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MJWATER: Major Water of the Long Island Sound GIS project area

Metadata also available as: OUTLINE | TEXT

Frequently-anticipated questions:

What does this data set describe?
    Title: MJWATER: Major Water of the Long Island Sound GIS project area
    Abstract:
    U.S. Major Water represents areas that are major water features within United States.
    Supplemental_Information:
    Major water of the United States (MJWATER) is an ESRI shapefile with polygon features. This is a subset of the original dataset. It has been clipped to the extent of the Long Island Sound GIS project area.

    Largest scale when displaying the data: 1:100,000.

  1. How should this data set be cited?

    Paskevich, Valerie, 2003, MJWATER: Major Water of the Long Island Sound GIS project area: U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details: Data are released via CD-ROM media.
    This is part of the following larger work.

    Poppe, L.J., Paskevich, V.F., Moser, M.S., DiGiacomo-Cohen, M.L., and Christman, E.B., 2004, Sidescan Sonar Imagery and Surficial Geologic Interpretation of the Sea Floor off Branford, Connecticut: Open-File Report 2004-1003, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details:
    This digital publication may also be available via the web at pubs.usgs.gov

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -80.519818
    East_Bounding_Coordinate: -67.122253
    North_Bounding_Coordinate: 47.233270
    South_Bounding_Coordinate: 38.952099

  3. What does it look like?

    mjwater (GIF)
    Overview showing the extent of the clipped MJWATER shapefile for the Long Island Sound GIS project area.

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

    Calendar_Date: Oct-1997
    Currentness_Reference: publication date

  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):

      • G-polygon (4170)

    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?

    mjwater
    The polygons represent major water features within United States such as lakes and large rivers. (Source: Geographic Data Technology, Inc. (GDT))

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    NAME
    The proper name of the water feature. (Source: Geographic Data Technology, Inc. (GDT))

    Names for the features.

    AREA
    The size of the shape in native units. (Source: User Defined)

    Range of values
    Minimum:0.00
    Maximum:0.121
    Resolution:.001

    PERIMETER
    The size of the shape in native units. (Source: User Defined)

    Range of values
    Minimum:0.00
    Maximum:16.758
    Resolution:.001

Who produced the data set?

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

  2. Who also contributed to the data set?

    GDT Dynamap.

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

    Environmental Systems Research Institute, Inc. (ESRI)
    c/o Data Team
    380 New York Street
    Redlands, California 92373-8100
    USA

    909-793-2853 (voice)
    909-793-5953 (FAX)
    info@esri.com

    Hours_of_Service: 8:00 a.m.-5:30 p.m. Pacific time, Monday-Friday
    Contact_Instructions:
    In the United States: Please direct all inquiries regarding software/data pricing and consulting services to your local ESRI Regional Office. For support, you may contact Technical Support by telephone (voice) between 6:00 a.m. and 6:00 p.m. Pacific time, Monday through Friday, by dialing 909-793-3774; facsimile (fax) available at 909-792-0960; electronic mail (e-mail) support@esri.com; or visit <http://support.esri.com>; ESRI holidays excluded.

    Outside the United States: Please direct all inquiries regarding software/data pricing, sales, support, and consulting services to your local ESRI International Distributor. This information can be found at <http://gis.esri.com/intldist/contactint.cfm>.

    For other questions or comments, you may contact ESRI headquarters by e-mail, telephone, or fax or write to us.

Why was the data set created?
U.S. Major Water provides thousands of named major water areas such as bays, canals, lakes, reservoirs, and large rivers. U.S. Major Water is detailed enough for geographic display at local, regional, and national levels.

How was the data set created?
  1. From what previous works were the data drawn?

    GDT Dynamap/2000 v7.3 (source 1 of 3)
    Geographic Data Technology, Inc., 199710, Dynamap/2000 v7.3: Dynamap/2000® v7.3, Geographic Data Technology, Inc, Lebanon, New Hampshire, USA.

    Type_of_Source_Media: CD-ROM
    Source_Scale_Denominator: 100000
    Source_Contribution: Attribute and geospatial data

    GDT Dynamap/2000 v9.0 (source 2 of 3)
    Geographic Data Technology, Inc., 199901, Dynamap/2000 v9.0: Dynamap/2000® v9.0, Geographic Data Technology, Inc, Lebanon, New Hampshire, USA.

    Type_of_Source_Media: CD-ROM
    Source_Scale_Denominator: 100000
    Source_Contribution: Attribute and geospatial data

    GDT Dynamap/2000 v10.0 (source 3 of 3)
    Geographic Data Technology, Inc., 200001, Dynamap/2000 v10.0: Dynamap/2000® v10.0, Geographic Data Technology, Inc., Lebanon, New Hampshire, USA.

    Type_of_Source_Media: CD-ROM
    Source_Scale_Denominator: 100000
    Source_Contribution: Attribute and geospatial data

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

    Date: Jan-2000 (process 1 of 3)
    This data set is a TIGER-derived product, which by definition "line only" based files. In many cases these line segments followed the actual shape only roughly. To remedy this, a process was developed to identify irregular features and give them more accurate shapes. Although lines are reasonable for streets, they often do not represent areas such as water very well. A river, for example, is represented by two lines that correspond to the two shorelines. In order for a GIS user to represent this river in a way that makes sense on a map, it is necessary to manually join the lines into a polygon that can be filled with an appropriate color. GDT applied both algorithmic and manual processes to create separate polygonal layers for water areas.

