gmx_nos80k: Medium Resolution Digital Vector U.S. Shoreline for the Gulf of Mexico area

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Frequently-anticipated questions:

What does this data set describe?
    Title:
    gmx_nos80k: Medium Resolution Digital Vector U.S. Shoreline for the Gulf of Mexico area
    Abstract:
    NOAA's Medium Resolution 1:70,000 scale Digital Vector Shoreline is a high-quality, Geographic Information System-ready, general-use digital vector data set containing the coastline of the contiguous United States of America. It was created by the Strategic Environmental Assessments (SEA) Division of NOAA's Office of Ocean Resources Conservation and Assessment. Compiled from hundreds of NOAA coast charts, this product comprises over 75,000 nautical miles of coastline (nearly 2.5 million vectices). The shoreline was created from data captured (digitized from scanned images of the master separates of the NOS Charts) from over 270 National Ocean Service Navigation Charts and spans some 80,000 nautical miles at an average map scale of 1:70,000. This product comprises over 75,000 nautical miles of coastline (nearly 2.5 million vectices), representing the entire conterminous United States of America. Alaska, the Hawaiian Islands, Puerto Rico, and all other interests and territories of the United States are not included in the collection. The data set is designed for a broad target audience ranging from governmental agencies, universities and other research institutions, to the private sector, and students, as well as any other concern requiring a general purpose digital shoreline layer for GIS and cartographic projects.
    Supplemental_Information:
    Generally, 1:80,000 NOAA coast charts took precedence and were used when available. For areas where 1:80,000 charts were not readily available, charts with the next closest higher scale (e.g., 1:60,0000) were used down to the highest scale available. Alternately, if higher scale charts were not available, charts of the closest lower scale (e.g., 1:100,000) were used down to the lowest scale. The digital shoreline for Florida was obtained from the state. This digital file was originally created from NOAA nautical charts and was not recreated by SEA. Generally, for these shoreline sections (EC80_06, GC80_05, and GC80_06), the highest scale charts available were used to digitize the shoreline. The resultant average mapping scale for the entire Medium Resolution Digital Vector Shoreline is approximately 1:70,000. See NOAA's Medium Resolution Digital Vector Shoreline website for more details on this product:

  1. How should this data set be cited?

    National Oceanic and Atmospheri, National Ocean Service (NOS), Office of , 1994, gmx_nos80k: Medium Resolution Digital Vector U.S. Shoreline for the Gulf of Mexico area: NOAA/NOS/ORCA/SEA, Silver Spring, MD.

    Online Links:

    This is part of the following larger work.

    Williams, S.J., Reid, J.M., Cross, V., and Polloni, C., 2003, Coastal Erosion and Wetland Change in Louisiana: Selected USGS Products: Digital Data Series DDS-79, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Field Center, Woods Hole, MA.

    Other_Citation_Details:
    Data is released via DVD-ROM media. 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: -97.744507
    East_Bounding_Coordinate: -80.169754
    North_Bounding_Coordinate: 30.885006
    South_Bounding_Coordinate: 24.501657

  3. What does it look like?

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

    Calendar_Date: 1994
    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):

      • String (1)

    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?

    gmx_nos80k

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    ID

    COUNT

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?

    Please credit the National Oceanic and Atmospheric Administration (NOAA), National Ocean Survey (NOS), Office of Coast Survey, and the Strategic Environmental Assessments (SEA) Division of the Ocean Resources Conservation and Assessment (ORCA as the originator of the dataset.

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

    Steve Rohman
    NOAA/NOS/SEA/ORCA
    NOAA
    Silver Spring, MD 20910
    USA

    (301) 713-3000 x137 (voice)
    (301) 713-4384 (FAX)
    srohman@seamail.nos.noaa.gov

Why was the data set created?
Because the ALLUS80K provides a higher detail of coastal inlets and waterways, this data layer was added to the GIS as a basemap for overlaying the land loss and shoreline change data archived in this report. This data layer is a subset of the complete ALLUS80k coastline and shapefile and has been clipped to the GIS project extent.

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

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

    (process 1 of 1)
    The complete ALLUS80K shapefile was clipped to the GIS project extent.

    Person who carried out this activity:

    VeeAnn Cross
    U.S. Geological Survey
    Woods Hole Field Center
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700x2251 (voice)
    (508) 457-2310 (FAX)
    vatnipp@usgs.gov

    Data sources used in this process:
    • allus80k.dbf
    • allus80k.shp
    • allus80k.shx

    Data sources produced in this process:

    • gmx_nos80k.dbf
    • gmx_nos80k.shp
    • gmx_nos80k.shx

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 observations, including topology?

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

Access_Constraints: None
Use_Constraints: Not for navigational purposes

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

    Steve Rohman
    NOAA, N/ORCA1
    NOAA
    Silver Spring, MD 20910
    USA

    (301) 713-3000 x137 (voice)
    (301) 713-4384 (FAX)
    rohmann@seamail.nos.noaa.gov

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

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

  4. How can I download or order the data?

Who wrote the metadata?
Dates:
Last modified: 25-Jun-2003

Metadata author:
U.S. Geological Survey
c/o Jamey M. Reid
IT Specialist (Data Management)
Woods Hole Field Center
Woods Hole, MA 025453-1598
USA

(508) 457-2204 (voice)
(508) 457-2310 (FAX)
jreid@usgs.gov

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

Metadata extensions used:

Generated by mp version 2.7.3 on Mon Jul 21 11:14:01 2003