U.S. Geological Survey Open-File Report 02-002

LIS1992: 5 m Bathymetric Contours for Long Island Sound

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

Title: LIS1992: 5 m Bathymetric Contours for Long Island Sound

Abstract:

This bathymetric contour data set was derived from a gridded data set obtained from URI (B.Tyce, G. Hatcher). They used the "Gridder" program to obtain the grid. This gridded data set was generated from the original NOS soundings from 9 track tape that was cleaned up and edited at URI. This work was done with the intention of producing the color poster called "Long Island Sound Estuary" (Connecticut Dept. of Environmental Protection"), 1993. The accuracy is questionable.

1. How should this data set be cited?

   Schmuck, Eric, Unknown, LIS1992: 5 m Bathymetric Contours for Long Island Sound:.

   Online Links:

   • <http://woodshole.er.usgs.gov/openfile/of02-002/data/bathy/>

   This is part of the following larger work.

   Poppe, Larry, and Paskevich, Valerie, 2002, Geologic Framework Data from Long Island Sound, 1981-1990: A Digital Data Release: U.S. Geological Survey Open-File Report 02-002, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole, MA.

   Online Links:

   • <http://woodshole.er.usgs.gov/openfile/of02-002>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -74.998530

   East_Bounding_Coordinate: -71.000107

   North_Bounding_Coordinate: 41.995619

   South_Bounding_Coordinate: 40.000462

3. What does it look like?

   ../../../htmldocs/images/browse/lis1992.gif (GIF)

   Image showing extent of coverage for Long Island Sound 5 meter bathymetry contour data layer lis1992.

4. Does the data set describe conditions during a particular time period?

   Calendar_Date: unknown

   Currentness_Reference: ground condition

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: vector digital data

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • String (2955)

   2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000000. Longitudes are given to the nearest 0.000000. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.
      

7. How does the data set describe geographic features?

   lis1992.dbf

   shapefile attribute table (Source: ESRI)

   FID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: ESRI)

   Value	Definition
   PolyLine

   Coordinates defining the features.

   LENGTH

   Length of vector segment in native units. (Source: User Defined)

   Range of values
   Minimum:	0
   Maximum:	137.83
   Resolution:	.001

   CONTOUR

   Depth value, in meters, of vector contour. Value recorded as negative. (Source: User Defined)

   Range of values
   Minimum:	-345
   Maximum:	-5
   Units:	meters
   Resolution:	1

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Eric Schmuck

2. Who also contributed to the data set?

3. To whom should users address questions about the data?

   U. S. Geological Survey, Coastal and Marine Geology Program
   c/o Valerie Paskevich
   Computer Specialist, GIS Coordinator
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   508-548-8700 x2281 (voice)
   508-457-2310 (FAX)
   vpaskevich@usgs.gov
   

These data can be used with geographic information systems (GIS) software to display geologic and oceanographic information for the U. S. Atlantic northeast. The data are to be used for illustrations and illustrative maps on scientific topics. They are intended for science researchers, students, policy makers, and the general public. There is NO ASSURANCE of their accuracy, completeness, or precision.

1. From what previous works were the data drawn?

2. How were the data generated, processed, and modified?

1. How well have the observations been checked?

2. How accurate are the geographic locations?

3. How accurate are the heights or depths?

4. Where are the gaps in the data? What is missing?

5. How consistent are the relationships among the observations, including topology?

   No additional checks for topological consistency were performed on this data set.

Are there legal restrictions on access or use of the data?

Access_Constraints: None

Use_Constraints:

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 agency 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.

This information is NOT intended for navigational or legal purposes.

Any use of trade, firm or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

1. Who distributes the data set? (Distributor 1 of 1)

   Valerie Paskevich
   U.S. Geological Survey
   Computer Specialist
   384 Woods Hole Road
   Woods Hole, MA 02543-1598
   USA
   

   (508) 548-8700 x2281 (voice)
   (508) 457-2310 (FAX)
   vpaskevich@usgs.gov
   

2. What's the catalog number I need to order this data set?

   Long Island Sound: lis1992.shp

3. What legal disclaimers am I supposed to read?

   Although this derived data set and its lineage dataset have 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.

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	The seven ArcView shapefiles (lis1992.dbf, lis1992.shp, lis1992.shx, lis1992.sbn, lis1992.sbx, lis1992.avl, lis1992.prj) comprising the 1 meter bathymetric contours for Long Island Sound and an ASCII version of the metadata. in format ArcView shapefile (version 3.2) Size: 1.53 Kbytes
     Network links:	<http://woodshole.er.usgs.gov/openfile/of02-002/data/bathy/lis1992.zip>
     Media you can order:	DVD (Density 4.75 Gbytes) Note: The user must have a system with a DVD drive capable of reading an UDF standard DVD-R disk. To browse the information contained on this disk, the user must also have a current version of WWW browser available. The user must also have the software installed on their computer system capable to unzip the archived file.

   • Cost to order the data: none

Dates:

Last modified: 05-Apr-2002

Metadata author:

Valerie Paskevich
U.S. Geological Survey, Coastal and Marine Geology Program
Computer Specialist, GIS Coordinator
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

508-548-8700 x2281 (voice)
508-457-2310 (FAX)
vpaskevich@usgs.gov

Metadata standard:

FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)