G1CDP_NAV_KC_GEO.SHP - Shotpoint navigation for Keathley Canyon Multichannel Seismics Survey Collected During USGS Cruise G1-03-GM (03001)

Metadata also available as - [Outline] - [Parseable text]

Frequently-anticipated questions:


What does this data set describe?

Title:
G1CDP_NAV_KC_GEO.SHP - Shotpoint navigation for Keathley Canyon Multichannel Seismics Survey Collected During USGS Cruise G1-03-GM (03001)
Abstract:
The point shapefile contains the shotpoint navigation for the Keathley Canyon multichannel seismic survey collected during USGS cruise G1-03-GM aboard the R/V Gyre in the Gulf of Mexico in May, 2003. The purpose of this cruise was to collect multichannel seismic data in support of USGS and Department of Energy gas hydrate studies. About 786 km of data were collected along 59 lines in and around lease block Keathley Canyon 195.
  1. How should this data set be cited?

    Cross, VeeAnn, Hutchinson, Deborah, Hart, Pat, Sliter, Ray, Ackerman, Seth, and Dugan, Brandon, 2005, G1CDP_NAV_KC_GEO.SHP - Shotpoint navigation for Keathley Canyon Multichannel Seismics Survey Collected During USGS Cruise G1-03-GM (03001): Open-File Report 2005-1071, 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.

    Twichell, D.C., Cross, V.A., Paskevich, V.F., Hutchinson, D.R., Winters, W.J., and Hart, P.E., 2005, GIS of selected geophysical and core data in the northern Gulf of Mexico continental slope collected by the U.S. Geological Survey: Open-File Report 2005-1071, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -93.139346
    East_Bounding_Coordinate: -92.581313
    North_Bounding_Coordinate: 27.588756
    South_Bounding_Coordinate: 26.724186

  3. What does it look like?

    <http://pubs.usgs.gov/of/2005/1071/data/seismic/2003/keathley/nav/g1cdp_nav_kc_geo.gif> (GIF)
    Overview image showing the extent and coverage of the data layer.
    <http://pubs.usgs.gov/of/2005/1071/data/seismic/2003/keathley/nav/g1cdp_nav_kc_geo-thumb.gif> (GIF)
    Thumbnail image showing the extent and coverage of the data layer.

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

    Beginning_Date: 03-May-2003
    Ending_Date: 16-May-2003
    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):

      • Entity point (155428)

    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?

    g1cdp_nav_kc_geo
    Shapefile Attribute Table (Source: ESRI)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    CDP
    Common depth point number (Source: USGS)

    Range of values
    Minimum:2
    Maximum:17445
    Units:integer
    Resolution:1

    SHOT
    Shot number (Source: USGS)

    Range of values
    Minimum:1
    Maximum:2829
    Units:integer
    Resolution:1

    X_UTM
    Location of CDP in UTM (easting) (Source: USGS)

    Range of values
    Minimum:486151
    Maximum:541346
    Units:meters
    Resolution:1

    Y_UTM
    CDP location (UTM northing) (Source: USGS)

    Range of values
    Minimum:2955887
    Maximum:3051713
    Units:meters
    Resolution:1

    LINE
    Line identifier (Source: USGS)

    Character string identfying the survey line.

    X_COORD
    CDP location (longitude) (Source: USGS)

    Range of values
    Minimum:-93.13935
    Maximum:-92.58131
    Units:decimal degrees
    Resolution:.00001

    Y_COORD
    CDP location (latitude) (Source: USGS)

    Range of values
    Minimum:26.72419
    Maximum:27.58876
    Units:decimal degrees
    Resolution:.00001


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?

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

    Deborah Hutchinson
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2263 (voice)
    (508) 457-2310 (FAX)
    dhutchinson@usgs.gov


Why was the data set created?

This GIS overlay is a component of the U.S. Geological Survey, Woods Hole Science Center's, Gulf of Mexico GIS database. The Gulf of Mexico GIS database is intended to organize and display USGS held data and provide on-line (WWW) access to the data and/or metadata.


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: 07-May-2003 (process 1 of 8)
    Navigation file exported from seg-y headers in ProMAX and saved to Marfac Snap2. NOTE: Navigation reflects the location of the GPS antenna. Shift to the actual shot location will be applied later.

    Person who carried out this activity:

    Ray Sliter
    U.S. Geological Survey
    345 Middlefield Road
    Menlo Park, CA 94025
    USA

    650-329-5194 (voice)
    (650) 329-5190 (FAX)
    rsliter@usgs.gov

    Data sources produced in this process:
    • ProMAX created .nav file

    Date: 07-May-2003 (process 2 of 8)
    Navigation file opened in MS Excel, arc milliseconds for X and Y coordinates were converted to decimal degrees (by dividing each of the arc-millisecond values by 3,600,000 and creating the two new attribute fields X_DD and Y_DD) [excel file ##to##sda.xls]. A header line was added to the table in Excel.