    Data sources produced in this process:

    • GDT Dynamap/2000 v7.3
    • GDT Dynamap/2000 v9.0
    • GDT Dynamap/2000 v10.0

    Date: 30-Jun-2000 (process 2 of 3)
    The following steps were performed by ESRI: Extracted data set from GDT Dynamap/2000 v7.3. Added all updates and changes manually from Dynamap/2000 v9.0. Converted to North American Datum of 1983 (NAD83). Generalized to a tolerance of 0.005 miles (27 feet). Corrected an error on the Potomac River using Dynamap/2000 v10.0 as source. Created ArcGIS? layer file (.lyr). Created ArcView legend file (.avl). Created projection file (.prj). Ran ArcView Avenue request ExportClean, and created spatial indices.

    Data sources used in this process:

    • GDT Dynamap/2000 v7.3
    • GDT Dynamap/2000 v9.0
    • GDT Dynamap/2000 v10.0

    Date: 19-Apr-2002 (process 3 of 3)
    The original shapefile was clipped to to the extent of the Long Island Sound GIS project area.

    Person who carried out this activity:

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

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

    Data sources used in this process:
    • mjwater.dbf
    • mjwater.shp
    • mjwater.shx

    Data sources produced in this process:

    • mjwater.dbf
    • mjwater.shp
    • mjwater.shx

  3. What similar or related data should the user be aware of?

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?

    The geospatial part of this data set was extracted from the 1990 Census Version TIGER/Line - files (CD-ROM edition). To improve the shape accuracy, GDT ran a process to identify irregular features and give them more accurate shapes. It was then generalized to a tolerance of 27 feet. Due to the processing, the positional accuracy in unknown but close to the original TIGER/line files of +/- 167 feet approximately.

    The positional accuracy of the TIGER/Line coordinates varies with the source materials used but at best meets the established National Map Accuracy standards (+/- 167 feet approximately) where 1:100,000-scale maps from the USGS are the source. The Census Bureau cannot specify the accuracy of feature updates added by its field staff or of features derived from the GBF/DIME-Files or other map sources. Thus, the level of positional accuracy in the TIGER/Line files is not suitable for high-precision measurement applications such as engineering problems, property transfers, or other uses that might require highly accurate measurements of the earth's surface.

  3. How accurate are the heights or depths?

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

    After processing, the data set is checked for drawing display and number of records and file sizes compared with source materials.

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

    No duplicate features are present. The shapefile is exported using Avenue request ExportClean. This request verifies and enforces the correctness of shapes.

How can someone get a copy of the data set?
Are there legal restrictions on access or use of the data?

Access_Constraints: Access granted to Licensee only.
Use_Constraints:
The data are provided by multiple, third party data vendors under license to ESRI for inclusion on ESRI Data & Maps CD-ROMs for use with ESRI® software. Each data vendor has its own data licensing policies and may grant varying redistribution rights to end users. Please consult the redistribution rights below for this data set provided on ESRI Data & Maps CD-ROMs. As used herein, "Geodata" shall mean any digital data set consisting of geographic data coordinates and associated attributes.

The redistribution rights for this data set: Redistribution rights are granted by the data vendor for hard-copy renditions or static, electronic map images (e.g. .gif, .jpeg, etc.) that are plotted, printed, or publicly displayed with proper metadata and source/copyright attribution to the respective data vendor(s). Geodata is redistributable with a Value-Added Software Application developed by ESRI Business Partners on a royalty-free basis with proper metadata and source/copyright attribution to the respective data vendor(s).

  1. Who distributes the data set? (Distributor 1 of 2)

    Environmental Systems Research Institute, Inc. (ESRI); ESRI International Distributors
    380 New York Street
    Redlands, California 92373-8100
    USA

    800-447-9778 (voice)

    Contact_Instructions:
    In the United States, contact the ESRI Telesales staff at 800-447-9778 for more information about our software and data.

    Outside the United States, please direct all inquiries to your local ESRI International Distributor. This information can be found at <http://gis.esri.com/intldist/contactint.cfm>.

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

    Offline Data

  3. What legal disclaimers am I supposed to read?

    See use constraints.

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    To use this data requires software that supports ArcView® GIS shapefiles.

  1. Who distributes the data set? (Distributor 2 of 2)

    U. S. Geological Survey
    c/o Valerie Paskevich
    Information 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

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

    Downloadable Data: mjwater.shp - water bodies for the Long Island Sound GIS project area.

  3. What legal disclaimers am I supposed to read?

    Although this derived data set and it's 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?

  5. What hardware or software do I need in order to use the data set?

    The data are available in the ESRI shapefile format. The user must have Environmental Systems Research Institute's (ESRI) ArcView 3.0 or greater or ArcGIS software to read and process the data file. In lieu of Arcview, the user may utilize another GIS application package capable of importing the data. A free GIS data viewer, ArcExplorer, is available from the ESRI website at www.esri.com/software/arcexplorer/download4.html

Who wrote the metadata?
Dates:
Last modified: 18-Feb-2004

Metadata author:
U.S. Geological Survey
c/o Valerie Paskevich
Information 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)

Generated by mp version 2.7.33 on Wed Feb 18 16:54:26 2004