected for tide changes. Because the survey area was in a shallow area off shore of Sarasota, the depth ranges were approximately 3m to 12m. The depth values were recorded in decimeters (i.e a value of 85 equals 8.5m) to provide some additional accuracy and still keep the values within an 8-bit data range. The depth information was imported into PCI Remote Sensing software and a n 8-bit image was created. That data (image) was gridded to create a seafloor surface image and 1m contours were drawn through the image using the PCI Xpace program CONTOUR.

Process_Date: Unknown

Source_Produced_Citation_Abbreviation: 1m Sarasota bathymetry contours

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Dave Twichell

Contact_Organization: U.S. Geological Survey

Contact_Position: Oceanographer

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Road

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700 x2266

Contact_Facsimile_Telephone: (508) 457-2310

Contact_Electronic_Mail_Address: dtwichell@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: Complete chain

Point_and_Vector_Object_Count: 136

Spatial_Reference_Information:

Vertical_Coordinate_System_Definition:

Depth_System_Definition:

Depth_Datum_Name: Mean low water

Depth_Resolution: .25

Depth_Distance_Units: Meters

Depth_Encoding_Method: Attribute values

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: onemeter.dbf

Entity_Type_Definition: Shapefile Attribute Table

Entity_Type_Definition_Source: None

Attribute:

Attribute_Label: Depth

Attribute_Definition: Depth, in decimeters, of bathymetry contour interval.

Attribute_Definition_Source: User Defined

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 40

Range_Domain_Maximum: 120

Attribute:

Attribute_Label: Interval

Attribute_Definition:

a text string to identify the contour internval. Because depth values are in decimeters this field was added to allow labeling of contour lines with a proper label. For example, the interval value for contour line with a depth 60 is -6.0

Attribute_Definition_Source: User Defined

Attribute_Domain_Values:

Unrepresentable_Domain: Character field

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U. S. Geological Survey

Contact_Person: Dave Twichell

Contact_Position: Oceanographer

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Road

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543

Country: USA

Contact_Voice_Telephone: (508) 548-8700 x2266

Contact_Facsimile_Telephone: (508) 457-2310

Contact_Electronic_Mail_Address: dtwichell@usgs.gov

Resource_Description: one meter bathymetry contours of Sarasota, FL study rea

Distribution_Liability:

Although this derived data set has been used by the 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.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARCV

File_Decompression_Technique: No compression applied

Transfer_Size: 5,555Kb

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM

Recording_Capacity:

Recording_Density: 650

Recording_Density_Units: Mbytes

Recording_Format: ISO 9600

Compatibility_Information:

The user must have a CD-ROM capable of reading an ISO 9660 standard CD-ROM.

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARCE

Format_Specification: ARC/INFO export format (*.e00)

File_Decompression_Technique: No compression applied

Transfer_Size: 5,549Kb

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM

Recording_Capacity:

Recording_Density: 650

Recording_Density_Units: Mbytes

Recording_Format: ISO 9600

Compatibility_Information:

The user must have a CD-ROM capable of reading an ISO 9660 standard CD-ROM.

Digital_Form:

Digital_Transfer_Information:

Format_Name: ASCII

Format_Information_Content:

The ASCII file contains vector line segments. Line segments begin with a record containing LINE xx where xx is the assigned integer value of the depth contour. The depth contour value is assigned in decimeters. For example a value of 35 would be equivalent to 3.5m. The line information follows with coordinate pairs on a single line/record. Coordinates are recorded in signed decimal degrees and are in X,Y order (lon/lat).

File_Decompression_Technique: No compression applied

Transfer_Size: 11,084Kb

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM

Recording_Capacity:

Recording_Density: 650

Recording_Density_Units: Mbytes

Recording_Format: ISO 9600

Compatibility_Information:

The user must have a CD-ROM capable of reading an ISO 9660 standard CD-ROM.

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARCV

Format_Information_Content: All required ArcView shapefiles zipped as one file.

File_Decompression_Technique: zip

Transfer_Size: 2,964Kb

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM

Recording_Capacity:

Recording_Density: 650

Recording_Density_Units: Mbytes

Recording_Format: ISO 9600

Compatibility_Information:

The user must have a CD-ROM capable of reading an ISO 9660 standard CD-ROM.

Fees: None

Technical_Prerequisites:

Bathymetry contours are available in three 1- ArcView shapefile; 2 - ARC export; 3- ASCII text format. The user must have ESRI's ArcView or ARC program or another GIS application package capable of importing those data formats. The ASCII format can be read by any text editor.

Metadata_Reference_Information:

Metadata_Date: 19990603

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U. S. Geological Survey

Contact_Person: Valerie Paskevich

Contact_Position: Computer Specialist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543

Country: USA

Contact_Voice_Telephone: (508) 548-8700 x2281

Contact_Facsimile_Telephone: (508) 457-2310

Contact_Electronic_Mail_Address: vpaskevich@usgs.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: CSDGM version 2

Metadata_Time_Convention: Local time

Metadata_Access_Constraints: None

Metadata_Use_Constraints: None