    Person who carried out this activity:

    Seth Ackerman
    U.S. Geological Survey
    GIS Technician
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x 2315 (voice)
    (508) 457-2310 (FAX)
    sackerman@usgs.gov

    Data sources used in this process:
    • ProMAX created .nav file

    Data sources produced in this process:

    • ##to##_2gis.txt

    Date: 07-May-2003 (process 3 of 8)
    Imported the text file of X/Y coordinates (Decimal Degrees) into ArcMap 8.2. Set projection to Geographic - NAD83 and exported as a point shapefile (##to##_geo.shp)

    Person who carried out this activity:

    Seth Ackerman
    U.S. Geological Survey
    GIS Technician
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x 2315 (voice)
    (508) 457-2310 (FAX)
    sackerman@usgs.gov

    Data sources used in this process:
    • ##to##_2gis.txt

    Data sources produced in this process:

    • ##to##_geo.shp

    Date: 07-May-2003 (process 4 of 8)
    In ArcToolbox 8.2 reprojected the point theme (##to##_geo.shp) to the appropriate UTM zone (zone 15 for Keathley Canyon or zone 16 for Atwater Valley)

    Person who carried out this activity:

    Seth Ackerman
    U.S. Geological Survey
    GIS Technician
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2315 (voice)
    (508) 457-2310 (FAX)
    sackerman@usgs.gov

    Data sources used in this process:
    • ##to##_geo.shp

    Data sources produced in this process:

    • ##to##_utm##.shp - where for utm##, the ## is the utm zone (zone 15 for Keathley Canyon or zone 16 for Atwater Valley regions)

    Date: 07-May-2003 (process 5 of 8)
    XY values were added to the UTM projected shapefile creating 2 new attribute fields (X_COORD and Y_COORD) with the utm coordinates for the points.

    Person who carried out this activity:

    Seth Ackerman
    U.S. Geological Survey
    GIS Technician
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2315 (voice)
    (508) 457-2310 (FAX)
    sackerman@usgs.gov

    Data sources used in this process:
    • ##to##_utm##.shp

    Data sources produced in this process:

    • ##to##_utm##.shp with utm coordinates added to the attribute table

    Date: 07-May-2003 (process 6 of 8)
    Navigation exported as ASCII text file. Matlab process to shift the navigation fixes to reflect that of the actual shot location (currently nav reflects the location of the GPS antenna). Outfile header will be:

    yr jd time GPS_x_utm GPS_y_utm Line shot ffid sht_x_utm sht_y_utm

    Person who carried out this activity:

    Brandon Dugan, Seth Ackerman
    U.S. Geological Survey
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2218 (voice)
    (508) 457-2310 (FAX)
    bdugan@usgs.gov

    Data sources used in this process:
    • ##to##_utm##.shp with utm coordinates added to the attribute table

    Data sources produced in this process:

    • KC##new.txt or AV##new.txt

    Date: 07-May-2003 (process 7 of 8)
    Navigation (corrected with a shift to reflect the shot location) taken back into ProMAX. Then file of CDP locations (g1cdp.nav) exported from ProMAX. File split into kc_cdp.nav and av_cdp.nav, then awk script to reformat the output. CDP points into ArcView 3.3 and saved as shapefiles g1cdp_nav_kc_geo.shp and g1cdp_nav_av_geo.shp.

    Person who carried out this activity:

    Seth Ackerman
    U.S. Geological Survey
    GIS Technician
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x 2315 (voice)
    (508) 457-2310 (FAX)
    sackerman@usgs.gov

    Data sources used in this process:
    • g1cdp.nav (kc_cdp.nav)

    Data sources produced in this process:

    • g1cdp_nav_kc_utm15.shp

    Date: 07-May-2003 (process 8 of 8)
    In ArcToolbox 8.2, reprojected the UTM point shapefiles to geographic NAD83 projection and added the geographic coordinates in ArcMap using the Xtools extension.

    Person who carried out this activity:

    Seth Ackerman
    U.S. Geological Survey
    GIS Technician
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x 2315 (voice)
    (508) 457-2310 (FAX)
    sackerman@usgs.gov

    Data sources used in this process:
    • g1cdp_nav_kc_utm15.shp

    Data sources produced in this process:

    • g1cdp_nav_kc_geo.shp

  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?

  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 the data.


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)

    Deborah Hutchinson
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2263 (voice)
    (508) 457-2310 (FAX)
    dhutchinson@usgs.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?

    Although this data set has been used by the U.S. Geological Survey (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.

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

  4. How can I download or order the data?

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

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


Who wrote the metadata?

Dates:
Last modified: 10-Mar-2004
Metadata author:
U.S. Geological Survey
c/o Seth Ackerman
GIS Technician
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

(508) 548-8700 x 2315 (voice)
(508) 457-2310 (FAX)
sackerman@usgs.gov

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


Generated by mp version 2.8.6 on Tue Dec 13 09:32:26 2005