Title: interpretation of the sidescan sonar mosaic from the study
area off new London, CT
Publication_Information:
Publication_Place: Woods Hole Field Center, Woods Hole, MA
Publisher: U.S. Geological Survey
Larger_Work_Citation:
Citation_Information:
Originator: Valerie Paskevich(ed.)
Originator: Larry Poppe(ed.)
Publication_Date: 20000000
Title:
Georeferenced sea-floor mapping and bottom photography in Long Island Sound
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 00-304
Publication_Information:
Publication_Place: Woods Hole Field Center, Woods Hole, MA
Publisher: U.S. Geological Survey
Description:
Abstract:
This data layer is an interpretation of the sidescan sonar mosaic from
the study area off New London, CT.
Purpose:
This data layer, which focuses on benthic communities, was developed as
part of a cooperative project between the University of New Haven, the
Connecticut DEP, and the U.S. Geological Survey. Benthic communities are
an integral component of the ecology of LIS.
Understanding the role that spatial heterogeneity plays in the dynamic
of benthic landscapes may be a key to developing a better understanding
of the estuarine ecology and the impacts of huuman activity. The purpose
of providing this data layer is to help establish a regional framework
for developing a more extensive GIS for benthic communities in LIS that
can be used for education, research, and environmental management.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19920000
Ending_Date: 20000000
Currentness_Reference: Publication Date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -72.1383
East_Bounding_Coordinate: -72.0307
North_Bounding_Coordinate: 41.3143
South_Bounding_Coordinate: 41.2512
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: U. S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Team
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: Woods Hole Field Center
Theme_Keyword: Connecticut Department of Environmental Protection
Theme_Keyword: University of New Haven
Theme_Keyword: ArcView
Theme_Keyword: arcview
Theme_Keyword: shapefile
Theme_Keyword: polygon
Theme_Keyword: Zajac
Theme_Keyword: benthic habitats
Theme_Keyword: biology
Theme_Keyword: community structure
Theme_Keyword: infauna
Theme_Keyword: sidescan sonar
Theme_Keyword: ecologic mapping
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: Long Island Sound
Place_Keyword: estuary
Place_Keyword: Connecticut
Place_Keyword: New London
Access_Constraints:
The University of New Haven and the U.S. Geological Survey must be referenced
as the originator of the data set in any future products or as research
derived from these data.
Although this derived data set and its lineage dataset have been used by
the University of New Haven and the USGS, no warranty, expressed or implied,
is made by the University of New Haven or 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 University of
New Haven or the USGS in the use of the data or related materials.
Vertical_Positional_Accuracy_Explanation: Tidal range is less than
2 m
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: R.N. Zajac(comp.)
Publication_Date: 19960000
Title:
Ecologic mapping and management-based analyses of benthic habitats and
communities in Long Island Sound
Publication_Information:
Publication_Place: Hartford, CT
Publisher: Connecticut DEP
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19920000
Ending_Date: 19960000
Source_Currentness_Reference: Publication Date
Source_Citation_Abbreviation: Zajac, 1996
Source_Contribution:
Describes mapping and identification of benthic communities in eastern
Long Island Sound
Process_Step:
Process_Description:
Mapping was performed on a sidescan sonar survey. This survey was processed
at 3,479-scale utilizing the U.S.G.S. Mini Image Processing system (MIPS)
in an Equatorial Mercator Projection. Processing included bottom, ratio,
and radiometric corrections; sectioning the survey area; "Geoming" individual
map sections; "stenciling" and "mosaicing"; and building the final image.
The shading convention for this mosaic is that dark tones are interpreted
as fine sediment (fine sand, silt and clay); and light tones are interpreted
as coarse sediment. Rough and "grainy" patches are interpreted as glacial
drift or bedrock outcrops.The image files contained here have been modified,
using Arc/Info software, from the three original TIFFs delivered by University
of Rhode Island. The images were converted to grids, geo-referenced, and
individually reclassified in a manner similar to linear stretching to account
for variations in gray scales among the three sections of the mosaic. The
grids were then converted back to TIFF format with world files in Latitude/Longitude
decimal degrees (no projection). Pixel size is approximately 0.8 meters.
