half meter bathymetry contours offshore Sarasota, FL


Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Dave Twichell(comp.)
Publication_Date: 19990601
Title: half 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 half meter bathymetry contours for the Sarasota study area.
Supplemental_Information:
Isobath contours range from 3.5 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: -82.5686
North_Bounding_Coordinate: 27.3855
South_Bounding_Coordinate: 27.2178
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: half meter
Theme_Keyword: .5m
Theme_Keyword: .5 meter
Theme_Keyword: half meter contours
Theme_Keyword: .5 meter contours
Theme_Keyword: .5m 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/halfm.gif
Browse_Graphic_File_Description: GIF
Browse_Graphic_File_Type: .5m 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 .5m contours were drawn through the image using the PCI Xpace program CONTOUR.
Process_Date: Unknown
Source_Produced_Citation_Abbreviation: .5m 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: 274

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: halfm.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: 35
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 65 is -6.5
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: half meter bathymetry contour lines of Sarasota, FL study area
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: ARCE
File_Decompression_Technique: No compression applied
Transfer_Size: 11,137Kb
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: 20,142Kb
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: 22,223Kb
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: 5,943Kb
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 formats 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

Generated by mp on Fri Jun 4 08:29:36 1999