bathy_500m - 500m Bathy Contours Derived from ETOPO2 Global 2' Elevations

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Frequently-anticipated questions:

What does this data set describe?

Title:
bathy_500m - 500m Bathy Contours Derived from ETOPO2 Global 2' Elevations
Abstract:
This bathymetry contour data is in ESRI shapefile format and was derived from a National Oceanic Atmospheric Administration (NOAA), National Geophysical Data Center (NGDC) ETOPO2 data set. An ESRI ArcView extension, Spatial Analyst, was used to create 500m intervals from a database of grid files (2-minute latitude - longitude resolution).
  1. How should this data set be cited?

    U.S. Geological Survey, 2004, bathy_500m - 500m Bathy Contours Derived from ETOPO2 Global 2' Elevations: Open-File Report 2005-1066, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Brink, Uri ten , Smith, Lt. Shep , Worley, Chuck, Stepka, Thomas, and Williams, Glynn, 2005, Project PROBE Leg I - Report and Archive of Multibeam Bathymetry and Acoustic Backscatter, CTD/XBT and GPS Navigation Data Collected During USGS Cruise 02051 (NOAA Cruise RB0208) Puerto Rico Trench September 24, 2002 to September 30, 2002.: Open-File Report 2005-1066, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -78.988024
    East_Bounding_Coordinate: -54.880239
    North_Bounding_Coordinate: 23.982036
    South_Bounding_Coordinate: 9.934132

  3. What does it look like?

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

    Calendar_Date: 2001
    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 (1440)

    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 D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257224.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Depth_System_Definition:

  7. How does the data set describe geographic features?

    bathy_500m
    Shapefile Attribute Table (Source: None)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    ID
    Unique sequential number assigned to identify feature (Source: ESRI)

    Coordinates defining the features.

    CONTOUR
    Depth values (elevation) recorded as meter values. Depths are recorded as negative values. (Source: Chris Polloni)

    Range of values
    Minimum:-8500
    Maximum:-0
    Units:meters
    Resolution:10

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?

    National Oceanic and Atmospheric Administration (NOAA), National Geophysical Data Center (NGDC) for creating the ETOPO2 dataset from which the contours were derived.

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

    Chris Polloni
    U.S. Geological Survey
    Information Specialist
    384 Woods Hole Road
    Woods Hole, Massachusetts 02543-1598
    USA

    508.548.8700 (voice)
    508.457.2310 (FAX)
    cpolloni@usgs.gov

    Hours_of_Service: 8:00AM to 5:00PM: M-F

Why was the data set created?

To supplements the main featured mosaic images of the Puerto Rico trench survey with a Caribbean Sea below ocean surface relief model.

How was the data set created?

  1. From what previous works were the data drawn?

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

    Date: 2003 (process 1 of 4)
    The desired data was extracted from the ETOPO2 CDROM in the ESRI ASCII format in 45-degree blocks using GEODAS grid translator version 4.1.16.

    Person who carried out this activity:

    VeeAnn A. Cross
    U.S. Geological Survey
    Marine Geologist
    384 Woods Hole Rd.
    Woods Hole, MA 02543-1598

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

    Hours_of_Service: 8AM to 5PM; M-F
    Date: 2003 (process 2 of 4)
    The ASCII grids were then converted to ESRI grid files and assigned Geographic, NAD83 projection information using Arc/Info version 8.2.

    Person who carried out this activity:

    VeeAnn A. Cross
    U.S. Geological Survey
    Marine Geologist
    384 Woods Hole Rd.
    Woods Hole, MA 02543-1598

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

    Date: 2004 (process 3 of 4)
    Bathymetric lines were derived from the temporary grid data set. Contours were created representing below surface isolines. ArcView "Query Builder" formula tool was used to isolate and derive 500m contour bathymetry intervals.

    Person who carried out this activity:

    Chris Polloni
    U.S. Geological Survey
    Information Specialist
    384 Woods Hole Road
    Woods Hole, Massachusetts 02543-1598
    USA

    (508)548.8700 x2280 (voice)
    (508) 457.2310 (FAX)
    cpolloni@usgs.gov

    Hours_of_Service: 8AM to 5PM; M-F
    Date: 2004 (process 4 of 4)
    This shapefile's coordinate system was re-assigned to Geographic, Geodetic Model: WGS84

    Person who carried out this activity:

    Glynn Williams
    U.S. Geological Survey
    Information Technician (Geo/GIS)
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2290 (voice)
    (508) 457.2310 (FAX)
    gwilliams@usgs.gov

    Hours_of_Service: 8:00AM to 4:30PM; M - F
  3. What similar or related data should the user be aware of?

    Brink, Uri ten , Danforth, William, Polloni, Chris, Parker, Castle Eugene , Uozumi, Toshi, and Williams, Glynn, 2004, Project PROBE Leg II - Final Report and Archive of Swath Bathymetric Sonar, CTD/XBT and GPS Navigation Data Collected During USGS Cruise 03008 (NOAA Cruise RB0303) Puerto Rico Trench 18 February - 7 March, 2003: Open-file Report 2004-1400, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, Massachusetts.

    Online Links:

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:
Public Domain data from the U.S. government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.

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

    Uri ten Brink
    U.S. Geological Survey
    Research Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    508.548.8700 (voice)
    508.457.2310 (FAX)
    utenbrink@usgs.gov

    Hours_of_Service: 8AM to 5PM; M-F
  2. What's the catalog number I need to order this data set?

    Downloable Data: Open-File Report 2005-1066

  3. What legal disclaimers am I supposed to read?

    Although these data sets are used by the National Oceanic and Atmospheric Administration (NOAA) and the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by NOAA 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 NOAA or the USGS in the use of these data.

  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 is available in Environmental Systems Research Institute, Inc. (ESRI) shapefile format. The user must have ArcView 3.+ or ArcGIS 8.+ to read and process the data file. In lieu of ArcView/ArcGIS, the user may utilize another GIS application package capable of importing data.

Who wrote the metadata?

Dates:
Last modified: 26-Oct-2004
Metadata author:
Glynn Williams
U.S. Geological Survey
Information Technician (Geo/GIS)
384 Woods Hole Road
Woods Hole, Massachusetts 02543-1598
USA

(508) 548-8700 x2290 (voice)
(508) 457-2310 (FAX)
gwilliams@usgs.gov

Hours_of_Service: 8:00AM to 5:00PM; M-F
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.8.6 on Thu Sep 01 10:53:26 2005