Source_Used_Citation_Abbreviation: Lewis and others 1998
The outline of the mosaic was digitized in ArcInfo and the resultant data
were converted into a shape file. The interpretation (polygons) was drawn
manually on paper from sediment point data. These polygons were digitized
in ArcInfo and the resultant data were converted into a shape file.
Carried over from the ArcInfo attribute MOSAIC#. MOSAIC# is an ArcInfo
internal control parameter and has no applicable relevance to the use of
the data.
Attribute_Definition_Source: software computed
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2
Range_Domain_Maximum: 57
Attribute_Units_of_Measure: unknown
Attribute:
Attribute_Label: Mosaic_id
Attribute_Definition:
Carried over from the ArcInfo attribute MOSAIC-ID. MOSAIC-ID is an ArcInfo
internal control parameter and has no applicable relevance to the use of
the data.
Attribute_Definition_Source: software computed
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2
Range_Domain_Maximum: 57
Attribute:
Attribute_Label: Newcode
Attribute_Definition: A numeric coding system used to describe the
Sed_type
Attribute_Definition_Source: User defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 5
Attribute:
Attribute_Label: Sed_type
Attribute_Definition: Gross lithologic description of the surficial
sediments.
Attribute_Definition_Source: User defined
Attribute_Domain_Values:
Unrepresentable_Domain: Character field
Attribute:
Attribute_Label: Size
Attribute_Definition:
This attribute (Size) gives the areas of polygons in square meters. Same
as area, but rounded to whole meters.
Attribute_Definition_Source: Zajac, 1996
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2
Range_Domain_Maximum: 92567160
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: Bndlngth
Attribute_Definition:
Length of the contact between the polygon and the surrounding polygons.
Same as perimeter, but rounded to the whole meters.
Attribute_Definition_Source: User defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 7
Range_Domain_Maximum: 80338
Attribute_Units_of_Measure: meters
Overview_Description:
Entity_and_Attribute_Overview:
The original studies were conducted to describe the benthic communities
in LIS; the corresponding data layer is presented to show the extent of
the sidescan sonar mosaic off New London, in eastern Long Island Sound,
and the distribution of habitats on the mosaic.
Resource_Description: Long Island Sound: nlmosint.shp
Distribution_Liability:
Although this derived data set and its lineage dataset have been used by
University of New Haven and the USGS, no warranty, expressed or implied, is made by UNH or 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
Format_Information_Content:
nlmosint.dbf
nlmosint.shp
nlmosint.shx
nlmosint.avl
nlmosint.sbn
nlmosint.sbx
File_Decompression_Technique: No compression applied
Transfer_Size: 96Kbytes
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 system with a CD-ROM capable of reading an ISO-9660
standard CD-ROM disk. To browse the information contained on this disk,
the user must also have a current version of a WWW browser available. The
user must also have the software installed on their computer system capable
to unzip the archived file.
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARCV
Format_Information_Content:
The six ArcView files (nlmosint.dbf, nlmosint.shp, nlmosint.shx, nlmosint.avl,
nlmosint.sbn, nlmosint.sbx) comprising a GIS layer showing the interpretation
of the sidescan sonar mosaic from the study area off new London, CT.
File_Decompression_Technique: zip
Transfer_Size: 51Kbytes
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 system with a CD-ROM capable of reading an ISO-9660
standard CD-ROM disk. To browse the information contained on this disk,
the user must also have a current version of a WWW browser available. The
user must also have the software installed on their computer system capable
to unzip the archived file.
Fees: none
Custom_Order_Process: None
Technical_Prerequisites:
This layer is available in ArcView 3.2 format. Users must have ArcView
3.0 or later, or another GIS application capable of importing the data.
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20001101
Metadata_Reference_Information:
Metadata_Date: 20000812
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Larry Poppe
Contact_Organization: U. S. Geological Survey
Contact_Position: geologist
Contact_Address:
Address_Type: mailing 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 x2314
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: lpoppe@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_Access_Constraints: None
Metadata_Use_Constraints: None
Generated by mp
version 2.5.3 on Sat Aug 12 15:59:40 2000
